Parity-ethereum: Parity Light Client Sync Stuck

[JeremyRubin]

_Before filing a new issue, please provide the following information._

I'm running:

• Parity version: Parity/v1.8.0-unstable-b9c1d0bd1-20170814/x86_64-macos/rustc1.18.0
• Operating system: MacOS
• And installed: from source (rustc 1.20.0-nightly (6d9d82d3d 2017-07-14))

_Your issue description goes here below. Try to include actual vs. expected behavior and steps to reproduce the issue._

---

I tried running parity --light --scale-verifiers --num-verifiers 4 --fast-and-loose (and parity --light) but both times I get stuck at:

2017-08-16 21:42:48  Syncing #1925655 ac02…fc53     0 hdr/s      0+    0 Qed  #1925655    9/50 peers   2 MiB cache 0 bytes queue  RPC:  1 conn,  4 req/s, 139 µs

I would expect it to sync all the way to the current tip, which is currently 4168389.

[5chdn]

Can reproduce this, at a different block number though. Sync simply stalls.

2017-08-17 13:47:11  Syncing #2210563 73a6…e17b   658 hdr/s  16027+    0 Qed  #2210563    4/50 peers   10 MiB cache 13 MiB queue  RPC:  0 conn,  0 req/s,   0 µs
2017-08-17 13:47:16  Syncing #2213435 2385…a45f   573 hdr/s  21088+    0 Qed  #2213435    3/50 peers   10 MiB cache 18 MiB queue  RPC:  0 conn,  0 req/s,   0 µs
2017-08-17 13:47:21  Syncing #2216057 22ad…1b4d   524 hdr/s  18464+    0 Qed  #2216057    5/50 peers   10 MiB cache 16 MiB queue  RPC:  0 conn,  0 req/s,   0 µs
2017-08-17 13:47:26  Syncing #2219259 4a67…0f16   640 hdr/s  15259+    0 Qed  #2219259    6/50 peers   10 MiB cache 13 MiB queue  RPC:  0 conn,  0 req/s,   0 µs
2017-08-17 13:47:31  Syncing #2220819 6237…fc34   312 hdr/s  13706+    0 Qed  #2220819    6/50 peers   10 MiB cache 12 MiB queue  RPC:  0 conn,  0 req/s,   0 µs
2017-08-17 13:47:36  Syncing #2223154 d00e…a9a0   467 hdr/s  30057+    0 Qed  #2223154    6/50 peers   10 MiB cache 25 MiB queue  RPC:  0 conn,  0 req/s,   0 µs
2017-08-17 13:47:41  Syncing #2225086 f6ad…10af   386 hdr/s  30047+    0 Qed  #2225086    6/50 peers   10 MiB cache 25 MiB queue  RPC:  0 conn,  0 req/s,   0 µs
2017-08-17 13:47:46  Syncing #2226739 4341…f996   329 hdr/s  30057+    0 Qed  #2226739    6/50 peers   10 MiB cache 25 MiB queue  RPC:  0 conn,  0 req/s,   0 µs
2017-08-17 13:47:51  Syncing #2228482 aefb…2227   348 hdr/s  29970+    0 Qed  #2228482    6/50 peers   10 MiB cache 25 MiB queue  RPC:  0 conn,  0 req/s,   0 µs
2017-08-17 13:47:56  Syncing #2230053 28bb…2479   314 hdr/s  30071+    0 Qed  #2230053    6/50 peers   10 MiB cache 25 MiB queue  RPC:  0 conn,  0 req/s,   0 µs
2017-08-17 13:48:01  Syncing #2231811 cb7f…0e23   351 hdr/s  30105+    0 Qed  #2231811    6/50 peers   10 MiB cache 25 MiB queue  RPC:  0 conn,  0 req/s,   0 µs
2017-08-17 13:48:06  Syncing #2233681 a2fc…d4ac   374 hdr/s  30028+    0 Qed  #2233681    6/50 peers   10 MiB cache 25 MiB queue  RPC:  0 conn,  0 req/s,   0 µs
2017-08-17 13:48:11  Syncing #2235395 9bb2…424c   342 hdr/s  29979+    0 Qed  #2235395    6/50 peers   10 MiB cache 25 MiB queue  RPC:  0 conn,  0 req/s,   0 µs
2017-08-17 13:48:16  Syncing #2237312 c947…a683   383 hdr/s  29981+    0 Qed  #2237312    6/50 peers   10 MiB cache 25 MiB queue  RPC:  0 conn,  0 req/s,   0 µs
2017-08-17 13:48:21  Syncing #2239486 4495…dd91   434 hdr/s  29984+    0 Qed  #2239486    6/50 peers   10 MiB cache 25 MiB queue  RPC:  0 conn,  0 req/s,   0 µs
2017-08-17 13:48:26  Syncing #2241645 36cf…75e4   431 hdr/s  29997+    0 Qed  #2241645    6/50 peers   10 MiB cache 25 MiB queue  RPC:  0 conn,  0 req/s,   0 µs
2017-08-17 13:48:31  Syncing #2243605 b02d…e993   391 hdr/s  30085+    0 Qed  #2243605    6/50 peers   10 MiB cache 25 MiB queue  RPC:  0 conn,  0 req/s,   0 µs
2017-08-17 13:48:36  Syncing #2245970 2817…6904   473 hdr/s  30005+    0 Qed  #2245970    6/50 peers   10 MiB cache 25 MiB queue  RPC:  0 conn,  0 req/s,   0 µs
2017-08-17 13:48:41  Syncing #2249369 d2d9…5ef1   679 hdr/s  29953+    0 Qed  #2249369    6/50 peers   10 MiB cache 25 MiB queue  RPC:  0 conn,  0 req/s,   0 µs
2017-08-17 13:48:46  Syncing #2251805 9b09…9178   487 hdr/s  29952+    0 Qed  #2251805    6/50 peers   10 MiB cache 25 MiB queue  RPC:  0 conn,  0 req/s,   0 µs
2017-08-17 13:48:51  Syncing #2255426 88e2…708f   724 hdr/s  29917+    1 Qed  #2255426    6/50 peers   10 MiB cache 25 MiB queue  RPC:  0 conn,  0 req/s,   0 µs
2017-08-17 13:48:56  Syncing #2258520 db17…d775   618 hdr/s  30021+    0 Qed  #2258520    6/50 peers   10 MiB cache 25 MiB queue  RPC:  0 conn,  0 req/s,   0 µs
2017-08-17 13:49:06  Syncing #2265371 520d…48c5   685 hdr/s  23684+    0 Qed  #2265371    1/50 peers   10 MiB cache 20 MiB queue  RPC:  0 conn,  0 req/s,   0 µs
2017-08-17 13:49:11  Syncing #2268282 ef28…2c8f   582 hdr/s  20768+    0 Qed  #2268282    3/50 peers   10 MiB cache 17 MiB queue  RPC:  0 conn,  0 req/s,   0 µs
2017-08-17 13:49:16  Syncing #2271232 b38c…f521   590 hdr/s  17822+    0 Qed  #2271232    1/50 peers   10 MiB cache 15 MiB queue  RPC:  0 conn,  0 req/s,   0 µs
2017-08-17 13:49:21  Syncing #2274693 438a…f09a   692 hdr/s  14619+    0 Qed  #2274693    3/50 peers   10 MiB cache 12 MiB queue  RPC:  0 conn,  0 req/s,   0 µs
2017-08-17 13:49:26  Syncing #2278338 c31f…cfdc   729 hdr/s  11484+    0 Qed  #2278338    2/50 peers   10 MiB cache 10 MiB queue  RPC:  0 conn,  0 req/s,   0 µs
2017-08-17 13:49:31  Syncing #2279999 6d4b…bf7c   332 hdr/s  10080+    0 Qed  #2279999    2/50 peers   10 MiB cache 8 MiB queue  RPC:  0 conn,  0 req/s,   0 µs
2017-08-17 13:49:36  Syncing #2282730 ed58…e97f   546 hdr/s   8116+    0 Qed  #2282730    2/50 peers   10 MiB cache 7 MiB queue  RPC:  0 conn,  0 req/s,   0 µs
2017-08-17 13:49:41  Syncing #2285819 71a2…ecc8   617 hdr/s   5020+    0 Qed  #2285819    1/50 peers   10 MiB cache 4 MiB queue  RPC:  0 conn,  0 req/s,   0 µs
2017-08-17 13:49:46  Syncing #2288706 3b09…e163   577 hdr/s   2139+    0 Qed  #2288706    1/50 peers   10 MiB cache 2 MiB queue  RPC:  0 conn,  0 req/s,   0 µs
2017-08-17 13:49:51  Syncing #2289059 209b…46ad    70 hdr/s      0+    0 Qed  #2289059    1/50 peers   10 MiB cache 0 bytes queue  RPC:  0 conn,  0 req/s,   0 µs
2017-08-17 13:49:56  Syncing #2289059 209b…46ad     0 hdr/s      0+    0 Qed  #2289059    1/50 peers   10 MiB cache 0 bytes queue  RPC:  0 conn,  0 req/s,   0 µs
2017-08-17 13:50:01  Syncing #2289059 209b…46ad     0 hdr/s      0+    0 Qed  #2289059    1/50 peers   10 MiB cache 0 bytes queue  RPC:  0 conn,  0 req/s,   0 µs
2017-08-17 13:50:06  Syncing #2289059 209b…46ad     0 hdr/s      0+    0 Qed  #2289059    1/50 peers   10 MiB cache 0 bytes queue  RPC:  0 conn,  0 req/s,   0 µs
2017-08-17 13:50:11  Syncing #2289059 209b…46ad     0 hdr/s      0+    0 Qed  #2289059    1/50 peers   10 MiB cache 0 bytes queue  RPC:  0 conn,  0 req/s,   0 µs
2017-08-17 13:50:16  Syncing #2289059 209b…46ad     0 hdr/s      0+    0 Qed  #2289059    1/50 peers   10 MiB cache 0 bytes queue  RPC:  0 conn,  0 req/s,   0 µs
2017-08-17 13:50:21  Syncing #2289059 209b…46ad     0 hdr/s      0+    0 Qed  #2289059    1/50 peers   10 MiB cache 0 bytes queue  RPC:  0 conn,  0 req/s,   0 µs
2017-08-17 13:50:31  Syncing #2289059 209b…46ad     0 hdr/s      0+    0 Qed  #2289059    1/50 peers   10 MiB cache 0 bytes queue  RPC:  0 conn,  0 req/s,   0 µs
2017-08-17 13:50:36  Syncing #2289059 209b…46ad     0 hdr/s      0+    0 Qed  #2289059    1/50 peers   10 MiB cache 0 bytes queue  RPC:  0 conn,  0 req/s,   0 µs
2017-08-17 13:50:41  Syncing #2289059 209b…46ad     0 hdr/s      0+    0 Qed  #2289059    1/50 peers   10 MiB cache 0 bytes queue  RPC:  0 conn,  0 req/s,   0 µs
2017-08-17 13:50:46  Syncing #2289059 209b…46ad     0 hdr/s      0+    0 Qed  #2289059    1/50 peers   10 MiB cache 0 bytes queue  RPC:  0 conn,  0 req/s,   0 µs
2017-08-17 13:50:51  Syncing #2289059 209b…46ad     0 hdr/s      0+    0 Qed  #2289059    1/50 peers   10 MiB cache 0 bytes queue  RPC:  0 conn,  0 req/s,   0 µs
2017-08-17 13:50:56  Syncing #2289059 209b…46ad     0 hdr/s      0+    0 Qed  #2289059    1/50 peers   10 MiB cache 0 bytes queue  RPC:  0 conn,  0 req/s,   0 µs
2017-08-17 13:51:01  Syncing #2289059 209b…46ad     0 hdr/s      0+    0 Qed  #2289059    1/50 peers   10 MiB cache 0 bytes queue  RPC:  0 conn,  0 req/s,   0 µs
2017-08-17 13:51:06  Syncing #2289059 209b…46ad     0 hdr/s      0+    0 Qed  #2289059    1/50 peers   10 MiB cache 0 bytes queue  RPC:  0 conn,  0 req/s,   0 µs
2017-08-17 13:51:16  Syncing #2289059 209b…46ad     0 hdr/s      0+    0 Qed  #2289059    1/50 peers   10 MiB cache 0 bytes queue  RPC:  0 conn,  0 req/s,   0 µs
2017-08-17 13:51:21  Syncing #2289059 209b…46ad     0 hdr/s      0+    0 Qed  #2289059    1/50 peers   10 MiB cache 0 bytes queue  RPC:  0 conn,  0 req/s,   0 µs
2017-08-17 13:51:26  Syncing #2289059 209b…46ad     0 hdr/s      0+    0 Qed  #2289059    1/50 peers   10 MiB cache 0 bytes queue  RPC:  0 conn,  0 req/s,   0 µs
2017-08-17 13:51:31  Syncing #2289059 209b…46ad     0 hdr/s      0+    0 Qed  #2289059    1/50 peers   10 MiB cache 0 bytes queue  RPC:  0 conn,  0 req/s,   0 µs
2017-08-17 13:51:36  Syncing #2289059 209b…46ad     0 hdr/s      0+    0 Qed  #2289059    1/50 peers   10 MiB cache 0 bytes queue  RPC:  0 conn,  0 req/s,   0 µs
2017-08-17 13:51:41  Syncing #2289059 209b…46ad     0 hdr/s      0+    0 Qed  #2289059    1/50 peers   10 MiB cache 0 bytes queue  RPC:  0 conn,  0 req/s,   0 µs
2017-08-17 13:51:46  Syncing #2289059 209b…46ad     0 hdr/s      0+    0 Qed  #2289059    1/50 peers   10 MiB cache 0 bytes queue  RPC:  0 conn,  0 req/s,   0 µs
2017-08-17 13:51:51  Syncing #2289059 209b…46ad     0 hdr/s      0+    0 Qed  #2289059    1/50 peers   10 MiB cache 0 bytes queue  RPC:  0 conn,  0 req/s,   0 µs
2017-08-17 13:51:56  Syncing #2289059 209b…46ad     0 hdr/s      0+    0 Qed  #2289059    1/50 peers   10 MiB cache 0 bytes queue  RPC:  0 conn,  0 req/s,   0 µs
2017-08-17 13:52:01  Syncing #2289059 209b…46ad     0 hdr/s      0+    0 Qed  #2289059    1/50 peers   10 MiB cache 0 bytes queue  RPC:  0 conn,  0 req/s,   0 µs
2017-08-17 13:52:06  Syncing #2289059 209b…46ad     0 hdr/s      0+    0 Qed  #2289059    1/50 peers   10 MiB cache 0 bytes queue  RPC:  0 conn,  0 req/s,   0 µs
2017-08-17 13:52:11  Syncing #2289059 209b…46ad     0 hdr/s      0+    0 Qed  #2289059    1/50 peers   10 MiB cache 0 bytes queue  RPC:  0 conn,  0 req/s,   0 µs
2017-08-17 13:52:16  Syncing #2289059 209b…46ad     0 hdr/s      0+    0 Qed  #2289059    1/50 peers   10 MiB cache 0 bytes queue  RPC:  0 conn,  0 req/s,   0 µs
2017-08-17 13:52:21  Syncing #2289059 209b…46ad     0 hdr/s      0+    0 Qed  #2289059    1/50 peers   10 MiB cache 0 bytes queue  RPC:  0 conn,  0 req/s,   0 µs
