Pocketmine-mp: Some players cannot connect to the server. (Again)

[zKoz210]

Issue description

The problem still exist. I think, that could be like a continuation of issue https://github.com/pmmp/PocketMine-MP/issues/1505.
Now the problem appears so the player is connected in a console, but the game client displays “locating server” and afterwards “disconnected from server”

Steps to reproduce the issue

I'm sorry, but I don't know. This is manifested from half of my players.

OS and versions

• PocketMine-MP: https://github.com/pmmp/PocketMine-MP/commit/d728154e87b0383bba5814a72c1c3a0f60f2e3f5
• RakLib: https://github.com/pmmp/RakLib/commit/998af685be51d6ee8a1e206066ccd96c21450bfd
• PHP: 7.2.1
• Server OS: CentOS 7.4.1708
• Game version: PE/Win10

Plugins

• Server are tested without plugins.

Crashdump, backtrace or other files

[03:43:22] [RakLibServer thread/DEBUG]: Created session for 192.162.35.203 47772 with MTU size 1492
[03:43:22] [Server thread/DEBUG]: RFulkren is logged into Xbox Live
[03:43:34] [Server thread/INFO]: RFulkren[/192.162.35.203:47772] вошел с id сущности 23 на (survival, -2728.3154, 69.5387, 1688.4355)
[03:44:12] [RakLibServer thread/DEBUG]: Closed session for 192.162.35.203 47772
[03:44:12] [RakLibServer thread/DEBUG]: Ignored connected packet from 192.162.35.203 47772 due to no session opened (0xc0)
[03:44:12] [RakLibServer thread/DEBUG]: Ignored connected packet from 192.162.35.203 47772 due to no session opened (0xa0)
[03:44:12] [Server thread/INFO]: RFulkren[/192.162.35.203:47772] отключился: client disconnect

[Muqsit]

Just wait a couple of seconds until RakLib kicks the client?

[loneliplay]

I am too have this problem. Logs clear. I am playing from W10 Edition
7:04:43] [Server thread/INFO]: Loading pocketmine.yml...

[dktapps]

@zKoz210 can you reproduce this?

Please try reverting https://github.com/pmmp/RakLib/commit/2f1c79abfaed27cc34e2d82b1e8888d7d9fc22d9 and see if the bug still occurs. Thanks.

[zKoz210]

@dktapps Yes, now player can join to the server.

I would like you to tell me whether there are any negative aspects, if you set the mtu size is 1432?

[dktapps]

@zKoz210 yes, it's a significant waste of bytes on better connections.

However, I pushed a commit (https://github.com/pmmp/PocketMine-MP/commit/0c868b16b6a1e2b1fd9883b4b06c9cb25b6e5678) to allow you to override the maximum MTU size manually, so have a play with that.

[zKoz210]

But how is it https://github.com/pmmp/RakLib/blob/master/server/OfflineMessageHandler.php#L50?

I once tried to set 1432 not changing this line, and players could not come, or i'm mistaken?

[dktapps]

That line is correct. It matches RakNet. The MTU size is supposed to include the sizes of the IP and UDP headers.

If you're using an old shit router, try dropping the MTU size to 1404.

[zKoz210]

@dktapps thank you so much for option in configuration. I will try soon to check it out. Yet do not close issue please.

[dktapps]

Previously 1432 would have worked, because internally RakLib was capping it to 1432 - 28 bytes (this was a long and many-stage refactor) so the actual MTU size would have been 1404. So try 1404 with latest commits and see if it works.

[mal0ne-23]

I have this problem aswell. Only some players cannot connect.

[NikeboyHU]

I have this problem. No idea fix this :/

[dktapps]

You're all telling me you have the problem, but I still have no idea how to reproduce it, so it can't be fixed until then.

[dktapps]

@NikeboyHU please surround that in grave quotes ``` ```.

Additionally, the second error looks like it's come from a spoon.

[dktapps]

Removed spoon spam.

[NikeboyHU]

It will I trying anyone more server software, and second error it same in here error with PocketMine software. Sorry, but max. some lines code changed. Sorry,but i testing, and copying in software problem error messages.

[dktapps]

Any update on this?

[zKoz210]

I use the mtu is 1464 and it works perfectly.

[nasiridrishi]

I have been getting this issue when player trying to join servers from lobby(transfer) they get disconnected while they wont when they try direct IP! No idea its server issue? but there is not any red logs for that!

[zKoz210]

@optimusprime338 Try to make the mtu to 1464 and check again.

[nasiridrishi]

This was a spam comment, who cares whatever it was? Blocked the author anyway. Original content for nerds with OCD:

dGhpcyBpc3N1ZSBqdXN0IGFmdGVyIGluc3RhbGxpbmcgdGVhc3Bvb24odGhvdWdodCBpdCB3aWxs
IGdvb2QgdG8gdXNlIGl0IG5vdykgYnV0IGV2ZW4gYWZ0ZXIgcmVtb3ZpbmcgdGhlIHBsdWdpbiBJ
IGFtIGdldHRpbmcgdGhpcyBpc3N1ZSAtLi0gDQohW2ltYWdlXShodHRwczovL3VzZXItaW1hZ2Vz
LmdpdGh1YnVzZXJjb250ZW50LmNvbS8yNzQ3OTIwOC8zNjIzNTQ1MC1jMTY0ODI2OC0xMjE2LTEx
ZTgtOTg5Ny01ZDVlYjUzNzJmMjIucG5nKQ0K

Disclaimer: This was not detected by a bot. This was detected by a magic from a no life no-life iron(II) thiooxide who watch the issue tracker all day very disrespectfully.

[mal0ne-23]

more information, sometimes this occurs when connecting via VPN. Might occur more or less often depending on how close the VPN service location is to the server host

[dktapps]

I believe the VPN issue is related to differences in path MTU not being determined correctly due to VPN compressing packets. I haven't managed to reproduce that bug yet though, so it's difficult to say.

[kenygamer]

@mal0ne-23 And viceversa. I use VPN and it works fine.

[dktapps]

@kenygamer your connection and VPN is not the same as everyone else's. Don't be so narrow minded.

[kenygamer]

@dktapps Yes, I know. Notice the and.

[dktapps]

your comment adds nothing to the discussion since you edited it.

also:

you really need to upvote yourself?

[kenygamer]

@dktapps Yeah, I upvoted for a friend. It helped her fix the join issue using a VPN.
PS: I added the and before you replied.