Paper: Server crashing in build 342 - Needed to reverse back to 341 to fix.

[MCHalfAssed]

Link/paste of stack trace

08.06 21:27:09 [Server] INFO [+] [Mod] ~ YAHBOOBAY! decided to join us.
08.06 21:27:09 [Server] WARN [HolographicExtension] Loaded class me.clip.placeholderapi.PlaceholderAPI from PlaceholderAPI v2.10.6 which is not a depend, softdepend or loadbefore of this plugin.
08.06 21:27:09 [Connect] User HyperSilence, IP
08.06 21:27:09 [PebbleHost] HyperSilence ran command Message of the Day
08.06 21:27:09 [Server] WARN [Cloaked] Loaded class de.tr7zw.nbtapi.NBTItem from NBTAPI v2.2.0 which is not a depend, softdepend or loadbefore of this plugin.
08.06 21:27:10 [Server] WARN [PlaceholderAPI] Loaded class com.Ben12345rocks.VotingPlugin.Util.PlaceHolders.PlaceHolders from VotingPlugin v5.21.1 which is not a depend, softdepend or loadbefore of this plugin.
08.06 21:27:13 [Server] INFO [Global] [Mod] ~ YAHBOOBAY!: test
08.06 21:27:27 [Server] ERROR Caught exception in thread Thread[Server-Worker-4,4,main]
08.06 21:27:27 [Server] INFO java.lang.ClassCastException: com.sun.proxy.$Proxy58 cannot be cast to net.minecraft.server.v1_15_R1.IChunkAccess
08.06 21:27:27 [Server] INFO at net.minecraft.server.v1_15_R1.LightEngineLayer.a(LightEngineLayer.java:45) ~[patched_1.15.2.jar:git-Paper-342]
08.06 21:27:27 [Server] INFO at net.minecraft.server.v1_15_R1.LightEngineLayer.getBlockOptimized(LightEngineLayer.java:97) ~[patched_1.15.2.jar:git-Paper-342]
08.06 21:27:27 [Server] INFO at net.minecraft.server.v1_15_R1.LightEngineBlock.b(LightEngineBlock.java:52) ~[patched_1.15.2.jar:git-Paper-342]
08.06 21:27:27 [Server] INFO at net.minecraft.server.v1_15_R1.LightEngineBlock.a(LightEngineBlock.java:135) ~[patched_1.15.2.jar:git-Paper-342]
08.06 21:27:27 [Server] INFO at net.minecraft.server.v1_15_R1.LightEngineGraph.a(SourceFile:159) ~[patched_1.15.2.jar:git-Paper-342]
08.06 21:27:27 [Server] INFO at net.minecraft.server.v1_15_R1.LightEngineGraph.a(SourceFile:137) ~[patched_1.15.2.jar:git-Paper-342]
08.06 21:27:27 [Server] INFO at net.minecraft.server.v1_15_R1.LightEngineGraph.f(SourceFile:133) ~[patched_1.15.2.jar:git-Paper-342]
08.06 21:27:27 [Server] INFO at net.minecraft.server.v1_15_R1.LightEngineLayer.f(LightEngineLayer.java:30) ~[patched_1.15.2.jar:git-Paper-342]
08.06 21:27:27 [Server] INFO at net.minecraft.server.v1_15_R1.LightEngineLayer.a(LightEngineLayer.java:217) ~[patched_1.15.2.jar:git-Paper-342]
08.06 21:27:27 [Server] INFO at net.minecraft.server.v1_15_R1.LightEngine.a(SourceFile:30) ~[patched_1.15.2.jar:git-Paper-342]
08.06 21:27:27 [Server] INFO at net.minecraft.server.v1_15_R1.LightEngineThreaded.lambda$a$0(LightEngineThreaded.java:110) ~[patched_1.15.2.jar:git-Paper-342]
08.06 21:27:27 [Server] INFO at net.minecraft.server.v1_15_R1.LightEngineThreaded.lambda$runQueue$24(LightEngineThreaded.java:271) ~[patched_1.15.2.jar:git-Paper-342]
08.06 21:27:27 [Server] INFO at java.util.ArrayList.forEach(ArrayList.java:1257) ~[?:1.8.0_242]
08.06 21:27:27 [Server] INFO at net.minecraft.server.v1_15_R1.LightEngineThreaded.runQueue(LightEngineThreaded.java:271) ~[patched_1.15.2.jar:git-Paper-342]
08.06 21:27:27 [Server] INFO at net.minecraft.server.v1_15_R1.LightEngineThreaded.lambda$queueUpdate$22(LightEngineThreaded.java:242) ~[patched_1.15.2.jar:git-Paper-342]
08.06 21:27:27 [Server] INFO at net.minecraft.server.v1_15_R1.ThreadedMailbox.e(ThreadedMailbox.java:78) ~[patched_1.15.2.jar:git-Paper-342]
08.06 21:27:27 [Server] INFO at net.minecraft.server.v1_15_R1.ThreadedMailbox.a(ThreadedMailbox.java:120) ~[patched_1.15.2.jar:git-Paper-342]
08.06 21:27:27 [Server] INFO at net.minecraft.server.v1_15_R1.ThreadedMailbox.run(ThreadedMailbox.java:86) ~[patched_1.15.2.jar:git-Paper-342]
08.06 21:27:27 [Server] INFO at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149) [?:1.8.0_242]
08.06 21:27:27 [Server] INFO at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624) [?:1.8.0_242]
08.06 21:27:27 [Server] INFO at java.lang.Thread.run(Thread.java:748) [?:1.8.0_242]
08.06 21:27:38 [Server] ERROR --- DO NOT REPORT THIS TO PAPER - THIS IS NOT A BUG OR A CRASH  - git-Paper-342 (MC: 1.15.2) ---