2017-08-17 13:52:26  Syncing #2289059 209b…46ad     0 hdr/s      0+    0 Qed  #2289059    1/50 peers   10 MiB cache 0 bytes queue  RPC:  0 conn,  0 req/s,   0 µs
2017-08-17 13:52:31  Syncing #2289059 209b…46ad     0 hdr/s      0+    0 Qed  #2289059    1/50 peers   10 MiB cache 0 bytes queue  RPC:  0 conn,  0 req/s,   0 µs
2017-08-17 13:52:36  Syncing #2289059 209b…46ad     0 hdr/s      0+    0 Qed  #2289059    1/50 peers   10 MiB cache 0 bytes queue  RPC:  0 conn,  0 req/s,   0 µs
2017-08-17 13:52:41  Syncing #2289059 209b…46ad     0 hdr/s      0+    0 Qed  #2289059    1/50 peers   10 MiB cache 0 bytes queue  RPC:  0 conn,  0 req/s,   0 µs
2017-08-17 13:52:46  Syncing #2289059 209b…46ad     0 hdr/s      0+    0 Qed  #2289059    1/50 peers   10 MiB cache 0 bytes queue  RPC:  0 conn,  0 req/s,   0 µs
2017-08-17 13:52:51  Syncing #2289059 209b…46ad     0 hdr/s      0+    0 Qed  #2289059    1/50 peers   10 MiB cache 0 bytes queue  RPC:  0 conn,  0 req/s,   0 µs
2017-08-17 13:52:56  Syncing #2289059 209b…46ad     0 hdr/s      0+    0 Qed  #2289059    2/50 peers   10 MiB cache 0 bytes queue  RPC:  0 conn,  0 req/s,   0 µs
2017-08-17 13:53:01  Syncing #2289059 209b…46ad     0 hdr/s      0+    0 Qed  #2289059    1/50 peers   10 MiB cache 0 bytes queue  RPC:  0 conn,  0 req/s,   0 µs
2017-08-17 13:53:06  Syncing #2289059 209b…46ad     0 hdr/s      0+    0 Qed  #2289059    1/50 peers   10 MiB cache 0 bytes queue  RPC:  0 conn,  0 req/s,   0 µs
2017-08-17 13:53:11  Syncing #2289059 209b…46ad     0 hdr/s      0+    0 Qed  #2289059    2/50 peers   10 MiB cache 0 bytes queue  RPC:  0 conn,  0 req/s,   0 µs
2017-08-17 13:53:16  Syncing #2289059 209b…46ad     0 hdr/s      0+    0 Qed  #2289059    1/50 peers   10 MiB cache 0 bytes queue  RPC:  0 conn,  0 req/s,   0 µs
2017-08-17 13:53:21  Syncing #2289059 209b…46ad     0 hdr/s      0+    0 Qed  #2289059    1/50 peers   10 MiB cache 0 bytes queue  RPC:  0 conn,  0 req/s,   0 µs
2017-08-17 13:53:26  Syncing #2289059 209b…46ad     0 hdr/s      0+    0 Qed  #2289059    1/50 peers   10 MiB cache 0 bytes queue  RPC:  0 conn,  0 req/s,   0 µs
2017-08-17 13:53:31  Syncing #2289059 209b…46ad     0 hdr/s      0+    0 Qed  #2289059    1/50 peers   10 MiB cache 0 bytes queue  RPC:  0 conn,  0 req/s,   0 µs
2017-08-17 13:53:36  Syncing #2289059 209b…46ad     0 hdr/s      0+    0 Qed  #2289059    2/50 peers   10 MiB cache 0 bytes queue  RPC:  0 conn,  0 req/s,   0 µs
2017-08-17 13:53:41  Syncing #2289059 209b…46ad     0 hdr/s     79+    0 Qed  #2289059    3/50 peers   10 MiB cache 76 KiB queue  RPC:  0 conn,  0 req/s,   0 µs
2017-08-17 13:53:46  Syncing #2289059 209b…46ad     0 hdr/s      0+    0 Qed  #2289059    2/50 peers   10 MiB cache 0 bytes queue  RPC:  0 conn,  0 req/s,   0 µs
2017-08-17 13:53:51  Syncing #2289059 209b…46ad     0 hdr/s    139+    0 Qed  #2289059    3/50 peers   10 MiB cache 133 KiB queue  RPC:  0 conn,  0 req/s,   0 µs
2017-08-17 13:53:56  Syncing #2289059 209b…46ad     0 hdr/s      0+    0 Qed  #2289059    2/50 peers   10 MiB cache 0 bytes queue  RPC:  0 conn,  0 req/s,   0 µs
2017-08-17 13:54:01  Syncing #2289059 209b…46ad     0 hdr/s      0+    0 Qed  #2289059    2/50 peers   10 MiB cache 0 bytes queue  RPC:  0 conn,  0 req/s,   0 µs
2017-08-17 13:54:06  Syncing #2289059 209b…46ad     0 hdr/s    393+    0 Qed  #2289059    2/50 peers   10 MiB cache 342 KiB queue  RPC:  0 conn,  0 req/s,   0 µs
2017-08-17 13:54:11  Syncing #2289059 209b…46ad     0 hdr/s      0+    0 Qed  #2289059    1/50 peers   10 MiB cache 0 bytes queue  RPC:  0 conn,  0 req/s,   0 µs
2017-08-17 13:54:16  Syncing #2289059 209b…46ad     0 hdr/s      0+    0 Qed  #2289059    3/50 peers   10 MiB cache 0 bytes queue  RPC:  0 conn,  0 req/s,   0 µs
2017-08-17 13:54:21  Syncing #2289059 209b…46ad     0 hdr/s      0+    0 Qed  #2289059    2/50 peers   10 MiB cache 0 bytes queue  RPC:  0 conn,  0 req/s,   0 µs
2017-08-17 13:54:26  Syncing #2289059 209b…46ad     0 hdr/s      0+    0 Qed  #2289059    2/50 peers   10 MiB cache 0 bytes queue  RPC:  0 conn,  0 req/s,   0 µs
2017-08-17 13:54:31  Syncing #2289059 209b…46ad     0 hdr/s      0+    0 Qed  #2289059    1/50 peers   10 MiB cache 0 bytes queue  RPC:  0 conn,  0 req/s,   0 µs
2017-08-17 13:54:36  Syncing #2289059 209b…46ad     0 hdr/s      0+    0 Qed  #2289059    2/50 peers   10 MiB cache 0 bytes queue  RPC:  0 conn,  0 req/s,   0 µs
2017-08-17 13:54:41  Syncing #2289059 209b…46ad     0 hdr/s      0+    0 Qed  #2289059    2/50 peers   10 MiB cache 0 bytes queue  RPC:  0 conn,  0 req/s,   0 µs
2017-08-17 13:54:46  Syncing #2289059 209b…46ad     0 hdr/s      0+    0 Qed  #2289059    3/50 peers   10 MiB cache 0 bytes queue  RPC:  0 conn,  0 req/s,   0 µs
2017-08-17 13:54:51  Syncing #2289059 209b…46ad     0 hdr/s      0+    0 Qed  #2289059    1/50 peers   10 MiB cache 0 bytes queue  RPC:  0 conn,  0 req/s,   0 µs
2017-08-17 13:54:56  Syncing #2289059 209b…46ad     0 hdr/s      0+    0 Qed  #2289059    1/50 peers   10 MiB cache 0 bytes queue  RPC:  0 conn,  0 req/s,   0 µs
2017-08-17 13:55:01  Syncing #2289059 209b…46ad     0 hdr/s      0+    0 Qed  #2289059    1/50 peers   10 MiB cache 0 bytes queue  RPC:  0 conn,  0 req/s,   0 µs
2017-08-17 13:55:06  Syncing #2289059 209b…46ad     0 hdr/s      0+    0 Qed  #2289059    1/50 peers   10 MiB cache 0 bytes queue  RPC:  0 conn,  0 req/s,   0 µs
2017-08-17 13:55:11  Syncing #2289059 209b…46ad     0 hdr/s      0+    0 Qed  #2289059    2/50 peers   10 MiB cache 0 bytes queue  RPC:  0 conn,  0 req/s,   0 µs
2017-08-17 13:55:16  Syncing #2289059 209b…46ad     0 hdr/s      0+    0 Qed  #2289059    1/50 peers   10 MiB cache 0 bytes queue  RPC:  0 conn,  0 req/s,   0 µs
2017-08-17 13:55:21  Syncing #2289059 209b…46ad     0 hdr/s      0+    0 Qed  #2289059    1/50 peers   10 MiB cache 0 bytes queue  RPC:  0 conn,  0 req/s,   0 µs
2017-08-17 13:55:26  Syncing #2289059 209b…46ad     0 hdr/s      0+    0 Qed  #2289059    1/50 peers   10 MiB cache 0 bytes queue  RPC:  0 conn,  0 req/s,   0 µs
2017-08-17 13:55:31  Syncing #2289059 209b…46ad     0 hdr/s      0+    0 Qed  #2289059    1/50 peers   10 MiB cache 0 bytes queue  RPC:  0 conn,  0 req/s,   0 µs
2017-08-17 13:55:36  Syncing #2289059 209b…46ad     0 hdr/s      0+    0 Qed  #2289059    2/50 peers   10 MiB cache 0 bytes queue  RPC:  0 conn,  0 req/s,   0 µs
2017-08-17 13:55:41  Syncing #2289059 209b…46ad     0 hdr/s      0+    0 Qed  #2289059    1/50 peers   10 MiB cache 0 bytes queue  RPC:  0 conn,  0 req/s,   0 µs
2017-08-17 13:55:46  Syncing #2289059 209b…46ad     0 hdr/s      0+    0 Qed  #2289059    1/50 peers   10 MiB cache 0 bytes queue  RPC:  0 conn,  0 req/s,   0 µs
2017-08-17 13:55:51  Syncing #2289059 209b…46ad     0 hdr/s      0+    0 Qed  #2289059    1/50 peers   10 MiB cache 0 bytes queue  RPC:  0 conn,  0 req/s,   0 µs
2017-08-17 13:55:56  Syncing #2289059 209b…46ad     0 hdr/s      0+    0 Qed  #2289059    1/50 peers   10 MiB cache 0 bytes queue  RPC:  0 conn,  0 req/s,   0 µs
2017-08-17 13:56:01  Syncing #2289059 209b…46ad     0 hdr/s      0+    0 Qed  #2289059    1/50 peers   10 MiB cache 0 bytes queue  RPC:  0 conn,  0 req/s,   0 µs
2017-08-17 13:56:06  Syncing #2289059 209b…46ad     0 hdr/s      0+    0 Qed  #2289059    2/50 peers   10 MiB cache 0 bytes queue  RPC:  0 conn,  0 req/s,   0 µs
2017-08-17 13:56:11  Syncing #2289059 209b…46ad     0 hdr/s      0+    0 Qed  #2289059    1/50 peers   10 MiB cache 0 bytes queue  RPC:  0 conn,  0 req/s,   0 µs
2017-08-17 13:56:16  Syncing #2289059 209b…46ad     0 hdr/s      0+    0 Qed  #2289059    2/50 peers   10 MiB cache 0 bytes queue  RPC:  0 conn,  0 req/s,   0 µs
2017-08-17 13:56:21  Syncing #2289059 209b…46ad     0 hdr/s      0+    0 Qed  #2289059    1/50 peers   10 MiB cache 0 bytes queue  RPC:  0 conn,  0 req/s,   0 µs
2017-08-17 13:56:26  Syncing #2289059 209b…46ad     0 hdr/s      0+    0 Qed  #2289059    1/50 peers   10 MiB cache 0 bytes queue  RPC:  0 conn,  0 req/s,   0 µs
2017-08-17 13:56:31  Syncing #2289059 209b…46ad     0 hdr/s      0+    0 Qed  #2289059    2/50 peers   10 MiB cache 0 bytes queue  RPC:  0 conn,  0 req/s,   0 µs
2017-08-17 13:56:36  Syncing #2289059 209b…46ad     0 hdr/s      0+    0 Qed  #2289059    2/50 peers   10 MiB cache 0 bytes queue  RPC:  0 conn,  0 req/s,   0 µs
2017-08-17 13:56:41  Syncing #2289059 209b…46ad     0 hdr/s      0+    0 Qed  #2289059    1/50 peers   10 MiB cache 0 bytes queue  RPC:  0 conn,  0 req/s,   0 µs
2017-08-17 13:56:46  Syncing #2289059 209b…46ad     0 hdr/s      0+    0 Qed  #2289059    2/50 peers   10 MiB cache 0 bytes queue  RPC:  0 conn,  0 req/s,   0 µs
2017-08-17 13:56:51  Syncing #2289059 209b…46ad     0 hdr/s      0+    0 Qed  #2289059    1/50 peers   10 MiB cache 0 bytes queue  RPC:  0 conn,  0 req/s,   0 µs
2017-08-17 13:56:56  Syncing #2289059 209b…46ad     0 hdr/s      0+    0 Qed  #2289059    1/50 peers   10 MiB cache 0 bytes queue  RPC:  0 conn,  0 req/s,   0 µs
2017-08-17 13:57:01  Syncing #2289059 209b…46ad     0 hdr/s      0+    0 Qed  #2289059    1/50 peers   10 MiB cache 0 bytes queue  RPC:  0 conn,  0 req/s,   0 µs
2017-08-17 13:57:06  Syncing #2289059 209b…46ad     0 hdr/s      0+    0 Qed  #2289059    2/50 peers   10 MiB cache 0 bytes queue  RPC:  0 conn,  0 req/s,   0 µs
2017-08-17 13:57:11  Syncing #2289059 209b…46ad     0 hdr/s      0+    0 Qed  #2289059    1/50 peers   10 MiB cache 0 bytes queue  RPC:  0 conn,  0 req/s,   0 µs
2017-08-17 13:57:16  Syncing #2289059 209b…46ad     0 hdr/s      0+    0 Qed  #2289059    1/50 peers   10 MiB cache 0 bytes queue  RPC:  0 conn,  0 req/s,   0 µs
2017-08-17 13:57:21  Syncing #2289059 209b…46ad     0 hdr/s      0+    0 Qed  #2289059    1/50 peers   10 MiB cache 0 bytes queue  RPC:  0 conn,  0 req/s,   0 µs
2017-08-17 13:57:26  Syncing #2289059 209b…46ad     0 hdr/s      0+    0 Qed  #2289059    1/50 peers   10 MiB cache 0 bytes queue  RPC:  0 conn,  0 req/s,   0 µs
2017-08-17 13:57:31  Syncing #2289059 209b…46ad     0 hdr/s      0+    0 Qed  #2289059    1/50 peers   10 MiB cache 0 bytes queue  RPC:  0 conn,  0 req/s,   0 µs
2017-08-17 13:57:36  Syncing #2289059 209b…46ad     0 hdr/s      0+    0 Qed  #2289059    1/50 peers   10 MiB cache 0 bytes queue  RPC:  0 conn,  0 req/s,   0 µs
2017-08-17 13:57:41  Syncing #2289059 209b…46ad     0 hdr/s      0+    0 Qed  #2289059    1/50 peers   10 MiB cache 0 bytes queue  RPC:  0 conn,  0 req/s,   0 µs
2017-08-17 13:57:46  Syncing #2289059 209b…46ad     0 hdr/s      0+    0 Qed  #2289059    1/50 peers   10 MiB cache 0 bytes queue  RPC:  0 conn,  0 req/s,   0 µs
2017-08-17 13:57:51  Syncing #2289059 209b…46ad     0 hdr/s      0+    0 Qed  #2289059    1/50 peers   10 MiB cache 0 bytes queue  RPC:  0 conn,  0 req/s,   0 µs

