Paper: Server crashes/console error when shutting down the server normally

[MCHalfAssed]

Link/paste of stack trace

https://hasteb.in/aqesanes.pl

Edit* Full log : https://hasteb.in/qomowiqu.md

Plugin list:

AdvancedNMotd, AsyncWorldEdit, BetterSleeping3, ChargedCreeper, Chunkmaster, CommandSigns, CoreProtect, CraftBook, DeathMessagesPrime, DMPMonitorCompat, DMPWorldGuard, DragonEggDrop, EntityTrackerFixer, Essentials, EssentialsProtect, EssentialsSpawn, GPAccruals, GriefPrevention, HolographicDisplays, HolographicExtension, HopperFilter, IllegalStack, ItemEdit, JoinMessagePlus, LaggRemover, LightAPI, NametagEdit, NBTAPI, OpenInv, PacketLimiter, PermissionsEx, PlaceholderAPI, PlayerHeads, ProtocolLib, pvparena, PvPManager, PvPToggle, RandomTeleport, SAML, SimplePets, spark, StatisticEditor, StopNetherTrap, SuperTrails*, TAB, TopSurvivor, UltimateKits, VarLight, Vault, VentureChat, WorldEdit, WorldGuard, WorldGuardExtraFlags

Actions to reproduce (if known):

Shutting down the server using the console GUI normally

Paper build number:

This server is running Paper version git-Paper-10 (MC: 1.16.1) (Implementing API version 1.16.1-R0.1-SNAPSHOT)

[BomBardyGamer]

I could not see the full stack trace in the bin link you sent, there should at least be an error that looks something like:
com.example.ExampleException: This is an example of the exception you should see

Followed by a "caused by" clause that looks a bit like:

caused by: com.example.ExampleException: This is an example of the caused by clause you should see

If you are able to pull up the full log (probably in logs/latest.log or logs/date.log.gz if older), please paste that to your chosen paste service (I personally recommend https://bin.bardy.me but the choice is ultimately yours).

[MCHalfAssed]

https://hasteb.in/mijafevo.pl

Here's what I have for now, going to get the full log in a sec

[MCHalfAssed]

Here's a full log;

https://hasteb.in/qomowiqu.md

[BomBardyGamer]

Looks like a Vanilla bug to me, since it doesn't call any Paper methods. Have you tried reproducing on the latest build? (git-Paper-12)

[KennyTV]

Looks like a Vanilla bug to me, since it doesn't call any Paper methods. Have you tried reproducing on the latest build? (git-Paper-12)

Paper patches the server; just because it doesn't call any paper api or specific impl, doesn't mean it might not be caused by methods changed by paper ( ﾉ ﾟｰﾟ)ﾉ

[MCHalfAssed]

Just updated to Paper-12, the error still persists.

[BomBardyGamer]

True @KennyTV , my bad. Let me attempt to reproduce this without any plugins.

[MCHalfAssed]

I removed all plugins and didn't get the error - Well, time to start troubleshooting. Any guesses as to which one might be causing the issue?

[BomBardyGamer]

Yeah I was unable to reproduce after multiple times without any plugins. Sorry, I'm not sure which plugin could be causing it, I suggest just removing all your plugins, and then adding them back one by one until you get an error.

[MCHalfAssed]

I narrowed this issue down to Varlight. Is this due to an issue with Paper/Varlight like this issue here? @flori-schwa

Running most recent version, 1.12

https://github.com/PaperMC/Paper/issues/3524

[aikar]

Something is causing the server to reload resources constantly which is really bad, likely due to an NMS plugin that's not been updated correctly to 1.16.

This is likely destroying your server performance.

But I have fixed this in latest builds to at least identify when its running on the wrong thread during shutdown and avoid calling the method, so update, but def want to remove any nms plugins that have not explicitly updated.

@flori-schwa if it is varlight, it seems the issue is that the server is triggering a reload of the resource manager constantly, as thats the code blowing up, and I'm suspicious why someone would be spamming /minecraft:reload

[MCHalfAssed]

The server performance is fine, actually. This is just a test server. It's only when I send the server a 'stop' command that I get this error. When I disable VarLight and run a stop command, the error is gone and the server shuts down normally.

[flori-schwa]

Sorry that I keep causing trouble for you guys. I just published VarLight 1.12.1 which should fix this: https://github.com/flori-schwa/VarLight/releases/tag/1.12.1