Some issues with the latest Linux build #848

escept · 2018-10-14T23:23:09Z

On my server randomly at spawn people start receiving entity not found errors, then get disconnected for syncing with the server for too long. This only started happening when I switched to Linux. I downloaded the game from the UG mirror.
Edit: this was on 0.8.2.0,I didn't notice the new release. I'll see tomorrow if 0.8.2.1 has the same issue.

escept · 2018-10-17T16:47:16Z

Reopening, the issue is still present on 0.8.2.1 for me.

I think this issue only occurs for me. I've been trying to fix this for several days, but got nowhere. I figured this is the only place I could get help from.

Regalis11 · 2018-10-17T17:38:02Z

Unfortunately I'm not sure what's causing this, but if you could provide some more info it might be easier to diagnose:

Are you using the dedicated server or hosting from the normal game?
Does it happen immediately after a round starts, or only when a client joins mid-round?
Are you using any mods?
If you were able to find out what the entity that's causing those errors is, it'd be extremely helpful. You can get a list of entities and their IDs using the console command "dumpids [count]", where the count parameter is the number of entities to list. In this case, you could enter "dumpids 1951" at the server's side and hopefully see the entity in question at the end of the list.

I'm sorry for the inconvenience! If you can find any more details about this (in particular what the entity is) it'd be a great help.

escept · 2018-10-17T17:56:10Z

Dedicated server. I'm running Ubuntu server (64 bit).
I never saw it happen after a respawn shuttle, only at round starts occasionally.
No mods.
Now, that I've tested it, (now said entity 1777 not found), dumpids showed that ID 1777 is actually the player.

Regalis11 · 2018-10-17T19:13:53Z

Managed to reproduce it now. It seems that it has something to do with level generation, in some cases the ruins generate differently at the client's side, causing a different number of structures and items to be created which leads to a ton of entity ID mismatches. Not sure what's causing it yet - at first I suspected it was due to the recently added level mirroring, but it seems to happen in non-mirrored levels as well. I'll do some more debugging and try to fix this asap.

Regalis11 · 2018-10-17T20:40:52Z

Floating point errors, my arch nemesis.

Looks like a few of the floating point calculations done during the level generation may produce different results on different machines (and apparently even on the same machine), which causes the layouts of the levels to differ, leading to the number of items/structures in the level being different and IDs getting completely messed up.

I'm not quite sure why this seems to only happen (or at least be more common) on Linux, nor why this problem hasn't surfaced before, but in any case I need to rethink the level generation logic a bit to fix it.

escept · 2018-10-17T20:52:59Z

I'm glad to hear that you figured it out! I'm confused how this error never surfaced for people I asked hosting on Linux, though.

…er to diagnose bugs like #848 in the future.

… floating point indeterminism from causing the level to differ between players. Also changed the way tunnels are carved, now it doesn't require the LinesIntersect method which seemed to be the cause for #848. This is not a 100% bulletproof way to get rid of the issue because doubles are not deterministic either, but I think it might be enough to make mismatches so unlikely that it never happens in practice. Need to do some automated testing to figure out if we need a more robust solution (switch to fixed point, make the server send some data that the client can use to ensure the level is generated correctly?)

zackwhit · 2018-11-06T19:48:10Z

I've also had similar if not the exact same issue when using the wrong version of Mono to run the server. Figure out how to install 5.4 and it seems to work great.

escept · 2018-11-13T00:18:46Z

Downgrading to mono 5.4.0 seems to be working as a temporary fix, thank you!

Panzergrenadier · 2018-12-06T16:23:23Z

How can i install mono 5.4 on Ubuntu 14.04?

hubismal · 2019-02-19T18:34:49Z

How can i install mono 5.4 on Ubuntu 14.04?

This was such a frequently asked issue I made a guide for it. You can find out how to install Mono 5.4 here

Note that this isn't/won't be necessary for the full release.

commit 633e54b Author: Joonas Rikkonen <poe.regalis@gmail.com> Date: Tue Mar 19 18:02:21 2019 +0200 Include level equality check value in round start messages, so clients immediately know if the level generated at their end doesn't match the one generated by the server (which will cause ID mismatches and more hard-to-diagnose desync kicks during the rounds). Related to #848 commit 68e4107 Author: Joonas Rikkonen <poe.regalis@gmail.com> Date: Tue Mar 19 18:01:01 2019 +0200 Readded client error handling from ef9afed. Not sure how it got removed, probably a messed up merge somewhere down the line when working on the client-server-separation branch or when merging the Steam version work from dev to master. In any case this should help diagnose desync kicks such as #1293.