[sbuljac]

Same here, different block number.(macOS 10.12.6)

[rphmeier]

could be simply that request credits are running out. "pip=trace" logs would be helpful, although it would produce a lot. the last 30 seconds would be enough in any case.

[NiklasKunkel]

Having the exact same problem. Constantly stalls and will remain stalled until I kill and restart the client.

[Robzz]

FWIW I had the same problem but it went away when compiling and running the latest master.

[NiklasKunkel]

@Robzz I just tried with the latest commit on master running on Ubuntu and it still stalls during sync.

[detailyang]

+1 for Parity//v1.7.0-beta-5f2cabd-20170727/x86_64-macos/rustc1.18.0

[WyseNynja]

+1 for Parity//v1.7.2-beta-9f47909-20170918/x86_64-linux-gnu/rustc1.19.0

laptop went to sleep. came back and its stuck at 1938838. restarting doesn't change anything. how should I enable better logging to help debug?

[WyseNynja]

Ran parity inside docker (which uses the 1.7.2 deb) with --logging pip=trace --light --reserved-only and a reserved peer file that points to my recently setup archival node

https://gist.github.com/WyseNynja/30fd6df9ca726604043a452e5bc525fc

If I remove --light from the command, the container starts syncing fine.

I have grafana setup for my archival node and so have a graph of upload bandwidth for the parity container:

[WyseNynja]

Started a light client from scratch with pip=trace logging and --reserved-only pointed at my archival node: https://gist.github.com/WyseNynja/4a956ca5e3a5a8b24be3aa0376eff030

EDIT 1 (12:15 PM PST): It stalled a couple times so far, but it resumes after a few minutes.

EDIT 2 (4:15 PM PST): Sigh. Of course with logging on, it it was able to sync fully

[WyseNynja]

My node got stuck again. Pretty useless logs.

2017-09-25 18:32:48 UTC IO Worker #1 TRACE pip  Sending status to peer 0
2017-09-25 18:32:48 UTC IO Worker #1 TRACE pip  Peer 0 disconnecting
2017-09-25 18:32:49 UTC IO Worker #1 TRACE pip  Sending status to peer 0
2017-09-25 18:32:49 UTC IO Worker #0 TRACE pip  Peer 0 disconnecting
2017-09-25 18:32:49 UTC IO Worker #1 DEBUG pip  Error sending packet to peer 0: Network error (Expired message)
2017-09-25 18:32:51 UTC IO Worker #3 TRACE pip  Sending status to peer 0
2017-09-25 18:32:51 UTC IO Worker #0 TRACE pip  Peer 0 disconnecting
2017-09-25 18:32:52 UTC IO Worker #1 TRACE pip  Sending status to peer 0
2017-09-25 18:32:52 UTC IO Worker #0 TRACE pip  Peer 0 disconnecting
2017-09-25 18:32:53 UTC IO Worker #1 TRACE pip  Sending status to peer 0
2017-09-25 18:32:53 UTC IO Worker #3 TRACE pip  Peer 0 disconnecting
2017-09-25 18:32:55 UTC IO Worker #1 TRACE pip  Sending status to peer 0
2017-09-25 18:32:55 UTC IO Worker #3 TRACE pip  Peer 0 disconnecting
2017-09-25 18:32:55 UTC IO Worker #1 TRACE pip  Sending status to peer 0
2017-09-25 18:32:55 UTC IO Worker #2 TRACE pip  Peer 0 disconnecting
2017-09-25 18:32:56 UTC IO Worker #2 TRACE pip  Sending status to peer 0
2017-09-25 18:32:56 UTC IO Worker #1 TRACE pip  Peer 0 disconnecting
2017-09-25 18:32:57 UTC IO Worker #3 TRACE pip  Sending status to peer 0
2017-09-25 18:32:57 UTC IO Worker #2 TRACE pip  Peer 0 disconnecting
2017-09-25 18:32:57 UTC IO Worker #3 DEBUG pip  Error sending packet to peer 0: Network error (Expired message)
2017-09-25 18:32:59 UTC IO Worker #0 TRACE pip  Sending status to peer 0
2017-09-25 18:32:59 UTC IO Worker #2 TRACE pip  Peer 0 disconnecting
2017-09-25 18:32:59 UTC IO Worker #0 TRACE pip  Sending status to peer 1
2017-09-25 18:32:59 UTC IO Worker #3 TRACE pip  Peer 1 disconnecting
2017-09-25 18:32:59 UTC IO Worker #0 DEBUG pip  Error sending packet to peer 1: Network error (Expired message)
2017-09-25 18:33:00 UTC IO Worker #1 TRACE pip  Sending status to peer 1
2017-09-25 18:33:00 UTC IO Worker #2 TRACE pip  Peer 1 disconnecting
2017-09-25 18:33:02 UTC IO Worker #1 TRACE pip  Sending status to peer 1
2017-09-25 18:33:02 UTC IO Worker #3 TRACE pip  Peer 1 disconnecting
2017-09-25 18:33:02 UTC IO Worker #1 TRACE pip  Sending status to peer 1
2017-09-25 18:33:02 UTC IO Worker #3 TRACE pip  Peer 1 disconnecting
2017-09-25 18:33:03 UTC IO Worker #2 TRACE pip  Sending status to peer 1
2017-09-25 18:33:03 UTC IO Worker #1 TRACE pip  Peer 1 disconnecting
2017-09-25 18:33:03 UTC IO Worker #2 DEBUG pip  Error sending packet to peer 1: Network error (Expired message)
2017-09-25 18:33:04 UTC IO Worker #0 TRACE pip  Sending status to peer 1
2017-09-25 18:33:04 UTC IO Worker #2 TRACE pip  Peer 1 disconnecting
2017-09-25 18:33:06 UTC IO Worker #3 TRACE pip  Sending status to peer 1
2017-09-25 18:33:06 UTC IO Worker #0 TRACE pip  Peer 1 disconnecting
2017-09-25 18:33:07 UTC IO Worker #0 TRACE pip  Sending status to peer 1
2017-09-25 18:33:07 UTC IO Worker #1 TRACE pip  Peer 1 disconnecting
2017-09-25 18:33:09 UTC IO Worker #0 TRACE pip  Sending status to peer 1
2017-09-25 18:33:09 UTC IO Worker #3 TRACE pip  Peer 1 disconnecting
2017-09-25 18:33:10 UTC IO Worker #1 TRACE pip  Sending status to peer 1
2017-09-25 18:33:10 UTC IO Worker #3 TRACE pip  Peer 1 disconnecting
2017-09-25 18:33:10 UTC IO Worker #1 DEBUG pip  Error sending packet to peer 1: Network error (Expired message)
2017-09-25 18:33:10 UTC IO Worker #3 TRACE pip  Sending status to peer 1
2017-09-25 18:33:11 UTC IO Worker #0 TRACE pip  Peer 1 disconnecting
2017-09-25 18:33:12 UTC IO Worker #3 TRACE pip  Sending status to peer 0
2017-09-25 18:33:12 UTC IO Worker #2 TRACE pip  Peer 0 disconnecting
2017-09-25 18:33:12 UTC IO Worker #2 TRACE pip  Sending status to peer 0
2017-09-25 18:33:12 UTC IO Worker #2 TRACE pip  Peer 0 disconnecting
2017-09-25 18:33:13 UTC IO Worker #2 INFO import     0/50 peers   664 bytes cache  0 bytes queue  RPC:  0 conn,  0 req/s,   0 µs
2017-09-25 18:33:15 UTC IO Worker #0 TRACE pip  Sending status to peer 0
2017-09-25 18:33:15 UTC IO Worker #2 TRACE pip  Peer 0 disconnecting
2017-09-25 18:33:15 UTC IO Worker #0 DEBUG pip  Error sending packet to peer 0: Network error (Expired message)
2017-09-25 18:33:15 UTC IO Worker #3 TRACE pip  Sending status to peer 0
2017-09-25 18:33:16 UTC IO Worker #0 TRACE pip  Peer 0 disconnecting
2017-09-25 18:33:17 UTC IO Worker #2 TRACE pip  Sending status to peer 0
2017-09-25 18:33:17 UTC IO Worker #1 TRACE pip  Peer 0 disconnecting
2017-09-25 18:33:21 UTC IO Worker #1 TRACE pip  Sending status to peer 1
2017-09-25 18:33:22 UTC IO Worker #1 TRACE pip  Peer 1 disconnecting
2017-09-25 18:33:23 UTC IO Worker #0 TRACE pip  Sending status to peer 1
2017-09-25 18:33:23 UTC IO Worker #1 TRACE pip  Peer 1 disconnecting
2017-09-25 18:33:27 UTC IO Worker #2 TRACE pip  Sending status to peer 1
2017-09-25 18:33:27 UTC IO Worker #1 TRACE pip  Peer 1 disconnecting
2017-09-25 18:33:28 UTC IO Worker #3 TRACE pip  Sending status to peer 2
2017-09-25 18:33:28 UTC IO Worker #2 TRACE pip  Peer 2 disconnecting
2017-09-25 18:33:29 UTC IO Worker #3 TRACE pip  Sending status to peer 2
2017-09-25 18:33:29 UTC IO Worker #1 TRACE pip  Peer 2 disconnecting
2017-09-25 18:33:31 UTC IO Worker #0 TRACE pip  Sending status to peer 2
2017-09-25 18:33:31 UTC IO Worker #1 TRACE pip  Peer 2 disconnecting
2017-09-25 18:33:32 UTC IO Worker #3 TRACE pip  Sending status to peer 1
2017-09-25 18:33:32 UTC IO Worker #3 TRACE pip  Peer 1 disconnecting
2017-09-25 18:33:33 UTC IO Worker #0 TRACE pip  Sending status to peer 2
2017-09-25 18:33:33 UTC IO Worker #3 TRACE pip  Peer 2 disconnecting
2017-09-25 18:33:33 UTC IO Worker #0 DEBUG pip  Error sending packet to peer 2: Network error (Expired message)
2017-09-25 18:33:34 UTC IO Worker #1 TRACE pip  Sending status to peer 2
2017-09-25 18:33:34 UTC IO Worker #3 TRACE pip  Peer 2 disconnecting
2017-09-25 18:33:35 UTC IO Worker #1 TRACE pip  Sending status to peer 2
2017-09-25 18:33:35 UTC IO Worker #3 TRACE pip  Peer 2 disconnecting
2017-09-25 18:33:37 UTC IO Worker #3 TRACE pip  Sending status to peer 2
2017-09-25 18:33:37 UTC IO Worker #3 TRACE pip  Peer 2 disconnecting
2017-09-25 18:33:38 UTC IO Worker #3 TRACE pip  Sending status to peer 2
2017-09-25 18:33:38 UTC IO Worker #1 TRACE pip  Peer 2 disconnecting
2017-09-25 18:33:38 UTC IO Worker #3 DEBUG pip  Error sending packet to peer 2: Network error (Expired message)
2017-09-25 18:33:39 UTC IO Worker #1 TRACE pip  Sending status to peer 2
2017-09-25 18:33:39 UTC IO Worker #1 TRACE pip  Peer 2 disconnecting
2017-09-25 18:33:40 UTC IO Worker #0 TRACE pip  Sending status to peer 2
2017-09-25 18:33:40 UTC IO Worker #3 TRACE pip  Peer 2 disconnecting
2017-09-25 18:33:41 UTC IO Worker #1 TRACE pip  Sending status to peer 2
2017-09-25 18:33:41 UTC IO Worker #3 TRACE pip  Peer 2 disconnecting
2017-09-25 18:33:41 UTC IO Worker #1 DEBUG pip  Error sending packet to peer 2: Network error (Expired message)
2017-09-25 18:33:42 UTC IO Worker #3 TRACE pip  Sending status to peer 2
2017-09-25 18:33:42 UTC IO Worker #3 TRACE pip  Peer 2 disconnecting
2017-09-25 18:33:43 UTC IO Worker #2 TRACE pip  Sending status to peer 2
2017-09-25 18:33:43 UTC IO Worker #1 TRACE pip  Peer 2 disconnecting
2017-09-25 18:33:43 UTC IO Worker #1 INFO import     0/50 peers   664 bytes cache  0 bytes queue  RPC:  0 conn,  0 req/s,   0 µs
2017-09-25 18:33:44 UTC IO Worker #3 TRACE pip  Sending status to peer 2
2017-09-25 18:33:44 UTC IO Worker #1 TRACE pip  Peer 2 disconnecting
2017-09-25 18:33:46 UTC IO Worker #0 TRACE pip  Sending status to peer 2
2017-09-25 18:33:46 UTC IO Worker #1 TRACE pip  Peer 2 disconnecting
2017-09-25 18:33:46 UTC IO Worker #0 DEBUG pip  Error sending packet to peer 2: Network error (Expired message)
2017-09-25 18:33:46 UTC IO Worker #1 TRACE pip  Sending status to peer 2
2017-09-25 18:33:46 UTC IO Worker #1 TRACE pip  Peer 2 disconnecting
2017-09-25 18:33:47 UTC IO Worker #3 TRACE pip  Sending status to peer 2
2017-09-25 18:33:47 UTC IO Worker #2 TRACE pip  Peer 2 disconnecting
2017-09-25 18:33:48 UTC IO Worker #3 TRACE pip  Sending status to peer 2
2017-09-25 18:33:48 UTC IO Worker #2 TRACE pip  Peer 2 disconnecting
2017-09-25 18:33:49 UTC IO Worker #2 TRACE pip  Sending status to peer 2
2017-09-25 18:33:49 UTC IO Worker #2 DEBUG pip  Error sending packet to peer 2: Network error (Expired message)
2017-09-25 18:33:49 UTC IO Worker #1 TRACE pip  Peer 2 disconnecting
2017-09-25 18:33:50 UTC IO Worker #3 TRACE pip  Sending status to peer 2
2017-09-25 18:33:50 UTC IO Worker #0 TRACE pip  Peer 2 disconnecting
2017-09-25 18:33:51 UTC IO Worker #3 TRACE pip  Sending status to peer 2
2017-09-25 18:33:51 UTC IO Worker #0 TRACE pip  Peer 2 disconnecting
2017-09-25 18:33:51 UTC IO Worker #3 DEBUG pip  Error sending packet to peer 2: Network error (Expired message)
2017-09-25 18:33:52 UTC IO Worker #1 TRACE pip  Sending status to peer 2
2017-09-25 18:33:52 UTC IO Worker #2 TRACE pip  Peer 2 disconnecting
2017-09-25 18:33:52 UTC IO Worker #1 DEBUG pip  Error sending packet to peer 2: Network error (Expired message)
2017-09-25 18:33:53 UTC IO Worker #3 TRACE pip  Sending status to peer 2
2017-09-25 18:33:53 UTC IO Worker #1 TRACE pip  Peer 2 disconnecting
2017-09-25 18:33:53 UTC IO Worker #3 DEBUG pip  Error sending packet to peer 2: Network error (Expired message)
2017-09-25 18:33:54 UTC IO Worker #3 TRACE pip  Sending status to peer 2
2017-09-25 18:33:54 UTC IO Worker #3 TRACE pip  Peer 2 disconnecting
2017-09-25 18:33:55 UTC IO Worker #2 TRACE pip  Sending status to peer 2
2017-09-25 18:33:55 UTC IO Worker #2 TRACE pip  Peer 2 disconnecting
2017-09-25 18:33:56 UTC IO Worker #3 TRACE pip  Sending status to peer 2
2017-09-25 18:33:56 UTC IO Worker #2 TRACE pip  Peer 2 disconnecting
2017-09-25 18:33:57 UTC IO Worker #2 TRACE pip  Sending status to peer 2
2017-09-25 18:33:57 UTC IO Worker #3 TRACE pip  Peer 2 disconnecting