08.06 21:27:38 [Server] ERROR The server has not responded for 10 seconds! Creating thread dump
08.06 21:27:38 [Server] ERROR ------------------------------
08.06 21:27:38 [Server] ERROR Server thread dump (Look for plugins here before reporting to Paper!):
08.06 21:27:38 [Server] ERROR Chunk wait task info below: 
08.06 21:27:38 [Server] ERROR -59,64 in 'world:
08.06 21:27:38 [Server] ERROR Load Task - none
08.06 21:27:38 [Server] ERROR Save Task - none
08.06 21:27:38 [Server] ERROR Chunk Holder - non-null
08.06 21:27:38 [Server] ERROR Chunk Status - minecraft:full
08.06 21:27:38 [Server] ERROR Chunk Ticket Status - minecraft:full
08.06 21:27:38 [Server] ERROR Chunk Holder Status - minecraft:features
08.06 21:27:38 [Server] ERROR Chunk Holder Priority - 2
08.06 21:27:38 [Server] ERROR ------------------------------
08.06 21:27:38 [Server] ERROR Current Thread: Server thread
08.06 21:27:38 [Server] ERROR PID: 25 | Suspended: false | Native: false | State: TIMED_WAITING
08.06 21:27:38 [Server] ERROR Stack:
08.06 21:27:38 [Server] ERROR sun.misc.Unsafe.park(Native Method)
08.06 21:27:38 [Server] ERROR java.util.concurrent.locks.LockSupport.parkNanos(LockSupport.java:215)
08.06 21:27:38 [Server] ERROR net.minecraft.server.v1_15_R1.IAsyncTaskHandler.bl(IAsyncTaskHandler.java:131)
08.06 21:27:38 [Server] ERROR net.minecraft.server.v1_15_R1.IAsyncTaskHandler.awaitTasks(IAsyncTaskHandler.java:120)
08.06 21:27:38 [Server] ERROR net.minecraft.server.v1_15_R1.ChunkProviderServer.getChunkAt(ChunkProviderServer.java:492)
08.06 21:27:38 [Server] ERROR net.minecraft.server.v1_15_R1.IChunkProvider.getChunkAt(SourceFile:16)
08.06 21:27:38 [Server] ERROR org.bukkit.craftbukkit.v1_15_R1.CraftWorld.getChunkAt(CraftWorld.java:402)
08.06 21:27:38 [Server] ERROR org.bukkit.craftbukkit.v1_15_R1.CraftWorld.getChunkAt(CraftWorld.java:1015)
08.06 21:27:38 [Server] ERROR org.bukkit.Location.getChunk(Location.java:123)
08.06 21:27:38 [Server] ERROR com.songoda.ultimatekits.handlers.DisplayItemHandler.displayItem(DisplayItemHandler.java:51)
08.06 21:27:38 [Server] ERROR com.songoda.ultimatekits.handlers.DisplayItemHandler.displayItems(DisplayItemHandler.java:37)
08.06 21:27:38 [Server] ERROR com.songoda.ultimatekits.handlers.DisplayItemHandler$$Lambda$3867/1306713599.run(Unknown Source)
08.06 21:27:38 [Server] ERROR org.bukkit.craftbukkit.v1_15_R1.scheduler.CraftTask.run(CraftTask.java:84)
08.06 21:27:38 [Server] ERROR org.bukkit.craftbukkit.v1_15_R1.scheduler.CraftScheduler.mainThreadHeartbeat(CraftScheduler.java:461)
08.06 21:27:38 [Server] ERROR net.minecraft.server.v1_15_R1.MinecraftServer.b(MinecraftServer.java:1263)
08.06 21:27:38 [Server] ERROR net.minecraft.server.v1_15_R1.DedicatedServer.b(DedicatedServer.java:430)
08.06 21:27:38 [Server] ERROR net.minecraft.server.v1_15_R1.MinecraftServer.a(MinecraftServer.java:1180)
08.06 21:27:38 [Server] ERROR net.minecraft.server.v1_15_R1.MinecraftServer.run(MinecraftServer.java:969)
08.06 21:27:38 [Server] ERROR java.lang.Thread.run(Thread.java:748)
08.06 21:27:38 [Server] ERROR ------------------------------
08.06 21:27:38 [Server] ERROR --- DO NOT REPORT THIS TO PAPER - THIS IS NOT A BUG OR A CRASH ---
08.06 21:27:38 [Server] ERROR ------------------------------
08.06 21:27:43 [Server] ERROR --- DO NOT REPORT THIS TO PAPER - THIS IS NOT A BUG OR A CRASH  - git-Paper-342 (MC: 1.15.2) ---
08.06 21:27:43 [Server] ERROR The server has not responded for 15 seconds! Creating thread dump
08.06 21:27:43 [Server] ERROR ------------------------------
08.06 21:27:43 [Server] ERROR Server thread dump (Look for plugins here before reporting to Paper!):
08.06 21:27:43 [Server] ERROR Chunk wait task info below: 
08.06 21:27:43 [Server] ERROR -59,64 in 'world:
08.06 21:27:43 [Server] ERROR Load Task - none
08.06 21:27:43 [Server] ERROR Save Task - none
08.06 21:27:43 [Server] ERROR Chunk Holder - non-null
08.06 21:27:43 [Server] ERROR Chunk Status - minecraft:full
08.06 21:27:43 [Server] ERROR Chunk Ticket Status - minecraft:full
08.06 21:27:43 [Server] ERROR Chunk Holder Status - minecraft:features
08.06 21:27:43 [Server] ERROR Chunk Holder Priority - 2
08.06 21:27:43 [Server] ERROR ------------------------------
