java server crashes #3768

lfischer · 2025-11-21T20:43:53Z

lfischer
Nov 21, 2025

Hello,

I'm running a minecraft java server based on the simple docker compose example on an ubuntu server.
Since an image update few weeks ago, the server is just lagging and crashing.

I'm pretty sure, this is not related to your provided docker image, but maybe someone has an idea in which direction I need to dig to get this solved? (Kids are complaining already ;)

Alternatively: is switching back to an older tag possible, or is the server data now migrated to a non backward compatible content?

Thanks in advance!

latest.logs

[20:07:11] [Server thread/INFO]: Server empty for 60 seconds, pausing
[20:07:47] [User Authenticator #3/INFO]: UUID of player reschifl is ...
[20:07:47] [Server thread/INFO]: reschifl[/79.225.175.224:60415] logged in with entity id 40395 at (253.83860428079137, 115.0, 69.18135666704553)
[20:07:47] [Server thread/INFO]: reschifl joined the game
[20:07:57] [Server thread/WARN]: Can't keep up! Is the server overloaded? Running 9262ms or 185 ticks behind
[20:08:57] [Server Watchdog/ERROR]: A single server tick took 60.00 seconds (should be max 0.05)
[20:08:57] [Server Watchdog/ERROR]: Considering it to be crashed, server will forcibly shutdown.
[20:08:58] [Server Watchdog/ERROR]: This crash report has been saved to: /data/crash-reports/crash-2025-11-21_20.08.58-server.txt

crash-report:

---- Minecraft Crash Report ----
// Would you like a cupcake?

Time: 2025-11-21 20:08:58
Description: Watching Server

java.lang.Error: Watchdog
at enz.a(SourceFile:39)
at eoa.a(SourceFile:123)
at eoa$$Lambda/0x00007f9180fad6b8.accept(Unknown Source)
at eoa.a(SourceFile:66)
at eoa.b(SourceFile:123)
at eof.a(SourceFile:43)
at drq.a(SourceFile:675)
at dri.c(SourceFile:59)
at drb.c(SourceFile:23)
at dqy.a(SourceFile:64)
at dqy.a(SourceFile:50)
at cvr.g(SourceFile:146)
at awx.a(SourceFile:796)
at awx$$Lambda/0x00007f9180faa138.accept(Unknown Source)
at drq.a(SourceFile:498)
at awx.a(SourceFile:416)
at awx$$Lambda/0x00007f9180e12678.accept(Unknown Source)
at eob.a(SourceFile:54)
at awx.a(SourceFile:386)
at net.minecraft.server.MinecraftServer.c(SourceFile:1138)
at net.minecraft.server.MinecraftServer.a(SourceFile:1021)
at aro.a(SourceFile:321)
at net.minecraft.server.MinecraftServer.C(SourceFile:775)
at net.minecraft.server.MinecraftServer.a(SourceFile:297)
at net.minecraft.server.MinecraftServer$$Lambda/0x00007f9180d11168.run(Unknown Source)
at java.base@21.0.9/java.lang.Thread.runWith(Unknown Source)
at java.base@21.0.9/java.lang.Thread.run(Unknown Source)

A detailed walkthrough of the error, its code path and all known details is as follows:

-- Head --
Thread: Server Watchdog
Stacktrace:
at enz.a(SourceFile:39)
at eoa.a(SourceFile:123)
at eoa$$Lambda/0x00007f9180fad6b8.accept(Unknown Source)
at eoa.a(SourceFile:66)
at eoa.b(SourceFile:123)
at eof.a(SourceFile:43)
at drq.a(SourceFile:675)
at dri.c(SourceFile:59)
at drb.c(SourceFile:23)
at dqy.a(SourceFile:64)
at dqy.a(SourceFile:50)
at cvr.g(SourceFile:146)
at awx.a(SourceFile:796)
at awx$$Lambda/0x00007f9180faa138.accept(Unknown Source)
at drq.a(SourceFile:498)
at awx.a(SourceFile:416)
at awx$$Lambda/0x00007f9180e12678.accept(Unknown Source)
at eob.a(SourceFile:54)
at awx.a(SourceFile:386)
at net.minecraft.server.MinecraftServer.c(SourceFile:1138)
at net.minecraft.server.MinecraftServer.a(SourceFile:1021)
at aro.a(SourceFile:321)
at net.minecraft.server.MinecraftServer.C(SourceFile:775)
at net.minecraft.server.MinecraftServer.a(SourceFile:297)