After a few minutes of that it started again. What logging should I enable on the other side? My guess is @rphmeier is right about request credits simply running out. I would have expected a reserved peer to not be able to run out of credits though. And without --reserved-peers it still seems to stall sometimes.

[rphmeier]

@WyseNynja Currently there isn't any logic that gives reserved peers infinite credits, although that would definitely be a useful addition! In general, it can be pretty hard to find peers to serve light client data, because many do not. An upgraded peer discovery protocol could alleviate that for sure.

[5chdn]

I was able to light-sync musicoin with latest master and the sync was also stuck at some point. I was connected to my own archive node (nobody else is running a light-serving node on musicoin), and after shutting down the light client, restarting the archival node, and restarting the light client, it was able to finish the sync.

Minor annoyance: after completing the sync, the logs do not show the latest block number, so I can only verify it's finished via RPC/WS or UI.

2017-09-26 10:23:14  Syncing #1052064 9add…8280   234 hdr/s  29932+    0 Qed  #1052064    3/50 peers   10 MiB cache 25 MiB queue  RPC:  0 conn,  0 req/s,   0 µs
2017-09-26 10:23:19  Syncing #1053867 e19b…6e46   360 hdr/s  30049+    0 Qed  #1053867    5/50 peers   10 MiB cache 25 MiB queue  RPC:  0 conn,  0 req/s,   0 µs
2017-09-26 10:23:24  Syncing #1055703 9dcb…765c   367 hdr/s  30001+    0 Qed  #1055703    4/50 peers   10 MiB cache 25 MiB queue  RPC:  0 conn,  0 req/s,   0 µs
2017-09-26 10:23:29  Syncing #1057460 07ca…a90f   350 hdr/s  30040+    0 Qed  #1057460    4/50 peers   10 MiB cache 25 MiB queue  RPC:  0 conn,  0 req/s,   0 µs
2017-09-26 10:23:34  Syncing #1059004 6015…35fd   308 hdr/s  30028+    0 Qed  #1059004    4/50 peers   10 MiB cache 25 MiB queue  RPC:  0 conn,  0 req/s,   0 µs
2017-09-26 10:23:39  Syncing #1060579 3af9…e2e8   315 hdr/s  29975+    0 Qed  #1060579    4/50 peers   10 MiB cache 25 MiB queue  RPC:  0 conn,  0 req/s,   0 µs
2017-09-26 10:23:44  Syncing #1062415 9369…3364   367 hdr/s  30076+    0 Qed  #1062415    4/50 peers   10 MiB cache 25 MiB queue  RPC:  0 conn,  0 req/s,   0 µs
2017-09-26 10:23:49  Syncing #1064215 4adf…a79c   360 hdr/s  30069+    0 Qed  #1064215    4/50 peers   10 MiB cache 25 MiB queue  RPC:  0 conn,  0 req/s,   0 µs
2017-09-26 10:23:54  Syncing #1065744 ee66…a090   305 hdr/s  29946+    0 Qed  #1065744    4/50 peers   10 MiB cache 25 MiB queue  RPC:  0 conn,  0 req/s,   0 µs
2017-09-26 10:23:59  Syncing #1067333 d80f…8e2f   317 hdr/s  30021+    0 Qed  #1067333    4/50 peers   10 MiB cache 25 MiB queue  RPC:  0 conn,  0 req/s,   0 µs
2017-09-26 10:24:04  Syncing #1068946 f54b…0aed   322 hdr/s  29945+    0 Qed  #1068946    4/50 peers   10 MiB cache 25 MiB queue  RPC:  0 conn,  0 req/s,   0 µs
2017-09-26 10:24:09  Syncing #1070651 59bf…3ab4   341 hdr/s  30034+    0 Qed  #1070651    4/50 peers   10 MiB cache 25 MiB queue  RPC:  0 conn,  0 req/s,   0 µs
2017-09-26 10:24:14  Syncing #1072198 5f48…4f7d   309 hdr/s  30018+    0 Qed  #1072198    5/50 peers   10 MiB cache 25 MiB queue  RPC:  0 conn,  0 req/s,   0 µs
2017-09-26 10:24:19  Syncing #1074067 bd40…d861   373 hdr/s  29944+    0 Qed  #1074067    4/50 peers   10 MiB cache 25 MiB queue  RPC:  0 conn,  0 req/s,   0 µs
2017-09-26 10:24:24  Syncing #1075814 7dca…9b40   349 hdr/s  29990+    0 Qed  #1075814    4/50 peers   10 MiB cache 25 MiB queue  RPC:  0 conn,  0 req/s,   0 µs
2017-09-26 10:24:29  Syncing #1077809 03ee…f706   398 hdr/s  30042+    0 Qed  #1077809    4/50 peers   10 MiB cache 25 MiB queue  RPC:  0 conn,  0 req/s,   0 µs
2017-09-26 10:24:34  Syncing #1079777 e742…c02a   392 hdr/s  29992+    0 Qed  #1079777    4/50 peers   10 MiB cache 25 MiB queue  RPC:  0 conn,  0 req/s,   0 µs
2017-09-26 10:24:39  Syncing #1081154 f9ea…61b9   275 hdr/s  30024+    0 Qed  #1081154    4/50 peers   10 MiB cache 25 MiB queue  RPC:  0 conn,  0 req/s,   0 µs
2017-09-26 10:24:44  Syncing #1083252 74d5…3c97   419 hdr/s  29721+    0 Qed  #1083252    4/50 peers   10 MiB cache 25 MiB queue  RPC:  0 conn,  0 req/s,   0 µs
2017-09-26 10:24:49  Syncing #1085284 673d…69c8   406 hdr/s  27685+    0 Qed  #1085284    4/50 peers   10 MiB cache 23 MiB queue  RPC:  0 conn,  0 req/s,   0 µs
2017-09-26 10:24:54  Syncing #1086918 d987…a6ec   326 hdr/s  26054+    0 Qed  #1086918    4/50 peers   10 MiB cache 22 MiB queue  RPC:  0 conn,  0 req/s,   0 µs
2017-09-26 10:24:59  Syncing #1088425 a47b…de0e   301 hdr/s  24546+    0 Qed  #1088425    4/50 peers   10 MiB cache 21 MiB queue  RPC:  0 conn,  0 req/s,   0 µs
2017-09-26 10:25:04  Syncing #1089938 debd…2fb3   302 hdr/s  23031+    0 Qed  #1089938    4/50 peers   10 MiB cache 19 MiB queue  RPC:  0 conn,  0 req/s,   0 µs
2017-09-26 10:25:09  Syncing #1091431 9cc4…3213   298 hdr/s  21542+    0 Qed  #1091431    4/50 peers   10 MiB cache 18 MiB queue  RPC:  0 conn,  0 req/s,   0 µs
2017-09-26 10:25:14  Syncing #1092861 1612…f8bf   285 hdr/s  20109+    0 Qed  #1092861    4/50 peers   10 MiB cache 17 MiB queue  RPC:  0 conn,  0 req/s,   0 µs
2017-09-26 10:25:19  Syncing #1094170 3e47…ca2d   261 hdr/s  18800+    0 Qed  #1094170    4/50 peers   10 MiB cache 16 MiB queue  RPC:  0 conn,  0 req/s,   0 µs
2017-09-26 10:25:24  Syncing #1095436 2c44…2111   252 hdr/s  17537+    0 Qed  #1095436    4/50 peers   10 MiB cache 15 MiB queue  RPC:  0 conn,  0 req/s,   0 µs
2017-09-26 10:25:29  Syncing #1096645 1be2…ee1f   241 hdr/s  16328+    0 Qed  #1096645    4/50 peers   10 MiB cache 14 MiB queue  RPC:  0 conn,  0 req/s,   0 µs
2017-09-26 10:25:34  Syncing #1097658 f587…0f45   202 hdr/s  15312+    0 Qed  #1097658    4/50 peers   10 MiB cache 13 MiB queue  RPC:  0 conn,  0 req/s,   0 µs
2017-09-26 10:25:39  Syncing #1098763 b015…9dad   220 hdr/s  14209+    0 Qed  #1098763    4/50 peers   10 MiB cache 12 MiB queue  RPC:  0 conn,  0 req/s,   0 µs
2017-09-26 10:25:44  Syncing #1099921 55b6…89b9   231 hdr/s  13052+    0 Qed  #1099921    4/50 peers   10 MiB cache 11 MiB queue  RPC:  0 conn,  0 req/s,   0 µs
2017-09-26 10:25:49  Syncing #1101119 cf75…163e   239 hdr/s  11854+    0 Qed  #1101119    4/50 peers   10 MiB cache 10 MiB queue  RPC:  0 conn,  0 req/s,   0 µs
2017-09-26 10:25:54  Syncing #1102190 9f8f…d8ed   213 hdr/s  10783+    0 Qed  #1102190    4/50 peers   10 MiB cache 9 MiB queue  RPC:  0 conn,  0 req/s,   0 µs
2017-09-26 10:25:59  Syncing #1103250 796a…85ad   211 hdr/s   9723+    1 Qed  #1103250    4/50 peers   10 MiB cache 8 MiB queue  RPC:  0 conn,  0 req/s,   0 µs
2017-09-26 10:26:04  Syncing #1104237 9f90…6314   197 hdr/s   8735+    0 Qed  #1104237    4/50 peers   10 MiB cache 7 MiB queue  RPC:  0 conn,  0 req/s,   0 µs