08.06 21:27:43 [Server] ERROR Current Thread: Server thread
08.06 21:27:43 [Server] ERROR PID: 25 | Suspended: false | Native: false | State: TIMED_WAITING
08.06 21:27:43 [Server] ERROR Stack:
08.06 21:27:43 [Server] ERROR sun.misc.Unsafe.park(Native Method)
08.06 21:27:43 [Server] ERROR java.util.concurrent.locks.LockSupport.parkNanos(LockSupport.java:215)
08.06 21:27:43 [Server] ERROR net.minecraft.server.v1_15_R1.IAsyncTaskHandler.bl(IAsyncTaskHandler.java:131)
08.06 21:27:43 [Server] ERROR net.minecraft.server.v1_15_R1.IAsyncTaskHandler.awaitTasks(IAsyncTaskHandler.java:120)
08.06 21:27:43 [Server] ERROR net.minecraft.server.v1_15_R1.ChunkProviderServer.getChunkAt(ChunkProviderServer.java:492)
08.06 21:27:43 [Server] ERROR net.minecraft.server.v1_15_R1.IChunkProvider.getChunkAt(SourceFile:16)
08.06 21:27:43 [Server] ERROR org.bukkit.craftbukkit.v1_15_R1.CraftWorld.getChunkAt(CraftWorld.java:402)
08.06 21:27:43 [Server] ERROR org.bukkit.craftbukkit.v1_15_R1.CraftWorld.getChunkAt(CraftWorld.java:1015)
08.06 21:27:43 [Server] ERROR org.bukkit.Location.getChunk(Location.java:123)
08.06 21:27:43 [Server] ERROR com.songoda.ultimatekits.handlers.DisplayItemHandler.displayItem(DisplayItemHandler.java:51)
08.06 21:27:43 [Server] ERROR com.songoda.ultimatekits.handlers.DisplayItemHandler.displayItems(DisplayItemHandler.java:37)
08.06 21:27:43 [Server] ERROR com.songoda.ultimatekits.handlers.DisplayItemHandler$$Lambda$3867/1306713599.run(Unknown Source)
08.06 21:27:43 [Server] ERROR org.bukkit.craftbukkit.v1_15_R1.scheduler.CraftTask.run(CraftTask.java:84)
08.06 21:27:43 [Server] ERROR org.bukkit.craftbukkit.v1_15_R1.scheduler.CraftScheduler.mainThreadHeartbeat(CraftScheduler.java:461)
08.06 21:27:43 [Server] ERROR net.minecraft.server.v1_15_R1.MinecraftServer.b(MinecraftServer.java:1263)
08.06 21:27:43 [Server] ERROR net.minecraft.server.v1_15_R1.DedicatedServer.b(DedicatedServer.java:430)
08.06 21:27:43 [Server] ERROR net.minecraft.server.v1_15_R1.MinecraftServer.a(MinecraftServer.java:1180)
08.06 21:27:43 [Server] ERROR net.minecraft.server.v1_15_R1.MinecraftServer.run(MinecraftServer.java:969)
08.06 21:27:43 [Server] ERROR java.lang.Thread.run(Thread.java:748)
08.06 21:27:43 [Server] ERROR ------------------------------
08.06 21:27:43 [Server] ERROR --- DO NOT REPORT THIS TO PAPER - THIS IS NOT A BUG OR A CRASH ---
08.06 21:27:43 [Server] ERROR ------------------------------
08.06 21:27:48 [Server] ERROR --- DO NOT REPORT THIS TO PAPER - THIS IS NOT A BUG OR A CRASH  - git-Paper-342 (MC: 1.15.2) ---
08.06 21:27:48 [Server] ERROR The server has not responded for 20 seconds! Creating thread dump
08.06 21:27:48 [Server] ERROR ------------------------------
08.06 21:27:48 [Server] ERROR Server thread dump (Look for plugins here before reporting to Paper!):
08.06 21:27:48 [Server] ERROR Chunk wait task info below: 
08.06 21:27:48 [Server] ERROR -59,64 in 'world:
08.06 21:27:48 [Server] ERROR Load Task - none
08.06 21:27:48 [Server] ERROR Save Task - none
08.06 21:27:48 [Server] ERROR Chunk Holder - non-null
08.06 21:27:48 [Server] ERROR Chunk Status - minecraft:full
08.06 21:27:48 [Server] ERROR Chunk Ticket Status - minecraft:full
08.06 21:27:48 [Server] ERROR Chunk Holder Status - minecraft:features
08.06 21:27:48 [Server] ERROR Chunk Holder Priority - 2
08.06 21:27:48 [Server] ERROR ------------------------------
08.06 21:27:48 [Server] ERROR Current Thread: Server thread
08.06 21:27:48 [Server] ERROR PID: 25 | Suspended: false | Native: false | State: TIMED_WAITING
08.06 21:27:48 [Server] ERROR Stack:
08.06 21:27:48 [Server] ERROR sun.misc.Unsafe.park(Native Method)
08.06 21:27:48 [Server] ERROR java.util.concurrent.locks.LockSupport.parkNanos(LockSupport.java:215)
08.06 21:27:48 [Server] ERROR net.minecraft.server.v1_15_R1.IAsyncTaskHandler.bl(IAsyncTaskHandler.java:131)
08.06 21:27:48 [Server] ERROR net.minecraft.server.v1_15_R1.IAsyncTaskHandler.awaitTasks(IAsyncTaskHandler.java:120)
08.06 21:27:48 [Server] ERROR net.minecraft.server.v1_15_R1.ChunkProviderServer.getChunkAt(ChunkProviderServer.java:492)
08.06 21:27:48 [Server] ERROR net.minecraft.server.v1_15_R1.IChunkProvider.getChunkAt(SourceFile:16)