-- Thread Dump --
Details:
Threads: "Reference Handler" daemon prio=10 Id=9 RUNNABLE
at java.base@21.0.9/java.lang.ref.Reference.waitForReferencePendingList(Native Method)
at java.base@21.0.9/java.lang.ref.Reference.processPendingReferences(Unknown Source)
at java.base@21.0.9/java.lang.ref.Reference$ReferenceHandler.run(Unknown Source)

"Finalizer" daemon prio=8 Id=10 WAITING on java.lang.ref.NativeReferenceQueue$Lock@648f3573
at java.base@21.0.9/java.lang.Object.wait0(Native Method)

waiting on java.lang.ref.NativeReferenceQueue$Lock@648f3573
at java.base@21.0.9/java.lang.Object.wait(Unknown Source)
at java.base@21.0.9/java.lang.Object.wait(Unknown Source)
at java.base@21.0.9/java.lang.ref.NativeReferenceQueue.await(Unknown Source)
at java.base@21.0.9/java.lang.ref.ReferenceQueue.remove0(Unknown Source)
at java.base@21.0.9/java.lang.ref.NativeReferenceQueue.remove(Unknown Source)
at java.base@21.0.9/java.lang.ref.Finalizer$FinalizerThread.run(Unknown Source)

"Signal Dispatcher" daemon prio=9 Id=11 RUNNABLE

"Notification Thread" daemon prio=9 Id=17 RUNNABLE

"Common-Cleaner" daemon prio=8 Id=18 TIMED_WAITING on java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject@6a7f6a88
at java.base@21.0.9/jdk.internal.misc.Unsafe.park(Native Method)

waiting on java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject@6a7f6a88
at java.base@21.0.9/java.util.concurrent.locks.LockSupport.parkNanos(Unknown Source)
at java.base@21.0.9/java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.await(Unknown Source)
at java.base@21.0.9/java.lang.ref.ReferenceQueue.await(Unknown Source)
at java.base@21.0.9/java.lang.ref.ReferenceQueue.remove0(Unknown Source)
at java.base@21.0.9/java.lang.ref.ReferenceQueue.remove(Unknown Source)
at java.base@21.0.9/jdk.internal.ref.CleanerImpl.run(Unknown Source)
at java.base@21.0.9/java.lang.Thread.runWith(Unknown Source)
...

"DestroyJavaVM" prio=5 Id=20 RUNNABLE

"JNA Cleaner" daemon prio=5 Id=28 TIMED_WAITING on java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject@58589cbc
at java.base@21.0.9/jdk.internal.misc.Unsafe.park(Native Method)

waiting on java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject@58589cbc
at java.base@21.0.9/java.util.concurrent.locks.LockSupport.parkNanos(Unknown Source)
at java.base@21.0.9/java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.await(Unknown Source)
at java.base@21.0.9/java.lang.ref.ReferenceQueue.await(Unknown Source)
at java.base@21.0.9/java.lang.ref.ReferenceQueue.remove0(Unknown Source)
at java.base@21.0.9/java.lang.ref.ReferenceQueue.remove(Unknown Source)
at com.sun.jna.internal.Cleaner$CleanerThread.run(Cleaner.java:154)

"Timer hack thread" daemon prio=5 Id=29 TIMED_WAITING
at java.base@21.0.9/java.lang.Thread.sleep0(Native Method)
at java.base@21.0.9/java.lang.Thread.sleep(Unknown Source)
at ag$11.run(SourceFile:986)

"Yggdrasil Key Fetcher" daemon prio=5 Id=30 TIMED_WAITING on java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject@62b2ff9d
at java.base@21.0.9/jdk.internal.misc.Unsafe.park(Native Method)

waiting on java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject@62b2ff9d
at java.base@21.0.9/java.util.concurrent.locks.LockSupport.parkNanos(Unknown Source)
at java.base@21.0.9/java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.awaitNanos(Unknown Source)
at java.base@21.0.9/java.util.concurrent.ScheduledThreadPoolExecutor$DelayedWorkQueue.take(Unknown Source)
at java.base@21.0.9/java.util.concurrent.ScheduledThreadPoolExecutor$DelayedWorkQueue.take(Unknown Source)
at java.base@21.0.9/java.util.concurrent.ThreadPoolExecutor.getTask(Unknown Source)
at java.base@21.0.9/java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source)
at java.base@21.0.9/java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
...