2017-09-26 10:26:09  Syncing #1105532 3868…662c   259 hdr/s   7441+    0 Qed  #1105532    4/50 peers   10 MiB cache 6 MiB queue  RPC:  0 conn,  0 req/s,   0 µs
2017-09-26 10:26:14  Syncing #1106587 0cf0…a7fe   210 hdr/s   6386+    0 Qed  #1106587    4/50 peers   10 MiB cache 5 MiB queue  RPC:  0 conn,  0 req/s,   0 µs
2017-09-26 10:26:19  Syncing #1107696 2b9a…2dd9   221 hdr/s   5276+    0 Qed  #1107696    6/50 peers   10 MiB cache 4 MiB queue  RPC:  0 conn,  0 req/s,   0 µs
2017-09-26 10:26:24  Syncing #1108686 5d1a…5bdd   197 hdr/s   4285+    0 Qed  #1108686    4/50 peers   10 MiB cache 4 MiB queue  RPC:  0 conn,  0 req/s,   0 µs
2017-09-26 10:26:29  Syncing #1109577 bab1…4d5a   178 hdr/s   3394+    0 Qed  #1109577    4/50 peers   10 MiB cache 3 MiB queue  RPC:  0 conn,  0 req/s,   0 µs
2017-09-26 10:26:34  Syncing #1110036 b816…c253    91 hdr/s   2934+    0 Qed  #1110036    4/50 peers   10 MiB cache 2 MiB queue  RPC:  0 conn,  0 req/s,   0 µs
2017-09-26 10:26:39  Syncing #1111164 f4ca…b1c1   225 hdr/s   1809+    0 Qed  #1111164    4/50 peers   10 MiB cache 2 MiB queue  RPC:  0 conn,  0 req/s,   0 µs
2017-09-26 10:26:44  Syncing #1112306 7782…5092   228 hdr/s    666+    0 Qed  #1112306    4/50 peers   10 MiB cache 576 KiB queue  RPC:  0 conn,  0 req/s,   0 µs
2017-09-26 10:26:49  Syncing #1112977 1af1…ce3c   134 hdr/s      0+    0 Qed  #1112977    4/50 peers   10 MiB cache 0 bytes queue  RPC:  0 conn,  0 req/s,   0 µs
2017-09-26 10:26:54  Syncing #1112977 1af1…ce3c     0 hdr/s      0+    0 Qed  #1112977    4/50 peers   10 MiB cache 0 bytes queue  RPC:  0 conn,  0 req/s,   0 µs
2017-09-26 10:26:59  Syncing #1112977 1af1…ce3c     0 hdr/s      0+    0 Qed  #1112977    4/50 peers   10 MiB cache 0 bytes queue  RPC:  0 conn,  0 req/s,   0 µs
2017-09-26 10:27:04  Syncing #1112977 1af1…ce3c     0 hdr/s      0+    0 Qed  #1112977    5/50 peers   10 MiB cache 0 bytes queue  RPC:  0 conn,  0 req/s,   0 µs
2017-09-26 10:27:09  Syncing #1112977 1af1…ce3c     0 hdr/s      0+    0 Qed  #1112977    4/50 peers   10 MiB cache 0 bytes queue  RPC:  0 conn,  0 req/s,   0 µs
2017-09-26 10:27:14  Syncing #1112977 1af1…ce3c     0 hdr/s      0+    0 Qed  #1112977    4/50 peers   10 MiB cache 0 bytes queue  RPC:  0 conn,  0 req/s,   0 µs
2017-09-26 10:27:19  Syncing #1112977 1af1…ce3c     0 hdr/s      0+    0 Qed  #1112977    4/50 peers   10 MiB cache 0 bytes queue  RPC:  0 conn,  0 req/s,   0 µs
2017-09-26 10:27:24  Syncing #1112977 1af1…ce3c     0 hdr/s      0+    0 Qed  #1112977    4/50 peers   10 MiB cache 0 bytes queue  RPC:  0 conn,  0 req/s,   0 µs
2017-09-26 10:27:29  Syncing #1112977 1af1…ce3c     0 hdr/s      0+    0 Qed  #1112977    4/50 peers   10 MiB cache 0 bytes queue  RPC:  0 conn,  0 req/s,   0 µs
2017-09-26 10:27:34  Syncing #1112977 1af1…ce3c     0 hdr/s      0+    0 Qed  #1112977    4/50 peers   10 MiB cache 0 bytes queue  RPC:  0 conn,  0 req/s,   0 µs
2017-09-26 10:27:39  Syncing #1112977 1af1…ce3c     0 hdr/s      0+    0 Qed  #1112977    4/50 peers   10 MiB cache 0 bytes queue  RPC:  0 conn,  0 req/s,   0 µs
2017-09-26 10:27:44  Syncing #1112977 1af1…ce3c     0 hdr/s      0+    0 Qed  #1112977    4/50 peers   10 MiB cache 0 bytes queue  RPC:  0 conn,  0 req/s,   0 µs
2017-09-26 10:27:49  Syncing #1112977 1af1…ce3c     0 hdr/s      0+    0 Qed  #1112977    4/50 peers   10 MiB cache 0 bytes queue  RPC:  0 conn,  0 req/s,   0 µs
2017-09-26 10:27:54  Syncing #1112977 1af1…ce3c     0 hdr/s      0+    0 Qed  #1112977    4/50 peers   10 MiB cache 0 bytes queue  RPC:  0 conn,  0 req/s,   0 µs
2017-09-26 10:27:59  Syncing #1112977 1af1…ce3c     0 hdr/s      0+    0 Qed  #1112977    4/50 peers   10 MiB cache 0 bytes queue  RPC:  0 conn,  0 req/s,   0 µs
2017-09-26 10:28:04  Syncing #1112977 1af1…ce3c     0 hdr/s      0+    0 Qed  #1112977    4/50 peers   10 MiB cache 0 bytes queue  RPC:  0 conn,  0 req/s,   0 µs
2017-09-26 10:28:09  Syncing #1112977 1af1…ce3c     0 hdr/s      0+    0 Qed  #1112977    4/50 peers   10 MiB cache 0 bytes queue  RPC:  0 conn,  0 req/s,   0 µs
^C
0 ✓ user@eros ~ $  ~/.opt/parity/target/release/parity --light --base-path /home/user/.local/share/io.parity.ethereum-08 --chain musicoin --ports-shift 830 --reserved-peers ~/Desktop/reserved-smc.txt 
2017-09-26 10:31:19  Starting Parity/v1.8.0-unstable-7940bf6ec-20170921/x86_64-linux-gnu/rustc1.19.0
2017-09-26 10:31:19  Keys path /home/user/.local/share/io.parity.ethereum-08/keys/Musicoin
2017-09-26 10:31:19  DB path /home/user/.local/share/io.parity.ethereum-08/chains/Musicoin/db/a9974ec0e92bf923
2017-09-26 10:31:19  Path to dapps /home/user/.local/share/io.parity.ethereum-08/dapps
2017-09-26 10:31:19  Running in experimental Light Client mode.
2017-09-26 10:31:25  Public node URL: enode://54993a439d6ecc96c7724111dba9e45a2dba3e9a9f44bad45bcb1acae780878b1192983e4d33a211f5025d9f48c0f32f7b88e6cf9fcbddf8d6caac0085e4daac@172.16.16.11:31133
2017-09-26 10:31:25  Syncing #1113925 6ae3…2a05   189 hdr/s   4945+    0 Qed  #1113925    4/50 peers   615 KiB cache 4 MiB queue  RPC:  0 conn,  0 req/s,   0 µs
2017-09-26 10:31:30  Syncing #1115041 5491…cb4a   222 hdr/s   3831+    0 Qed  #1115041    5/50 peers   1 MiB cache 3 MiB queue  RPC:  0 conn,  0 req/s,   0 µs
2017-09-26 10:31:35  Syncing #1116472 6c22…7d0d   286 hdr/s   2402+    0 Qed  #1116472    5/50 peers   2 MiB cache 2 MiB queue  RPC:  0 conn,  0 req/s,   0 µs
2017-09-26 10:31:40  Syncing #1117889 5a2a…8b15   283 hdr/s    987+    0 Qed  #1117889    5/50 peers   3 MiB cache 851 KiB queue  RPC:  0 conn,  0 req/s,   0 µs
2017-09-26 10:32:10     4/50 peers   4 MiB cache 0 bytes queue  RPC:  0 conn,  0 req/s,   0 µs
2017-09-26 10:32:40     4/50 peers   4 MiB cache 0 bytes queue  RPC:  0 conn,  0 req/s,   0 µs
2017-09-26 10:33:10     4/50 peers   4 MiB cache 0 bytes queue  RPC:  0 conn,  0 req/s,   0 µs
2017-09-26 10:33:40     4/50 peers   4 MiB cache 0 bytes queue  RPC:  0 conn,  0 req/s,   0 µs
2017-09-26 10:34:10     4/50 peers   4 MiB cache 0 bytes queue  RPC:  0 conn,  0 req/s,   0 µs
2017-09-26 10:34:40     4/50 peers   4 MiB cache 0 bytes queue  RPC:  0 conn,  0 req/s,   0 µs
2017-09-26 10:35:10     4/50 peers   4 MiB cache 0 bytes queue  RPC:  0 conn,  0 req/s,   0 µs
2017-09-26 10:35:40     1/50 peers   4 MiB cache 0 bytes queue  RPC:  0 conn,  0 req/s,   0 µs
2017-09-26 10:36:10     1/50 peers   4 MiB cache 0 bytes queue  RPC:  0 conn,  0 req/s,   0 µs

Edit: Just finished a light sync on expanse without any issues.

[5chdn]

Very interesting, now being aware of the credits, I just managed to get a stuck foundation light-sync to continue after changing the --node-key