08.06 21:27:48 [Server] ERROR org.bukkit.craftbukkit.v1_15_R1.CraftWorld.getChunkAt(CraftWorld.java:402)
08.06 21:27:48 [Server] ERROR org.bukkit.craftbukkit.v1_15_R1.CraftWorld.getChunkAt(CraftWorld.java:1015)
08.06 21:27:48 [Server] ERROR org.bukkit.Location.getChunk(Location.java:123)
08.06 21:27:48 [Server] ERROR com.songoda.ultimatekits.handlers.DisplayItemHandler.displayItem(DisplayItemHandler.java:51)
08.06 21:27:48 [Server] ERROR com.songoda.ultimatekits.handlers.DisplayItemHandler.displayItems(DisplayItemHandler.java:37)
08.06 21:27:48 [Server] ERROR com.songoda.ultimatekits.handlers.DisplayItemHandler$$Lambda$3867/1306713599.run(Unknown Source)
08.06 21:27:48 [Server] ERROR org.bukkit.craftbukkit.v1_15_R1.scheduler.CraftTask.run(CraftTask.java:84)
08.06 21:27:48 [Server] ERROR org.bukkit.craftbukkit.v1_15_R1.scheduler.CraftScheduler.mainThreadHeartbeat(CraftScheduler.java:461)
08.06 21:27:48 [Server] ERROR net.minecraft.server.v1_15_R1.MinecraftServer.b(MinecraftServer.java:1263)
08.06 21:27:48 [Server] ERROR net.minecraft.server.v1_15_R1.DedicatedServer.b(DedicatedServer.java:430)
08.06 21:27:48 [Server] ERROR net.minecraft.server.v1_15_R1.MinecraftServer.a(MinecraftServer.java:1180)
08.06 21:27:48 [Server] ERROR net.minecraft.server.v1_15_R1.MinecraftServer.run(MinecraftServer.java:969)
08.06 21:27:48 [Server] ERROR java.lang.Thread.run(Thread.java:748)
08.06 21:27:48 [Server] ERROR ------------------------------
08.06 21:27:48 [Server] ERROR --- DO NOT REPORT THIS TO PAPER - THIS IS NOT A BUG OR A CRASH ---
08.06 21:27:48 [Server] ERROR ------------------------------
08.06 21:27:53 [Server] ERROR --- DO NOT REPORT THIS TO PAPER - THIS IS NOT A BUG OR A CRASH  - git-Paper-342 (MC: 1.15.2) ---
08.06 21:27:53 [Server] ERROR The server has not responded for 25 seconds! Creating thread dump
08.06 21:27:53 [Server] ERROR ------------------------------
08.06 21:27:53 [Server] ERROR Server thread dump (Look for plugins here before reporting to Paper!):
08.06 21:27:53 [Server] ERROR Chunk wait task info below: 
08.06 21:27:53 [Server] ERROR -59,64 in 'world:
08.06 21:27:53 [Server] ERROR Load Task - none
08.06 21:27:53 [Server] ERROR Save Task - none
08.06 21:27:53 [Server] ERROR Chunk Holder - non-null
08.06 21:27:53 [Server] ERROR Chunk Status - minecraft:full
08.06 21:27:53 [Server] ERROR Chunk Ticket Status - minecraft:full
08.06 21:27:53 [Server] ERROR Chunk Holder Status - minecraft:features
08.06 21:27:53 [Server] ERROR Chunk Holder Priority - 2
08.06 21:27:53 [Server] ERROR ------------------------------
08.06 21:27:53 [Server] ERROR Current Thread: Server thread
08.06 21:27:53 [Server] ERROR PID: 25 | Suspended: false | Native: false | State: TIMED_WAITING
08.06 21:27:53 [Server] ERROR Stack:
08.06 21:27:53 [Server] ERROR sun.misc.Unsafe.park(Native Method)
08.06 21:27:53 [Server] ERROR java.util.concurrent.locks.LockSupport.parkNanos(LockSupport.java:215)
08.06 21:27:53 [Server] ERROR net.minecraft.server.v1_15_R1.IAsyncTaskHandler.bl(IAsyncTaskHandler.java:131)
08.06 21:27:53 [Server] ERROR net.minecraft.server.v1_15_R1.IAsyncTaskHandler.awaitTasks(IAsyncTaskHandler.java:120)
08.06 21:27:53 [Server] ERROR net.minecraft.server.v1_15_R1.ChunkProviderServer.getChunkAt(ChunkProviderServer.java:492)
08.06 21:27:53 [Server] ERROR net.minecraft.server.v1_15_R1.IChunkProvider.getChunkAt(SourceFile:16)
08.06 21:27:53 [Server] ERROR org.bukkit.craftbukkit.v1_15_R1.CraftWorld.getChunkAt(CraftWorld.java:402)
08.06 21:27:53 [Server] ERROR org.bukkit.craftbukkit.v1_15_R1.CraftWorld.getChunkAt(CraftWorld.java:1015)
08.06 21:27:53 [Server] ERROR org.bukkit.Location.getChunk(Location.java:123)
08.06 21:27:53 [Server] ERROR com.songoda.ultimatekits.handlers.DisplayItemHandler.displayItem(DisplayItemHandler.java:51)
08.06 21:27:53 [Server] ERROR com.songoda.ultimatekits.handlers.DisplayItemHandler.displayItems(DisplayItemHandler.java:37)
08.06 21:27:53 [Server] ERROR com.songoda.ultimatekits.handlers.DisplayItemHandler$$Lambda$3867/1306713599.run(Unknown Source)
08.06 21:27:53 [Server] ERROR org.bukkit.craftbukkit.v1_15_R1.scheduler.CraftTask.run(CraftTask.java:84)
