[1.16.1] Villager trade crash

[JKerboeuf]

Trading with some Villagers crashes the server, also watchdog can't stop the server, but this has already been reported in #4008 update: it seems like it is when trading glass panes with cartographers

https://pastebin.com/D6u22hmP

plugin list :

• BetonQuest 1.12.0-DEV-90
• Brewery 2.1.1
• BungeeTabListPlus_BukkitBridge-3.3.3.jar
• BuycraftX.jar
• Citizens 2.0.27-b2069
• CMI 8.7.3.4
• CMIEInjector 1.0.2.3
• CommandNPC 1.9.1
• CrazyAuctions 1.2.15
• CrazyCrates 1.10.1-SNAPSHOT
• DynamicShop 2.11.7
• EntityDetection 1.1.3 build 21
• EntityWatch 2.7
• griefdefender 1.4.7
• Guilds 3.5.5.3
• HeadDatabase 4.12.4
• item-nbt-api 2.4.1
• LimitPillagers 2.13.0
• LogBlock 1.16.1.1
• LuckPerms 5.1.73
• MaSuiteCore
• MaSuiteHomes
• MaSuiteTeleport
• MMOItems 5.5.3-SNAPSHOT
• MMOLib 1.2.4
• Multiverse-Core 4.0.0
• MysqlPlayerDataBridge 3.34.0
• NoCheatPlus 3.16.0-RC-sMD5NET-b1134
• orereplacer 1.0.1.13.16a
• PlaceholderAPI 2.10.7
• ProtocolLib 4.5.1-SNAPSHOT-b445
• QuickShop 4.0.3.3
• RedstoneClockDetector 1.2.1
• SAML 2.0.0
• SimpleEntityTracker 1.0
• Smeltery 1.0-SNAPSHOT
• spark 1.4.2
• StackMob 5.2.3
• TAB 2.8.1
• Vault 1.7.3
• VillagerOptimiser 1.1.3
• worldedit 7.2.0-beta-02
• worldguard 7.0.4-beta1

[radiant-ai]

I had the same issue and thus decided to test. When I trade the glass panes server freezes but does not crash, if I trade even more it gives the same watchdog errors with a very hard freeze for 10-20 seconds.

[JKerboeuf]

It probably depends on the load on the server, on a server with no plugins, it just freezes for some time, but we have 50+ plugins, and a lot loaded so the server doesn't survive the freeze

[MrIvanPlays]

Can reproduce

[electronicboy]

Duplicate of #2312