2017-09-26 10:46:12  Syncing #2120393 b092…e206   483 hdr/s  28094+    0 Qed  #2120393   21/50 peers   10 MiB cache 24 MiB queue  RPC:  0 conn,  0 req/s,   0 µs
2017-09-26 10:46:17  Syncing #2123054 c757…f8df   532 hdr/s  27867+    0 Qed  #2123054   21/50 peers   10 MiB cache 23 MiB queue  RPC:  0 conn,  0 req/s,   0 µs
2017-09-26 10:46:22  Syncing #2127429 0b17…3df8   875 hdr/s  30018+    0 Qed  #2127429   21/50 peers   10 MiB cache 25 MiB queue  RPC:  0 conn,  0 req/s,   0 µs
2017-09-26 10:46:27  Syncing #2131181 4d1b…0b5a   750 hdr/s  29596+    0 Qed  #2131181   21/50 peers   10 MiB cache 25 MiB queue  RPC:  0 conn,  0 req/s,   0 µs
2017-09-26 10:46:32  Syncing #2135728 c25d…2cba   909 hdr/s  26327+    0 Qed  #2135728   21/50 peers   10 MiB cache 22 MiB queue  RPC:  0 conn,  0 req/s,   0 µs
2017-09-26 10:46:37  Syncing #2139740 ad01…e10c   802 hdr/s  29869+    0 Qed  #2139740   21/50 peers   10 MiB cache 25 MiB queue  RPC:  0 conn,  0 req/s,   0 µs
2017-09-26 10:46:42  Syncing #2143242 e435…a6b5   700 hdr/s  29183+    0 Qed  #2143242   20/50 peers   10 MiB cache 24 MiB queue  RPC:  0 conn,  0 req/s,   0 µs
2017-09-26 10:46:47  Syncing #2145662 c601…5103   484 hdr/s  28171+    0 Qed  #2145662   20/50 peers   10 MiB cache 24 MiB queue  RPC:  0 conn,  0 req/s,   0 µs
2017-09-26 10:46:52  Syncing #2148678 cd3f…260c   603 hdr/s  28227+    0 Qed  #2148678   20/50 peers   10 MiB cache 24 MiB queue  RPC:  0 conn,  0 req/s,   0 µs
2017-09-26 10:46:57  Syncing #2152331 f85c…6108   730 hdr/s  28798+    0 Qed  #2152331   20/50 peers   10 MiB cache 24 MiB queue  RPC:  0 conn,  0 req/s,   0 µs
2017-09-26 10:47:02  Syncing #2155526 48cf…88e9   639 hdr/s  29955+    0 Qed  #2155526   20/50 peers   10 MiB cache 25 MiB queue  RPC:  0 conn,  0 req/s,   0 µs
2017-09-26 10:47:07  Syncing #2159971 3949…3991   889 hdr/s  26406+    0 Qed  #2159971   20/50 peers   10 MiB cache 22 MiB queue  RPC:  0 conn,  0 req/s,   0 µs
2017-09-26 10:47:12  Syncing #2163294 82af…c189   664 hdr/s  23080+    0 Qed  #2163294   18/50 peers   10 MiB cache 19 MiB queue  RPC:  0 conn,  0 req/s,   0 µs
2017-09-26 10:47:17  Syncing #2166480 399b…1dbb   637 hdr/s  19896+    0 Qed  #2166480   18/50 peers   10 MiB cache 17 MiB queue  RPC:  0 conn,  0 req/s,   0 µs
2017-09-26 10:47:22  Syncing #2169538 0da2…cab8   611 hdr/s  16841+    0 Qed  #2169538   18/50 peers   10 MiB cache 14 MiB queue  RPC:  0 conn,  0 req/s,   0 µs
2017-09-26 10:47:27  Syncing #2173759 b112…e650   844 hdr/s  12619+    0 Qed  #2173759   18/50 peers   10 MiB cache 11 MiB queue  RPC:  0 conn,  0 req/s,   0 µs
2017-09-26 10:47:32  Syncing #2178453 cdb1…4718   938 hdr/s   7925+    0 Qed  #2178453   18/50 peers   10 MiB cache 7 MiB queue  RPC:  0 conn,  0 req/s,   0 µs
2017-09-26 10:47:37  Syncing #2183165 db03…4546   942 hdr/s   3213+    0 Qed  #2183165   18/50 peers   10 MiB cache 3 MiB queue  RPC:  0 conn,  0 req/s,   0 µs
2017-09-26 10:47:42  Syncing #2186382 6843…e47c   643 hdr/s      0+    0 Qed  #2186382   18/50 peers   10 MiB cache 0 bytes queue  RPC:  0 conn,  0 req/s,   0 µs
2017-09-26 10:47:47  Syncing #2186382 6843…e47c     0 hdr/s      0+    0 Qed  #2186382   19/50 peers   10 MiB cache 0 bytes queue  RPC:  0 conn,  0 req/s,   0 µs
2017-09-26 10:47:57  Syncing #2186382 6843…e47c     0 hdr/s      0+    0 Qed  #2186382   19/50 peers   10 MiB cache 0 bytes queue  RPC:  0 conn,  0 req/s,   0 µs
2017-09-26 10:48:02  Syncing #2186382 6843…e47c     0 hdr/s      0+    0 Qed  #2186382   19/50 peers   10 MiB cache 0 bytes queue  RPC:  0 conn,  0 req/s,   0 µs
2017-09-26 10:48:07  Syncing #2186382 6843…e47c     0 hdr/s      0+    0 Qed  #2186382   19/50 peers   10 MiB cache 0 bytes queue  RPC:  0 conn,  0 req/s,   0 µs
2017-09-26 10:48:12  Syncing #2186382 6843…e47c     0 hdr/s      0+    0 Qed  #2186382   19/50 peers   10 MiB cache 0 bytes queue  RPC:  0 conn,  0 req/s,   0 µs
2017-09-26 10:48:17  Syncing #2186382 6843…e47c     0 hdr/s      0+    0 Qed  #2186382   19/50 peers   10 MiB cache 0 bytes queue  RPC:  0 conn,  0 req/s,   0 µs
2017-09-26 10:48:22  Syncing #2186382 6843…e47c     0 hdr/s      0+    0 Qed  #2186382   19/50 peers   10 MiB cache 0 bytes queue  RPC:  0 conn,  0 req/s,   0 µs
2017-09-26 10:48:27  Syncing #2186382 6843…e47c     0 hdr/s      0+    0 Qed  #2186382   19/50 peers   10 MiB cache 0 bytes queue  RPC:  0 conn,  0 req/s,   0 µs
2017-09-26 10:48:32  Syncing #2186382 6843…e47c     0 hdr/s      0+    0 Qed  #2186382   19/50 peers   10 MiB cache 0 bytes queue  RPC:  0 conn,  0 req/s,   0 µs
2017-09-26 10:48:37  Syncing #2186382 6843…e47c     0 hdr/s      0+    0 Qed  #2186382   19/50 peers   10 MiB cache 0 bytes queue  RPC:  0 conn,  0 req/s,   0 µs
2017-09-26 10:48:42  Syncing #2186382 6843…e47c     0 hdr/s      0+    0 Qed  #2186382   19/50 peers   10 MiB cache 0 bytes queue  RPC:  0 conn,  0 req/s,   0 µs
2017-09-26 10:48:47  Syncing #2186382 6843…e47c     0 hdr/s      0+    0 Qed  #2186382   19/50 peers   10 MiB cache 0 bytes queue  RPC:  0 conn,  0 req/s,   0 µs
2017-09-26 10:48:52  Syncing #2186382 6843…e47c     0 hdr/s      0+    0 Qed  #2186382   19/50 peers   10 MiB cache 0 bytes queue  RPC:  0 conn,  0 req/s,   0 µs
2017-09-26 10:48:57  Syncing #2186382 6843…e47c     0 hdr/s      0+    0 Qed  #2186382   19/50 peers   10 MiB cache 0 bytes queue  RPC:  0 conn,  0 req/s,   0 µs
2017-09-26 10:49:02  Syncing #2186382 6843…e47c     0 hdr/s      0+    0 Qed  #2186382   19/50 peers   10 MiB cache 0 bytes queue  RPC:  0 conn,  0 req/s,   0 µs
2017-09-26 10:49:07  Syncing #2186382 6843…e47c     0 hdr/s      0+    0 Qed  #2186382   19/50 peers   10 MiB cache 0 bytes queue  RPC:  0 conn,  0 req/s,   0 µs
2017-09-26 10:49:12  Syncing #2186382 6843…e47c     0 hdr/s      0+    0 Qed  #2186382   19/50 peers   10 MiB cache 0 bytes queue  RPC:  0 conn,  0 req/s,   0 µs
2017-09-26 10:49:17  Syncing #2186382 6843…e47c     0 hdr/s      0+    0 Qed  #2186382   19/50 peers   10 MiB cache 0 bytes queue  RPC:  0 conn,  0 req/s,   0 µs
^C0 ✓ user@eros ~ $  ~/.opt/parity/target/release/parity --light --base-path /home/user/.local/share/io.parity.ethereum-08 --ports-shift 800 --node-key randomasdfstring
2017-09-26 10:50:01  Starting Parity/v1.8.0-unstable-7940bf6ec-20170921/x86_64-linux-gnu/rustc1.19.0
2017-09-26 10:50:01  Keys path /home/user/.local/share/io.parity.ethereum-08/keys/Foundation
2017-09-26 10:50:01  DB path /home/user/.local/share/io.parity.ethereum-08/chains/ethereum/db/906a34e69aec8c0d
2017-09-26 10:50:01  Path to dapps /home/user/.local/share/io.parity.ethereum-08/dapps
2017-09-26 10:50:01  Running in experimental Light Client mode.
2017-09-26 10:50:06  Public node URL: enode://726ade9e6d43b7c07b31bc03cd92128b63387c5b085e229516d9aaf78a3081b664ff80d0786f2566d9aae254653a43ff765a9ab710eb64fde765d82cff2d850c@172.16.16.11:31103
2017-09-26 10:50:06  Syncing #2186382 6843…e47c     0 hdr/s      0+    0 Qed  #2186382   12/50 peers   664 bytes cache 0 bytes queue  RPC:  0 conn,  0 req/s,   0 µs
2017-09-26 10:50:11  Syncing #2186382 6843…e47c     0 hdr/s      0+    0 Qed  #2186382   14/50 peers   664 bytes cache 0 bytes queue  RPC:  0 conn,  0 req/s,   0 µs
2017-09-26 10:50:16  Syncing #2186382 6843…e47c     0 hdr/s      0+    0 Qed  #2186382   16/50 peers   664 bytes cache 0 bytes queue  RPC:  0 conn,  0 req/s,   0 µs
2017-09-26 10:50:21  Syncing #2186382 6843…e47c     0 hdr/s      0+    0 Qed  #2186382   16/50 peers   664 bytes cache 0 bytes queue  RPC:  0 conn,  0 req/s,   0 µs
2017-09-26 10:50:26  Syncing #2186382 6843…e47c     0 hdr/s      0+    0 Qed  #2186382   14/50 peers   664 bytes cache 0 bytes queue  RPC:  0 conn,  0 req/s,   0 µs
^C0 ✓ user@eros ~ $  ~/.opt/parity/target/release/parity --light --base-path /home/user/.local/share/io.parity.ethereum-08 --ports-shift 800 --node-key evenmorerandomasdfstring
2017-09-26 10:50:34  Starting Parity/v1.8.0-unstable-7940bf6ec-20170921/x86_64-linux-gnu/rustc1.19.0
2017-09-26 10:50:34  Keys path /home/user/.local/share/io.parity.ethereum-08/keys/Foundation
2017-09-26 10:50:34  DB path /home/user/.local/share/io.parity.ethereum-08/chains/ethereum/db/906a34e69aec8c0d
2017-09-26 10:50:34  Path to dapps /home/user/.local/share/io.parity.ethereum-08/dapps
2017-09-26 10:50:34  Running in experimental Light Client mode.
2017-09-26 10:50:40  Syncing #2186382 6843…e47c     0 hdr/s      0+    0 Qed  #2186382   13/50 peers   664 bytes cache 0 bytes queue  RPC:  0 conn,  0 req/s,   0 µs
2017-09-26 10:50:40  Public node URL: enode://4f0a5eb831d268beeb3a5fcaff12523f3f95591c44152877a4b95169229691e8bd392045c671c08751e3f0c1d68e1f38deda4afb16936083d518deb440abbc87@172.16.16.11:31103
2017-09-26 10:50:45  Syncing #2187366 ca7e…8029   196 hdr/s   3109+    0 Qed  #2187366   16/50 peers   639 KiB cache 3 MiB queue  RPC:  0 conn,  0 req/s,   0 µs
2017-09-26 10:50:55  Syncing #2189750 96e0…a890   239 hdr/s  23508+    0 Qed  #2189750   16/50 peers   2 MiB cache 20 MiB queue  RPC:  0 conn,  0 req/s,   0 µs
2017-09-26 10:51:00  Syncing #2190070 a567…948e    64 hdr/s  30098+    0 Qed  #2190070   15/50 peers   2 MiB cache 25 MiB queue  RPC:  0 conn,  0 req/s,   0 µs
2017-09-26 10:51:05  Syncing #2191324 f3a3…b8d0   250 hdr/s  29997+    0 Qed  #2191324   15/50 peers   3 MiB cache 25 MiB queue  RPC:  0 conn,  0 req/s,   0 µs
2017-09-26 10:51:10  Syncing #2192465 68d6…49c9   228 hdr/s  30009+    0 Qed  #2192465   16/50 peers   4 MiB cache 25 MiB queue  RPC:  0 conn,  0 req/s,   0 µs

Edit, might have been a coincidence, it's stuck again.

[WyseNynja]

I think we should add more verbose logging when credits run out along with a countdown for when we will retry. Then users like me will know to just be patient instead of thinking something is actually broken. Hopefully more peers that serve light clients will join the network. Is there an open issue tracking better peer discovery?

On a related note (maybe this is what https://github.com/paritytech/parity/issues/6010 is about), given that I already have a fully synced node, I don't really want to waste time validating any headers on my laptop. Is there some way to skip to a known good header? For example, my archival node has #4314162 8649…1a5e so I might as well start as close to there as I can. If I could do that, the light node wouldn't need to use so many credits fetching old headers and would be a much lighter load on the network.

[5chdn]

Providing my own archive node via reserved peers helps to get the light client synced and gives me some control over "credits" (at least it feels like it does, not sure how they work). I'm now at block 3.7m with the light client on foundation.

[jeremie-H]

hello ! same problem here +1
Parity/v1.8.0-beta-9882902-20171015/x86_64-linux-gnu/rustc1.20.0
Running in experimental Light Client mode.

[tzapu]

same here v1.7.7, managed to get up to block 2.8mil ...

[foglerek]

Same problem here - I'm using Parity/v1.9.0-nightly-ffee6aa-20171103/x86_64-macos/rustc1.21.0.
Stuck at this message:

2017-11-08 20:04:45  Syncing #2545959 7242…61b0     0 hdr/s      0+    0 Qed  #2545959   17/50 peers   664 bytes cache 0 bytes queue  RPC:  1 conn,  0 req/s, 121 µs

I'm running parity --light.

[michwill]

+1 here. Stuck at 2023711. Parity version is 1.8.3

[rstormsf]

the same here, got stuck on light client

[michwill]

Eventually it will get unstuck and continue, it appears

[keo]

same here, gets stuck... Sometimes I am able to get it running again by restarting the process but then after a few restarts it stops syncing again....

[brandoncurtis]

I was having this problem intermittently when trying to sync both the Kovan and Mainnet chains using parity --light. Since it was announced that everyone needs to update their Parity Kovan nodes for tomorrow's hard fork, the problem has disappeared on Parity. It persists with Mainnet light nodes unless I provide the light node with a list of known-good fully-updated Parity full nodes using --reserved-peers FILE --reserved-only.

This suggests to me that the problem is related to a lack of full nodes willing to sync Parity light clients and/or deficiencies in a Parity light client's ability to manage its connections to ensure that it only connects to full nodes that are willing to play ball. For a Parity Mainnet light client this might be especially challenging, because Geth is running Light Ethereum Subprotocol v2 (LESv2), so the universe of compatible LESv1-friendly full nodes might be fairly small.

Geth has geth --lightserv, which allows a full node to decide how much time it wants to spend serving light clients. Does Parity have anything like this? Is it hardcoded, and if so at what value? What Parity versions are willing and able to serve to light nodes?

[rphmeier]

@brandoncurtis exactly. Most of these "sync stuck" reports are simply due to having only a single serving peer which rate-limits the client. Right now the amount of time servers are willing to serve light clients is hardcoded but the machinery exists for it to be configurable.

Parity 1.7 and 1.8 should be serving light nodes

[atx]

Is there any recommended workaround for this issue at the moment? I tried adding a bunch of random Parity>=1.7 nodes to my reserved peers list, but it doesn't seem to help all that much (or maybe at all). Increasing the min-peers count also does not lead to any improvement.

[eldoy]

Same thing happens here. And normal warp does not fetch any snapshots. Been trying to sync for 5 days now.

[Trophonix]

Same issue as @fugroup

[eldoy]

I ended up using geth and mist instead of parity, with the --fast option and --cache 512, synced in about 15 hours, 60 GB disk space used. Use an SSD disk or it will not work. The chain data count reached about 50 million. Light mode neither worked for geth nor parity, not enough peers.

[suspended]

Same problem. Syncs for a while then stalls.

[tomaka]

PR #7848 considerably reduces the chances of sync being stuck. However I've noticed two other causes for this issue:

• For some reason sometimes the sync is just veeeery slow. I've uploaded the logs, and as you can see we continuously receive headers even though we're at 0 hdr/sec. I don't really have an explanation for that. It looks like the sync is stuck, but given enough time it should successfully continue.

• Sometimes we are stuck in the AncestorSearch::Prehistoric state. This happened to me once, after which I added more debugging instructions in order to get a better diagnostic. Unfortunately I haven't been able to reproduce since then.

[tomaka]

For reason #1 (with the logs I uploaded), sync always seems to resume after a while.
Here are other example logs.

[rphmeier]

Sometimes we are stuck in the AncestorSearch::Prehistoric state

For now it should disconnect any peers which have prehistoric common ancestor, perhaps validated when first connecting. It's possible that we end up connected to a peer with the same genesis but different head (i.e. ETC vs ETH) which then causes us to discover and connect to more peers with the same incompatibility.

[makeworld-the-better-one]

I'm still getting this, what's the fix?

Edit: restarting it has worked, so far. I'll update if it changes again.

Edit 2: it happened again at a later block and restarting won't fix it.

[makeworld-the-better-one]

I rebooted and it's syncing again. I'll see how long it lasts.