08.06 21:27:53 [Server] ERROR org.bukkit.craftbukkit.v1_15_R1.scheduler.CraftScheduler.mainThreadHeartbeat(CraftScheduler.java:461)
08.06 21:27:53 [Server] ERROR net.minecraft.server.v1_15_R1.MinecraftServer.b(MinecraftServer.java:1263)
08.06 21:27:53 [Server] ERROR net.minecraft.server.v1_15_R1.DedicatedServer.b(DedicatedServer.java:430)
08.06 21:27:53 [Server] ERROR net.minecraft.server.v1_15_R1.MinecraftServer.a(MinecraftServer.java:1180)
08.06 21:27:53 [Server] ERROR net.minecraft.server.v1_15_R1.MinecraftServer.run(MinecraftServer.java:969)
08.06 21:27:53 [Server] ERROR java.lang.Thread.run(Thread.java:748)
08.06 21:27:53 [Server] ERROR ------------------------------
08.06 21:27:53 [Server] ERROR --- DO NOT REPORT THIS TO PAPER - THIS IS NOT A BUG OR A CRASH ---
08.06 21:27:53 [Server] ERROR ------------------------------
08.06 21:27:58 [Server] ERROR --- DO NOT REPORT THIS TO PAPER - THIS IS NOT A BUG OR A CRASH  - git-Paper-342 (MC: 1.15.2) ---
08.06 21:27:58 [Server] ERROR The server has not responded for 30 seconds! Creating thread dump
08.06 21:27:58 [Server] ERROR ------------------------------
08.06 21:27:58 [Server] ERROR Server thread dump (Look for plugins here before reporting to Paper!):
08.06 21:27:58 [Server] ERROR Chunk wait task info below: 
08.06 21:27:58 [Server] ERROR -59,64 in 'world:
08.06 21:27:58 [Server] ERROR Load Task - none
08.06 21:27:58 [Server] ERROR Save Task - none
08.06 21:27:58 [Server] ERROR Chunk Holder - non-null
08.06 21:27:58 [Server] ERROR Chunk Status - minecraft:full
08.06 21:27:58 [Server] ERROR Chunk Ticket Status - minecraft:full
08.06 21:27:58 [Server] ERROR Chunk Holder Status - minecraft:features
08.06 21:27:58 [Server] ERROR Chunk Holder Priority - 2
08.06 21:27:58 [Server] ERROR ------------------------------
08.06 21:27:58 [Server] ERROR Current Thread: Server thread
08.06 21:27:58 [Server] ERROR PID: 25 | Suspended: false | Native: false | State: TIMED_WAITING
08.06 21:27:58 [Server] ERROR Stack:
08.06 21:27:58 [Server] ERROR sun.misc.Unsafe.park(Native Method)
08.06 21:27:58 [Server] ERROR java.util.concurrent.locks.LockSupport.parkNanos(LockSupport.java:215)
08.06 21:27:58 [Server] ERROR net.minecraft.server.v1_15_R1.IAsyncTaskHandler.bl(IAsyncTaskHandler.java:131)
08.06 21:27:58 [Server] ERROR net.minecraft.server.v1_15_R1.IAsyncTaskHandler.awaitTasks(IAsyncTaskHandler.java:120)
08.06 21:27:58 [Server] ERROR net.minecraft.server.v1_15_R1.ChunkProviderServer.getChunkAt(ChunkProviderServer.java:492)
08.06 21:27:58 [Server] ERROR net.minecraft.server.v1_15_R1.IChunkProvider.getChunkAt(SourceFile:16)
08.06 21:27:58 [Server] ERROR org.bukkit.craftbukkit.v1_15_R1.CraftWorld.getChunkAt(CraftWorld.java:402)
08.06 21:27:58 [Server] ERROR org.bukkit.craftbukkit.v1_15_R1.CraftWorld.getChunkAt(CraftWorld.java:1015)
08.06 21:27:58 [Server] ERROR org.bukkit.Location.getChunk(Location.java:123)
08.06 21:27:58 [Server] ERROR com.songoda.ultimatekits.handlers.DisplayItemHandler.displayItem(DisplayItemHandler.java:51)
08.06 21:27:58 [Server] ERROR com.songoda.ultimatekits.handlers.DisplayItemHandler.displayItems(DisplayItemHandler.java:37)
08.06 21:27:58 [Server] ERROR com.songoda.ultimatekits.handlers.DisplayItemHandler$$Lambda$3867/1306713599.run(Unknown Source)
08.06 21:27:58 [Server] ERROR org.bukkit.craftbukkit.v1_15_R1.scheduler.CraftTask.run(CraftTask.java:84)
08.06 21:27:58 [Server] ERROR org.bukkit.craftbukkit.v1_15_R1.scheduler.CraftScheduler.mainThreadHeartbeat(CraftScheduler.java:461)
08.06 21:27:58 [Server] ERROR net.minecraft.server.v1_15_R1.MinecraftServer.b(MinecraftServer.java:1263)
08.06 21:27:58 [Server] ERROR net.minecraft.server.v1_15_R1.DedicatedServer.b(DedicatedServer.java:430)
08.06 21:27:58 [Server] ERROR net.minecraft.server.v1_15_R1.MinecraftServer.a(MinecraftServer.java:1180)
08.06 21:27:58 [Server] ERROR net.minecraft.server.v1_15_R1.MinecraftServer.run(MinecraftServer.java:969)
08.06 21:27:58 [Server] ERROR java.lang.Thread.run(Thread.java:748)
08.06 21:27:58 [Server] ERROR ------------------------------
08.06 21:27:58 [Server] ERROR --- DO NOT REPORT THIS TO PAPER - THIS IS NOT A BUG OR A CRASH ---
08.06 21:27:58 [Server] ERROR ------------------------------

