Parity-ethereum: "You are not connected to any peers. There is most likely some network issue. Fix connectivity."

[okayplanet]

I started off running Parity fine, then eventually was only connected to a single peer. This dropped off to 0 peers and now the display shows "You are not connected to any peers. There is most likely some network issue. Fix connectivity."

I'm running:

• Which Parity version?: Parity/v1.10.0-unstable-e7f3666-20180113/x86_64-linux-gnu/rustc1.23.0
• Which operating system?: Ubuntu 16.04.1 LTS
• How installed?: from source
• Are you fully synchronized?: no
• Which network are you connected to?: Kovan
• Did you try to restart the node?: yes

My issues seems to be identical to https://github.com/paritytech/parity/issues/6945 which was marked as "Fixed", though there doesn't seem to be a solution shared.

Here is a log of a run attempt with ./target/release/parity --testnet --config testnet_config.toml
parity-testnet.log

Not sure how typical it is to encounter peers with a different genesis block, but it is happening a lot:

genesis hash mismatch (ours: a3c5…2cb9, theirs: b2a5…6659)

[5chdn]

Please remove your nodes.json and try again!

[awgneo]

I have this issue as well and it requires me having to delete my nodes.json file multiple times per day or else my parity instance becomes unusable. I am on v1.8.6 on Kovan. My instance hovers around 6-9 peers and gradually drops to zero over the course of a few hours. I have a mainnet instance (also v1.8.6) on a cloned setup and it never experiences this issue. I have tried deleting the database and restarting. After the Kovan node syncs, the issue returns.

[okayplanet]

@awgneo, this describes exactly my issue. Though deleting the nodes.json file solves the immediate problem, that this emerges so predictively is an issue--the suggested hack/fix is not a sustainable solution. @5chdn, I suggest this issue be reconsidered if problem is not currently known and documented.

[awgneo]

I am able to get fully synchronized via warp, however; for me, this problem only manifests itself after warp sync is complete.

[5chdn]

This is probably the issue #7531

[neelimabhukya]

You are not connected to any peers. There is most likely some network issue. Fix connectivity.