Edit: It stopped and I had to restart again. This will probably work in the end, but it's getting tedious. Why does this happen?

[Tbaut]

@rphmeier @tomaka I could reproduce the reason 2 (AncestorSearch::Prehistoric state) with kovan. See issue here : https://github.com/paritytech/parity/issues/8383

[tomaka]

The problem with this issue is that on my machine it happens only once every 10 hours or so, which makes debugging it very difficult. If you have a reproducible case, then it's very helpful.

[Tbaut]

@tomaka did you try on kovan too? It happens very very often for me (~15min) on kovan.
Here some logs

[ilhanu]

I'm having the same issue on foundation:

2018-04-25 14:51:35  Starting Parity/v1.10.2-beta-f4ae813fd-20180423/x86_64-windows-msvc/rustc1.25.0
2018-04-25 14:51:35  Running in experimental Light Client mode.
2018-04-25 14:51:36  Multi-threaded server is not available on Windows. Falling back to single thread.
2018-04-25 14:51:36  Multi-threaded server is not available on Windows. Falling back to single thread.
2018-04-25 14:51:41  Public node URL: enode://85be716e31c9626286c4dd7bbc89d48238608414543c8a4d09d63351bcddf42b25b36c1091391d3f1c36ceb9af297763a6e9c4840eb772f44803fd53b8dc54aa@127.0.0.1:30303
2018-04-25 14:51:41  Syncing #3089551 7383…4208     0 hdr/s      0+    0 Qed  #3089551   20/50 peers   554 bytes cache  0 bytes queue  RPC:  0 conn,  0 req/s,   0 µs
2018-04-25 14:51:46  Syncing #3089551 7383…4208     0 hdr/s      0+    0 Qed  #3089551   25/50 peers   554 bytes cache  0 bytes queue  RPC:  0 conn,  0 req/s,   0 µs
2018-04-25 14:51:51  Syncing #3089551 7383…4208     0 hdr/s      0+    0 Qed  #3089551   18/50 peers   554 bytes cache  0 bytes queue  RPC:  0 conn,  0 req/s,   0 µs
2018-04-25 14:51:56  Syncing #3089551 7383…4208     0 hdr/s      0+    0 Qed  #3089551   15/50 peers   554 bytes cache  0 bytes queue  RPC:  0 conn,  0 req/s,   0 µs
2018-04-25 14:52:01  Syncing #3089551 7383…4208     0 hdr/s      0+    0 Qed  #3089551   22/50 peers   554 bytes cache  0 bytes queue  RPC:  0 conn,  0 req/s,   0 µs
2018-04-25 14:52:06  Syncing #3089551 7383…4208     0 hdr/s      0+    0 Qed  #3089551   23/50 peers   554 bytes cache  0 bytes queue  RPC:  0 conn,  0 req/s,   0 µs
2018-04-25 14:52:11  Syncing #3089551 7383…4208     0 hdr/s      0+    0 Qed  #3089551   20/50 peers   554 bytes cache  0 bytes queue  RPC:  0 conn,  0 req/s,   0 µs
2018-04-25 14:52:16  Syncing #3089551 7383…4208     0 hdr/s      0+    0 Qed  #3089551   25/50 peers   554 bytes cache  0 bytes queue  RPC:  0 conn,  0 req/s,   0 µs
2018-04-25 14:52:21  Syncing #3089551 7383…4208     0 hdr/s      0+    0 Qed  #3089551   25/50 peers   554 bytes cache  0 bytes queue  RPC:  0 conn,  0 req/s,   0 µs
2018-04-25 14:52:26  Syncing #3089551 7383…4208     0 hdr/s      0+    0 Qed  #3089551   23/50 peers   554 bytes cache  0 bytes queue  RPC:  0 conn,  0 req/s,   0 µs
2018-04-25 14:52:31  Syncing #3089551 7383…4208     0 hdr/s      0+    0 Qed  #3089551   20/50 peers   554 bytes cache  0 bytes queue  RPC:  0 conn,  0 req/s,   0 µs
2018-04-25 14:52:36  Syncing #3089551 7383…4208     0 hdr/s      0+    0 Qed  #3089551   25/50 peers   554 bytes cache  0 bytes queue  RPC:  0 conn,  0 req/s,   0 µs
2018-04-25 14:52:41  Syncing #3089551 7383…4208     0 hdr/s      0+    0 Qed  #3089551   26/50 peers   554 bytes cache  0 bytes queue  RPC:  0 conn,  0 req/s,   0 µs
2018-04-25 14:52:46  Syncing #3089551 7383…4208     0 hdr/s      0+    0 Qed  #3089551   21/50 peers   554 bytes cache  0 bytes queue  RPC:  0 conn,  0 req/s,   0 µs
2018-04-25 14:52:51  Syncing #3089551 7383…4208     0 hdr/s      0+    0 Qed  #3089551   20/50 peers   554 bytes cache  0 bytes queue  RPC:  0 conn,  0 req/s,   0 µs
2018-04-25 14:52:56  Syncing #3089551 7383…4208     0 hdr/s      0+    0 Qed  #3089551   25/50 peers   554 bytes cache  0 bytes queue  RPC:  0 conn,  0 req/s,   0 µs
2018-04-25 14:53:01  Syncing #3089551 7383…4208     0 hdr/s      0+    0 Qed  #3089551   25/50 peers   554 bytes cache  0 bytes queue  RPC:  0 conn,  0 req/s,   0 µs
2018-04-25 14:53:06  Syncing #3089551 7383…4208     0 hdr/s      0+    0 Qed  #3089551   20/50 peers   554 bytes cache  0 bytes queue  RPC:  0 conn,  0 req/s,   0 µs
2018-04-25 14:53:11  Syncing #3089551 7383…4208     0 hdr/s      0+    0 Qed  #3089551   25/50 peers   554 bytes cache  0 bytes queue  RPC:  0 conn,  0 req/s,   0 µs
2018-04-25 14:53:16  Syncing #3089551 7383…4208     0 hdr/s      0+    0 Qed  #3089551   25/50 peers   554 bytes cache  0 bytes queue  RPC:  0 conn,  0 req/s,   0 µs
2018-04-25 14:53:21  Syncing #3089551 7383…4208     0 hdr/s      0+    0 Qed  #3089551   22/50 peers   554 bytes cache  0 bytes queue  RPC:  0 conn,  0 req/s,   0 µs
2018-04-25 14:53:26  Syncing #3089551 7383…4208     0 hdr/s      0+    0 Qed  #3089551   25/50 peers   554 bytes cache  0 bytes queue  RPC:  0 conn,  0 req/s,   0 µs
2018-04-25 14:53:31  Syncing #3089551 7383…4208     0 hdr/s      0+    0 Qed  #3089551   25/50 peers   554 bytes cache  0 bytes queue  RPC:  0 conn,  0 req/s,   0 µs
2018-04-25 14:53:36  Syncing #3089551 7383…4208     0 hdr/s      0+    0 Qed  #3089551   20/50 peers   554 bytes cache  0 bytes queue  RPC:  0 conn,  0 req/s,   0 µs
2018-04-25 14:53:41  Syncing #3089551 7383…4208     0 hdr/s      0+    0 Qed  #3089551   19/50 peers   554 bytes cache  0 bytes queue  RPC:  0 conn,  0 req/s,   0 µs
2018-04-25 14:54:48  Syncing #3089551 7383…4208     0 hdr/s      0+    0 Qed  #3089551   24/50 peers   554 bytes cache  0 bytes queue  RPC:  0 conn,  0 req/s,   0 µs
2018-04-25 14:54:56  Syncing #3089551 7383…4208     0 hdr/s      0+    0 Qed  #3089551   26/50 peers   554 bytes cache  0 bytes queue  RPC:  0 conn,  0 req/s,   0 µs
2018-04-25 14:55:02  Syncing #3089551 7383…4208     0 hdr/s      0+    0 Qed  #3089551   20/50 peers   554 bytes cache  0 bytes queue  RPC:  0 conn,  0 req/s,   0 µs
2018-04-25 14:55:07  Syncing #3089551 7383…4208     0 hdr/s      0+    0 Qed  #3089551   25/50 peers   554 bytes cache  0 bytes queue  RPC:  0 conn,  0 req/s,   0 µs
2018-04-25 14:55:12  Syncing #3089551 7383…4208     0 hdr/s      0+    0 Qed  #3089551   25/50 peers   554 bytes cache  0 bytes queue  RPC:  0 conn,  0 req/s,   0 µs
2018-04-25 14:55:17  Syncing #3089551 7383…4208     0 hdr/s      0+    0 Qed  #3089551   25/50 peers   554 bytes cache  0 bytes queue  RPC:  0 conn,  0 req/s,   0 µs
2018-04-25 14:55:22  Syncing #3089551 7383…4208     0 hdr/s      0+    0 Qed  #3089551   20/50 peers   554 bytes cache  0 bytes queue  RPC:  0 conn,  0 req/s,   0 µs
2018-04-25 14:55:27  Syncing #3089551 7383…4208     0 hdr/s      0+    0 Qed  #3089551   25/50 peers   554 bytes cache  0 bytes queue  RPC:  0 conn,  0 req/s,   0 µs
2018-04-25 14:55:32  Syncing #3089551 7383…4208     0 hdr/s      0+    0 Qed  #3089551   25/50 peers   554 bytes cache  0 bytes queue  RPC:  0 conn,  0 req/s,   0 µs
2018-04-25 14:55:37  Syncing #3089551 7383…4208     0 hdr/s      0+    0 Qed  #3089551   26/50 peers   554 bytes cache  0 bytes queue  RPC:  0 conn,  0 req/s,   0 µs
2018-04-25 14:55:42  Syncing #3089551 7383…4208     0 hdr/s      0+    0 Qed  #3089551   20/50 peers   554 bytes cache  0 bytes queue  RPC:  0 conn,  0 req/s,   0 µs
2018-04-25 14:55:47  Syncing #3089551 7383…4208     0 hdr/s      0+    0 Qed  #3089551   25/50 peers   554 bytes cache  0 bytes queue  RPC:  0 conn,  0 req/s,   0 µs
2018-04-25 14:55:52  Syncing #3089551 7383…4208     0 hdr/s      0+    0 Qed  #3089551   25/50 peers   554 bytes cache  0 bytes queue  RPC:  0 conn,  0 req/s,   0 µs

Is there a workaround for this problem ?

[Tbaut]

@ilhanu the workaround for mainnet is to use v1.11 that will be released soon (here). Right now you can build it yourself from the source. The v1.11 uses hardcoded block headers that prevents you from having to download them.

[5chdn]

There are also binaries for 1.11 if you want to test light sync before it is actually released.

[ilhanu]

v1.11 doesn't change much, I deleted the cache folder in 1.10 and started anew.

Here you can see the output with 1.11 - binary I downloaded from sources of @5chdn