08.06 21:27:59 [Server] ERROR ------------------------------
08.06 21:27:59 [Server] ERROR Current Thread: Server thread
08.06 21:27:59 [Server] ERROR PID: 25 | Suspended: false | Native: false | State: TIMED_WAITING
08.06 21:27:59 [Server] ERROR Stack:
08.06 21:27:59 [Server] ERROR sun.misc.Unsafe.park(Native Method)
08.06 21:27:59 [Server] ERROR java.util.concurrent.locks.LockSupport.parkNanos(LockSupport.java:215)
08.06 21:27:59 [Server] ERROR net.minecraft.server.v1_15_R1.IAsyncTaskHandler.bl(IAsyncTaskHandler.java:131)
08.06 21:27:59 [Server] ERROR net.minecraft.server.v1_15_R1.IAsyncTaskHandler.awaitTasks(IAsyncTaskHandler.java:120)
08.06 21:27:59 [Server] ERROR net.minecraft.server.v1_15_R1.ChunkProviderServer.getChunkAt(ChunkProviderServer.java:492)
08.06 21:27:59 [Server] ERROR net.minecraft.server.v1_15_R1.IChunkProvider.getChunkAt(SourceFile:16)
08.06 21:27:59 [Server] ERROR org.bukkit.craftbukkit.v1_15_R1.CraftWorld.getChunkAt(CraftWorld.java:402)
08.06 21:27:59 [Server] ERROR org.bukkit.craftbukkit.v1_15_R1.CraftWorld.getChunkAt(CraftWorld.java:1015)
08.06 21:27:59 [Server] ERROR org.bukkit.Location.getChunk(Location.java:123)
08.06 21:27:59 [Server] ERROR com.songoda.ultimatekits.handlers.DisplayItemHandler.displayItem(DisplayItemHandler.java:51)
08.06 21:27:59 [Server] ERROR com.songoda.ultimatekits.handlers.DisplayItemHandler.displayItems(DisplayItemHandler.java:37)
08.06 21:27:59 [Server] ERROR com.songoda.ultimatekits.handlers.DisplayItemHandler$$Lambda$3867/1306713599.run(Unknown Source)
08.06 21:27:59 [Server] ERROR org.bukkit.craftbukkit.v1_15_R1.scheduler.CraftTask.run(CraftTask.java:84)
08.06 21:27:59 [Server] ERROR org.bukkit.craftbukkit.v1_15_R1.scheduler.CraftScheduler.mainThreadHeartbeat(CraftScheduler.java:461)
08.06 21:27:59 [Server] ERROR net.minecraft.server.v1_15_R1.MinecraftServer.b(MinecraftServer.java:1263)
08.06 21:27:59 [Server] ERROR net.minecraft.server.v1_15_R1.DedicatedServer.b(DedicatedServer.java:430)
08.06 21:27:59 [Server] ERROR net.minecraft.server.v1_15_R1.MinecraftServer.a(MinecraftServer.java:1180)
08.06 21:27:59 [Server] ERROR net.minecraft.server.v1_15_R1.MinecraftServer.run(MinecraftServer.java:969)
08.06 21:27:59 [Server] ERROR java.lang.Thread.run(Thread.java:748)
08.06 21:27:59 [Server] ERROR ------------------------------
08.06 21:27:59 [Server] ERROR Entire Thread Dump:
08.06 21:27:59 [Server] ERROR ------------------------------
08.06 21:27:59 [Server] ERROR Current Thread: Server-Worker-9
08.06 21:27:59 [Server] ERROR PID: 207 | Suspended: false | Native: false | State: WAITING
08.06 21:27:59 [Server] ERROR Stack:
08.06 21:27:59 [Server] ERROR sun.misc.Unsafe.park(Native Method)
08.06 21:27:59 [Server] ERROR java.util.concurrent.locks.LockSupport.park(LockSupport.java:175)
08.06 21:27:59 [Server] ERROR java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.await(AbstractQueuedSynchronizer.java:2039)
08.06 21:27:59 [Server] ERROR java.util.concurrent.LinkedBlockingQueue.take(LinkedBlockingQueue.java:442)
08.06 21:27:59 [Server] ERROR java.util.concurrent.ThreadPoolExecutor.getTask(ThreadPoolExecutor.java:1074)
08.06 21:27:59 [Server] ERROR java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1134)
08.06 21:27:59 [Server] ERROR java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
08.06 21:27:59 [Server] ERROR java.lang.Thread.run(Thread.java:748)
08.06 21:27:59 [Server] ERROR ------------------------------
08.06 21:27:59 [Server] ERROR Current Thread: Head Conversion Thread - 2
08.06 21:27:59 [Server] ERROR PID: 206 | Suspended: false | Native: false | State: WAITING
08.06 21:27:59 [Server] ERROR Stack:
08.06 21:27:59 [Server] ERROR sun.misc.Unsafe.park(Native Method)
08.06 21:27:59 [Server] ERROR java.util.concurrent.locks.LockSupport.park(LockSupport.java:175)
08.06 21:27:59 [Server] ERROR java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.await(AbstractQueuedSynchronizer.java:2039)