SaulApostle · 2019-06-29T15:26:32Z

9.0.7 win10 I'm the host.

Regalis11 · 2020-04-27T13:38:19Z

Created a new ticket with more info: #2723

DarkDestiny21 · 2022-12-26T12:40:47Z

I had this happened to me when I want to join my friend modded lobbies I have to enable or disable some mods to fix it or just rejoin the lobbies.

gosver · 2023-12-25T21:02:48Z

Looks like a few of the floating point calculations done during the level generation may produce different results on different machines (and apparently even on the same machine), which causes the layouts of the levels to differ, leading to the number of items/structures in the level being different and IDs getting completely messed up.

I'm not quite sure why this seems to only happen (or at least be more common) on Linux, nor why this problem hasn't surfaced before, but in any case I need to rethink the level generation logic a bit to fix it.

I get this problem on Winodws 10, server Player-Hosted with mods

escept closed this as completed Oct 14, 2018

escept reopened this Oct 17, 2018

Regalis11 added Bug Something isn't working Linux only Networking Issue related to multiplayer or networking labels Oct 17, 2018

Regalis11 added a commit that referenced this issue Oct 17, 2018

Added a level equality check to client error handling to make it easi…

ef9afed

…er to diagnose bugs like #848 in the future.

Regalis11 mentioned this issue Nov 8, 2018

Solve ordering issues when serializing lists #900

Closed

Regalis11 mentioned this issue Dec 6, 2018

Linux server critical bug: kicking players for missing entities #964

Closed

Regalis11 mentioned this issue Mar 19, 2019

Campaign desync in steam on round start, entity not found (Save file desync or level/mission gen problem?) #1293

Closed

1 task

Regalis11 mentioned this issue Mar 24, 2019

Multiplayer connectivity issues on 0.8.9.7 onwards have worsened in stability but difficult to pinpoint source or cause or even provide proper logs. #1340

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Regalis11 added the Code Programming task label Mar 27, 2019

Regalis11 mentioned this issue May 6, 2019

[0.8.10.0] A few server errors. #1452

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Regalis11 mentioned this issue Apr 27, 2020

"Level equality check failed" error when starting a round #2723

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Regalis11 closed this as completed Apr 27, 2020

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Some issues with the latest Linux build #848

Some issues with the latest Linux build #848

escept commented Oct 14, 2018 •

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escept commented Oct 17, 2018 •

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Regalis11 commented Oct 17, 2018

escept commented Oct 17, 2018

Regalis11 commented Oct 17, 2018

Regalis11 commented Oct 17, 2018

escept commented Oct 17, 2018

zackwhit commented Nov 6, 2018

escept commented Nov 13, 2018 •

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Panzergrenadier commented Dec 6, 2018

hubismal commented Feb 19, 2019

SaulApostle commented Jun 29, 2019 •

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Regalis11 commented Apr 27, 2020

DarkDestiny21 commented Dec 26, 2022

gosver commented Dec 25, 2023

Some issues with the latest Linux build #848

Some issues with the latest Linux build #848

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escept commented Oct 14, 2018 • edited Loading

escept commented Oct 17, 2018 • edited Loading

Regalis11 commented Oct 17, 2018

escept commented Oct 17, 2018

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Regalis11 commented Oct 17, 2018

escept commented Oct 17, 2018

zackwhit commented Nov 6, 2018

escept commented Nov 13, 2018 • edited Loading

Panzergrenadier commented Dec 6, 2018

hubismal commented Feb 19, 2019

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Regalis11 commented Apr 27, 2020

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gosver commented Dec 25, 2023

escept commented Oct 14, 2018 •

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escept commented Oct 17, 2018 •

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escept commented Nov 13, 2018 •

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SaulApostle commented Jun 29, 2019 •

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