C:\Program Files\Parity Technologies\Parity>parity --light
2018-04-25 16:01:53  Starting Parity/v1.11.0-nightly-baeda9347-20180424/x86_64-windows-msvc/rustc1.25.0
2018-04-25 16:01:53  Running in experimental Light Client mode.
2018-04-25 16:01:54  Multi-threaded server is not available on Windows. Falling back to single thread.
2018-04-25 16:01:54  Multi-threaded server is not available on Windows. Falling back to single thread.
2018-04-25 16:01:58  Public node URL: enode://85be716e31c9626286c4dd7bbc89d48238608414543c8a4d09d63351bcddf42b25b36c1091391d3f1c36ceb9af297763a6e9c4840eb772f44803fd53b8dc54aa@127.0.0.1:30303
2018-04-25 16:02:04  Syncing #3469376 0x25bc…0acc   880 hdr/s  30085+    0 Qed  #3469376    8/50 peers      5 MiB cache   22 MiB queue  RPC:  0 conn,  0 req/s,   0 µs
2018-04-25 16:02:09  Syncing #3477307 0xdb96…8483  1576 hdr/s  29704+    4 Qed  #3477307    8/50 peers      9 MiB cache   22 MiB queue  RPC:  0 conn,  0 req/s,   0 µs
2018-04-25 16:02:14  Syncing #3482037 0x8eaf…c9c5   941 hdr/s  29574+   14 Qed  #3482037    8/50 peers     10 MiB cache   22 MiB queue  RPC:  0 conn,  0 req/s,   0 µs
2018-04-25 16:02:19  Syncing #3489835 0xac37…6dac  1549 hdr/s  29572+    0 Qed  #3489835   10/50 peers     10 MiB cache   22 MiB queue  RPC:  0 conn,  0 req/s,   0 µs
2018-04-25 16:02:24  Syncing #3497524 0xf2cf…b8bb  1537 hdr/s  28288+   23 Qed  #3497524    7/50 peers     10 MiB cache   21 MiB queue  RPC:  0 conn,  0 req/s,   0 µs
2018-04-25 16:02:29  Syncing #3504674 0x0c75…6011  1421 hdr/s  29982+    0 Qed  #3504674    3/50 peers     10 MiB cache   22 MiB queue  RPC:  0 conn,  0 req/s,   0 µs
2018-04-25 16:02:34  Syncing #3509999 0x6374…585e  1064 hdr/s  30042+    0 Qed  #3509999    6/50 peers     10 MiB cache   22 MiB queue  RPC:  0 conn,  0 req/s,   0 µs
2018-04-25 16:02:34  Error removing stale DAG cache: Os { code: 5, kind: PermissionDenied, message: "Access is denied." }
2018-04-25 16:02:39  Syncing #3516839 0x2231…c547  1359 hdr/s  29465+    0 Qed  #3516839    5/50 peers     10 MiB cache   22 MiB queue  RPC:  0 conn,  0 req/s,   0 µs
2018-04-25 16:02:44  Syncing #3524414 0x142a…5747  1509 hdr/s  29320+    4 Qed  #3524414    6/50 peers     10 MiB cache   22 MiB queue  RPC:  0 conn,  0 req/s,   0 µs
2018-04-25 16:02:49  Syncing #3525841 0xe718…d472   284 hdr/s  29277+    0 Qed  #3525841    6/50 peers     10 MiB cache   22 MiB queue  RPC:  0 conn,  0 req/s,   0 µs
2018-04-25 16:02:54  Error removing stale DAG cache: Os { code: 5, kind: PermissionDenied, message: "Access is denied." }
2018-04-25 16:02:59  Syncing #3525841 0xe718…d472     0 hdr/s  29295+    0 Qed  #3525841    4/50 peers     10 MiB cache   22 MiB queue  RPC:  0 conn,  0 req/s,   0 µs
2018-04-25 16:03:04  Syncing #3525841 0xe718…d472     0 hdr/s  29586+    0 Qed  #3525841    6/50 peers     10 MiB cache   22 MiB queue  RPC:  0 conn,  0 req/s,   0 µs
2018-04-25 16:03:09  Syncing #3525841 0xe718…d472     0 hdr/s  26999+    0 Qed  #3525841    4/50 peers     10 MiB cache   20 MiB queue  RPC:  0 conn,  0 req/s,   0 µs
2018-04-25 16:03:14  Syncing #3525841 0xe718…d472     0 hdr/s  21115+    0 Qed  #3525841    3/50 peers     10 MiB cache   16 MiB queue  RPC:  0 conn,  0 req/s,   0 µs
2018-04-25 16:03:15  Error removing stale DAG cache: Os { code: 5, kind: PermissionDenied, message: "Access is denied." }
2018-04-25 16:03:19  Syncing #3525841 0xe718…d472     0 hdr/s  21115+    0 Qed  #3525841    2/50 peers     10 MiB cache   16 MiB queue  RPC:  0 conn,  0 req/s,   0 µs
2018-04-25 16:03:56  Syncing #3525841 0xe718…d472     0 hdr/s  21115+    0 Qed  #3525841    3/50 peers     10 MiB cache   16 MiB queue  RPC:  0 conn,  0 req/s,   0 µs
2018-04-25 16:04:04  Syncing #3525841 0xe718…d472     0 hdr/s   7194+    0 Qed  #3525841    3/50 peers     10 MiB cache    5 MiB queue  RPC:  0 conn,  0 req/s,   0 µs
2018-04-25 16:04:09  Syncing #3525841 0xe718…d472     0 hdr/s      0+    0 Qed  #3525841    1/50 peers     10 MiB cache  0 bytes queue  RPC:  0 conn,  0 req/s,   0 µs
2018-04-25 16:04:14  Syncing #3525841 0xe718…d472     0 hdr/s      0+    0 Qed  #3525841    4/50 peers     10 MiB cache  0 bytes queue  RPC:  0 conn,  0 req/s,   0 µs
2018-04-25 16:04:19  Syncing #3525841 0xe718…d472     0 hdr/s      0+    0 Qed  #3525841    3/50 peers     10 MiB cache  0 bytes queue  RPC:  0 conn,  0 req/s,   0 µs
2018-04-25 16:04:24  Syncing #3525841 0xe718…d472     0 hdr/s      0+    0 Qed  #3525841    4/50 peers     10 MiB cache  0 bytes queue  RPC:  0 conn,  0 req/s,   0 µs
2018-04-25 16:04:29  Syncing #3525841 0xe718…d472     0 hdr/s      0+    0 Qed  #3525841    3/50 peers     10 MiB cache  0 bytes queue  RPC:  0 conn,  0 req/s,   0 µs
2018-04-25 16:04:34  Syncing #3525841 0xe718…d472     0 hdr/s      0+    0 Qed  #3525841    5/50 peers     10 MiB cache  0 bytes queue  RPC:  0 conn,  0 req/s,   0 µs
2018-04-25 16:04:39  Syncing #3525841 0xe718…d472     0 hdr/s      0+    0 Qed  #3525841    3/50 peers     10 MiB cache  0 bytes queue  RPC:  0 conn,  0 req/s,   0 µs
2018-04-25 16:04:44  Syncing #3525841 0xe718…d472     0 hdr/s      0+    0 Qed  #3525841    3/50 peers     10 MiB cache  0 bytes queue  RPC:  0 conn,  0 req/s,   0 µs
2018-04-25 16:04:49  Syncing #3525841 0xe718…d472     0 hdr/s      0+    0 Qed  #3525841    4/50 peers     10 MiB cache  0 bytes queue  RPC:  0 conn,  0 req/s,   0 µs
2018-04-25 16:05:52  Syncing #3525841 0xe718…d472     0 hdr/s      0+    0 Qed  #3525841    5/50 peers     10 MiB cache  0 bytes queue  RPC:  0 conn,  0 req/s,   0 µs
2018-04-25 16:04:59  Syncing #3525841 0xe718…d472     0 hdr/s      0+    0 Qed  #3525841    4/50 peers     10 MiB cache  0 bytes queue  RPC:  0 conn,  0 req/s,   0 µs
2018-04-25 16:04:54  Syncing #3525841 0xe718…d472     0 hdr/s      0+    0 Qed  #3525841    4/50 peers     10 MiB cache  0 bytes queue  RPC:  0 conn,  0 req/s,   0 µs
2018-04-25 16:05:59  Syncing #3525841 0xe718…d472     0 hdr/s      0+    0 Qed  #3525841    6/50 peers     10 MiB cache  0 bytes queue  RPC:  0 conn,  0 req/s,   0 µs
2018-04-25 16:06:04  Syncing #3525841 0xe718…d472     0 hdr/s      0+    0 Qed  #3525841    7/50 peers     10 MiB cache  0 bytes queue  RPC:  0 conn,  0 req/s,   0 µs
2018-04-25 16:06:09  Syncing #3525841 0xe718…d472     0 hdr/s      0+    0 Qed  #3525841    6/50 peers     10 MiB cache  0 bytes queue  RPC:  0 conn,  0 req/s,   0 µs


C:\Program Files\Parity Technologies\Parity>parity --light
2018-04-25 16:06:48  Starting Parity/v1.11.0-nightly-baeda9347-20180424/x86_64-windows-msvc/rustc1.25.0
2018-04-25 16:06:48  Running in experimental Light Client mode.
2018-04-25 16:06:48  Multi-threaded server is not available on Windows. Falling back to single thread.
2018-04-25 16:06:48  Multi-threaded server is not available on Windows. Falling back to single thread.
2018-04-25 16:06:53  Public node URL: enode://85be716e31c9626286c4dd7bbc89d48238608414543c8a4d09d63351bcddf42b25b36c1091391d3f1c36ceb9af297763a6e9c4840eb772f44803fd53b8dc54aa@127.0.0.1:30303
2018-04-25 16:06:58  Syncing #3525841 0xe718…d472     0 hdr/s      0+    0 Qed  #3525841    6/50 peers   553 bytes cache  0 bytes queue  RPC:  0 conn,  0 req/s,   0 µs
2018-04-25 16:07:03  Syncing #3525841 0xe718…d472     0 hdr/s      0+    0 Qed  #3525841    4/50 peers   553 bytes cache  0 bytes queue  RPC:  0 conn,  0 req/s,   0 µs
2018-04-25 16:07:08  Syncing #3525841 0xe718…d472     0 hdr/s      0+    0 Qed  #3525841    6/50 peers   553 bytes cache  0 bytes queue  RPC:  0 conn,  0 req/s,   0 µs
2018-04-25 16:07:13  Syncing #3525841 0xe718…d472     0 hdr/s      0+    0 Qed  #3525841    6/50 peers   553 bytes cache  0 bytes queue  RPC:  0 conn,  0 req/s,   0 µs
2018-04-25 16:07:18  Syncing #3525841 0xe718…d472     0 hdr/s      0+    0 Qed  #3525841    5/50 peers   553 bytes cache  0 bytes queue  RPC:  0 conn,  0 req/s,   0 µs
2018-04-25 16:07:23  Syncing #3525841 0xe718…d472     0 hdr/s      0+    0 Qed  #3525841    6/50 peers   553 bytes cache  0 bytes queue  RPC:  0 conn,  0 req/s,   0 µs
2018-04-25 16:07:28  Syncing #3525841 0xe718…d472     0 hdr/s      0+    0 Qed  #3525841    5/50 peers   553 bytes cache  0 bytes queue  RPC:  0 conn,  0 req/s,   0 µs
2018-04-25 16:07:33  Syncing #3525841 0xe718…d472     0 hdr/s      0+    0 Qed  #3525841    4/50 peers   553 bytes cache  0 bytes queue  RPC:  0 conn,  0 req/s,   0 µs
2018-04-25 16:07:38  Syncing #3525841 0xe718…d472     0 hdr/s      0+    0 Qed  #3525841    5/50 peers   553 bytes cache  0 bytes queue  RPC:  0 conn,  0 req/s,   0 µs
2018-04-25 16:07:43  Syncing #3525841 0xe718…d472     0 hdr/s      0+    0 Qed  #3525841    6/50 peers   553 bytes cache  0 bytes queue  RPC:  0 conn,  0 req/s,   0 µs
2018-04-25 16:07:48  Syncing #3525841 0xe718…d472     0 hdr/s      0+    0 Qed  #3525841    6/50 peers   553 bytes cache  0 bytes queue  RPC:  0 conn,  0 req/s,   0 µs
2018-04-25 16:07:53  Syncing #3525841 0xe718…d472     0 hdr/s      0+    0 Qed  #3525841    5/50 peers   553 bytes cache  0 bytes queue  RPC:  0 conn,  0 req/s,   0 µs
2018-04-25 16:07:58  Syncing #3525841 0xe718…d472     0 hdr/s      0+    0 Qed  #3525841    7/50 peers   553 bytes cache  0 bytes queue  RPC:  0 conn,  0 req/s,   0 µs

[Tbaut]

@ilhanu you need to parity --light db kill first, then relaunch.

[xenoexclusive]

I'm having the same issue, but also whenever this happens my I/O is going absolutely through the roof. Can anyone confirm the same?

Using iotop my I/O is at 100%, often 'more', constantly once I stop receiving headers.

[Tbaut]

This should be solved by now.

[tzapu]

i can confirm i have not had any syncing problems with at least 6 recent light nodes/sync
good job

[Dominator008]

Still observing this.

[niklasad1]

@Dominator008

The code base has changed a bit lately, can you open a new issue or alternatively provide some more details such as which version, how many peers you got connected and so on?

Would be good if you could run parity --light --l trace=pip,sync and provide it!

Thanks

[cemkod]

I am experiencing this issue with light client on classic chain
sync=debug reports:
Sync target reached. Going idle

2019-04-15 16:20:23 IO Worker #2 DEBUG sync Maintaining sync (AncestorSearch(Awaiting(ReqId(89), 7856016, Complete { start: Number(7856016), skip: 0, max: 64, reverse: true })))
2019-04-15 16:20:23 IO Worker #0 DEBUG sync Maintaining sync (AncestorSearch(Awaiting(ReqId(89), 7856016, Complete { start: Number(7856016), skip: 0, max: 64, reverse: true })))
2019-04-15 16:20:23 IO Worker #2 DEBUG sync Maintaining sync (AncestorSearch(Awaiting(ReqId(89), 7856016, Complete { start: Number(7856016), skip: 0, max: 64, reverse: true })))
2019-04-15 16:20:23 IO Worker #3 DEBUG sync Maintaining sync (AncestorSearch(Awaiting(ReqId(89), 7856016, Complete { start: Number(7856016), skip: 0, max: 64, reverse: true })))
2019-04-15 16:20:23 IO Worker #1 DEBUG sync Maintaining sync (AncestorSearch(Awaiting(ReqId(89), 7856016, Complete { start: Number(7856016), skip: 0, max: 64, reverse: true })))
2019-04-15 16:20:23 IO Worker #2 DEBUG sync Maintaining sync (AncestorSearch(Awaiting(ReqId(89), 7856016, Complete { start: Number(7856016), skip: 0, max: 64, reverse: true })))
2019-04-15 16:20:23 IO Worker #0 DEBUG sync Maintaining sync (AncestorSearch(Awaiting(ReqId(89), 7856016, Complete { start: Number(7856016), skip: 0, max: 64, reverse: true })))
2019-04-15 16:20:23 IO Worker #1 DEBUG sync Maintaining sync (AncestorSearch(Awaiting(ReqId(89), 7856016, Complete { start: Number(7856016), skip: 0, max: 64, reverse: true })))
2019-04-15 16:20:23 IO Worker #0 DEBUG sync Maintaining sync (AncestorSearch(Awaiting(ReqId(89), 7856016, Complete { start: Number(7856016), skip: 0, max: 64, reverse: true })))
2019-04-15 16:20:23 IO Worker #2 DEBUG sync Maintaining sync (AncestorSearch(Awaiting(ReqId(89), 7856016, Complete { start: Number(7856016), skip: 0, max: 64, reverse: true })))
2019-04-15 16:20:23 IO Worker #2 DEBUG sync Maintaining sync (AncestorSearch(Awaiting(ReqId(89), 7856016, Complete { start: Number(7856016), skip: 0, max: 64, reverse: true })))
2019-04-15 16:20:23 IO Worker #0 DEBUG sync Maintaining sync (AncestorSearch(Awaiting(ReqId(89), 7856016, Complete { start: Number(7856016), skip: 0, max: 64, reverse: true })))
2019-04-15 16:20:23 IO Worker #1 DEBUG sync Maintaining sync (AncestorSearch(Queued(7856016)))
2019-04-15 16:20:24 IO Worker #2 DEBUG sync Found common ancestor with best chain
2019-04-15 16:20:24 IO Worker #2 DEBUG sync Maintaining sync (AncestorSearch(FoundCommon(7856016, 0x1ca1a09a7217eae058c3e03e53bcbb071a6a79f8a4fec8603c6a37bf84a91a48)))
2019-04-15 16:20:24 IO Worker #3 INFO import Syncing #7856016 0x1ca1…1a48 0.0 hdr/s 0+ 0 Qed 45/100 peers 560 bytes cache 0 bytes queue RPC: 0 conn, 0 req/s, 0 µs
2019-04-15 16:20:27 IO Worker #3 DEBUG sync Maintaining sync (Rounds(Aborted: TargetReached, 0 remain))
2019-04-15 16:20:27 IO Worker #3 DEBUG sync Sync target reached. Going idle