08.06 21:27:59 [Server] ERROR java.util.concurrent.LinkedBlockingQueue.take(LinkedBlockingQueue.java:442)
08.06 21:27:59 [Server] ERROR java.util.concurrent.ThreadPoolExecutor.getTask(ThreadPoolExecutor.java:1074)
08.06 21:27:59 [Server] ERROR java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1134)
08.06 21:27:59 [Server] ERROR java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
08.06 21:27:59 [Server] ERROR java.lang.Thread.run(Thread.java:748)
08.06 21:27:59 [Server] ERROR ------------------------------
08.06 21:27:59 [Server] ERROR Current Thread: Head Conversion Thread - 1
08.06 21:27:59 [Server] ERROR PID: 205 | Suspended: false | Native: false | State: WAITING
08.06 21:27:59 [Server] ERROR Stack:
08.06 21:27:59 [Server] ERROR sun.misc.Unsafe.park(Native Method)
08.06 21:27:59 [Server] ERROR java.util.concurrent.locks.LockSupport.park(LockSupport.java:175)
08.06 21:27:59 [Server] ERROR java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.await(AbstractQueuedSynchronizer.java:2039)
08.06 21:27:59 [Server] ERROR java.util.concurrent.LinkedBlockingQueue.take(LinkedBlockingQueue.java:442)
08.06 21:27:59 [Server] ERROR java.util.concurrent.ThreadPoolExecutor.getTask(ThreadPoolExecutor.java:1074)
08.06 21:27:59 [Server] ERROR java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1134)
08.06 21:27:59 [Server] ERROR java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
08.06 21:27:59 [Server] ERROR java.lang.Thread.run(Thread.java:748)
08.06 21:27:59 [Server] ERROR ------------------------------
08.06 21:27:59 [Server] ERROR Current Thread: Head Conversion Thread - 0
08.06 21:27:59 [Server] ERROR PID: 203 | Suspended: false | Native: false | State: WAITING
08.06 21:27:59 [Server] ERROR Stack:
08.06 21:27:59 [Server] ERROR sun.misc.Unsafe.park(Native Method)
08.06 21:27:59 [Server] ERROR java.util.concurrent.locks.LockSupport.park(LockSupport.java:175)
08.06 21:27:59 [Server] ERROR java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.await(AbstractQueuedSynchronizer.java:2039)
08.06 21:27:59 [Server] ERROR java.util.concurrent.LinkedBlockingQueue.take(LinkedBlockingQueue.java:442)
08.06 21:27:59 [Server] ERROR java.util.concurrent.ThreadPoolExecutor.getTask(ThreadPoolExecutor.java:1074)
08.06 21:27:59 [Server] ERROR java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1134)
08.06 21:27:59 [Server] ERROR java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
08.06 21:27:59 [Server] ERROR java.lang.Thread.run(Thread.java:748)
08.06 21:27:59 [Server] ERROR ------------------------------
08.06 21:27:59 [Server] ERROR Current Thread: Async Chat Thread - #0
08.06 21:27:59 [Server] ERROR PID: 202 | Suspended: false | Native: false | State: TIMED_WAITING
08.06 21:27:59 [Server] ERROR Stack:
08.06 21:27:59 [Server] ERROR sun.misc.Unsafe.park(Native Method)
08.06 21:27:59 [Server] ERROR java.util.concurrent.locks.LockSupport.parkNanos(LockSupport.java:215)
08.06 21:27:59 [Server] ERROR java.util.concurrent.SynchronousQueue$TransferStack.awaitFulfill(SynchronousQueue.java:460)
08.06 21:27:59 [Server] ERROR java.util.concurrent.SynchronousQueue$TransferStack.transfer(SynchronousQueue.java:362)
08.06 21:27:59 [Server] ERROR java.util.concurrent.SynchronousQueue.poll(SynchronousQueue.java:941)
08.06 21:27:59 [Server] ERROR java.util.concurrent.ThreadPoolExecutor.getTask(ThreadPoolExecutor.java:1073)
08.06 21:27:59 [Server] ERROR java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1134)
08.06 21:27:59 [Server] ERROR java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
08.06 21:27:59 [Server] ERROR java.lang.Thread.run(Thread.java:748)
08.06 21:27:59 [Server] ERROR ------------------------------
08.06 21:27:59 [Server] ERROR Current Thread: pool-44-thread-1
08.06 21:27:59 [Server] ERROR PID: 201 | Suspended: false | Native: false | State: WAITING
08.06 21:27:59 [Server] ERROR Stack:

___Please do not make reports when the report says "DO NOT REPORT THIS TO PAPER". These are simply messages informing you of lag, to find what is causing it. Ask for tips on Discord or IRC instead.___

Plugin list:

INFO] Plugins (60): AdvancedAchievements, AdvancedNMotd, ajParkour, ArmorStandTools, AsyncWorldEdit, BetterSleeping, ChargedCreeper, Citizens, Cloaked, CommandSigns, CoreProtect, CraftBook, DeathMessagesPrime, DiscordSRV, 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, Votifier, VotingPlugin, WorldEdit, WorldGuard, WorldGuardExtraFlags

Actions to reproduce (if known):

Logging into the server and loading chunks.

Paper build number:

Please read title. My server auto updated the JAR to 1.5.2-342, and as soon as the reboot happened the server would crash on join.

I reverted back to 341, and the server is stable, no errors or anything now.

[aikar]

Well you'll have to stay on older build and miss out on the major performance boost, or remove var light for now.

I tried to accommodate that plugin but im not sure now if I really want to reduce performance for it, vs getting it to update to use ChunkAccess instead.

@flori-schwa could you please update the plugin to proxy IChunkAccess instead of IBlockAccess? The returned value is always IChunkAccess.

[MCHalfAssed]

I think I may disable Varlight until an update is released then. Disabling it should be all I need to do, correct? No need to completely uninstall it?

[flori-schwa]

working on a fix rn

[aikar]

Thank you. for us to fix this would of required undoing some pretty useful performance optimizations, and it wasn't even around the place the plugin touches either.

[flori-schwa]

I published this release which should fix the issue: https://github.com/flori-schwa/VarLight/releases/tag/1.11.2

[aikar]

:+1: looks like exactly what I expected :)