"Worker-Main-2" daemon prio=5 Id=34 WAITING on java.util.concurrent.ForkJoinPool@7f8b7a15
at java.base@21.0.9/jdk.internal.misc.Unsafe.park(Native Method)

waiting on java.util.concurrent.ForkJoinPool@7f8b7a15
at java.base@21.0.9/java.util.concurrent.locks.LockSupport.park(Unknown Source)
at java.base@21.0.9/java.util.concurrent.ForkJoinPool.awaitWork(Unknown Source)
at java.base@21.0.9/java.util.concurrent.ForkJoinPool.runWorker(Unknown Source)
at java.base@21.0.9/java.util.concurrent.ForkJoinWorkerThread.run(Unknown Source)

"Worker-Main-3" daemon prio=5 Id=35 TIMED_WAITING on java.util.concurrent.ForkJoinPool@7f8b7a15
at java.base@21.0.9/jdk.internal.misc.Unsafe.park(Native Method)

waiting on java.util.concurrent.ForkJoinPool@7f8b7a15
at java.base@21.0.9/java.util.concurrent.locks.LockSupport.parkUntil(Unknown Source)
at java.base@21.0.9/java.util.concurrent.ForkJoinPool.awaitWork(Unknown Source)
at java.base@21.0.9/java.util.concurrent.ForkJoinPool.runWorker(Unknown Source)
at java.base@21.0.9/java.util.concurrent.ForkJoinWorkerThread.run(Unknown Source)

"Server thread" prio=5 Id=36 RUNNABLE
at enz.a(SourceFile:39)
at eoa.a(SourceFile:123)
at eoa$$Lambda/0x00007f9180fad6b8.accept(Unknown Source)
at eoa.a(SourceFile:66)
at eoa.b(SourceFile:123)
at eof.a(SourceFile:43)
at drq.a(SourceFile:675)
at dri.c(SourceFile:59)
...

"Server console handler" daemon prio=5 Id=38 RUNNABLE (in native)
at java.base@21.0.9/java.io.FileInputStream.readBytes(Native Method)
at java.base@21.0.9/java.io.FileInputStream.read(Unknown Source)
at java.base@21.0.9/java.io.BufferedInputStream.read1(Unknown Source)
at java.base@21.0.9/java.io.BufferedInputStream.implRead(Unknown Source)
at java.base@21.0.9/java.io.BufferedInputStream.read(Unknown Source)
at java.base@21.0.9/sun.nio.cs.StreamDecoder.readBytes(Unknown Source)
at java.base@21.0.9/sun.nio.cs.StreamDecoder.implRead(Unknown Source)
at java.base@21.0.9/sun.nio.cs.StreamDecoder.lockedRead(Unknown Source)
...

Number of locked synchronizers = 3

java.util.concurrent.locks.ReentrantLock$NonfairSync@6e317446

java.util.concurrent.locks.ReentrantLock$NonfairSync@7290a840

java.util.concurrent.locks.ReentrantLock$NonfairSync@72bef98

"Netty Epoll Server IO #0" daemon prio=5 Id=39 RUNNABLE (in native)
at io.netty.channel.epoll.Native.epollWait(Native Method)
at io.netty.channel.epoll.Native.epollWait(Native.java:220)
at io.netty.channel.epoll.Native.epollWait(Native.java:213)
at io.netty.channel.epoll.EpollEventLoop.epollWaitNoTimerChange(EpollEventLoop.java:308)
at io.netty.channel.epoll.EpollEventLoop.run(EpollEventLoop.java:365)
at io.netty.util.concurrent.SingleThreadEventExecutor$4.run(SingleThreadEventExecutor.java:998)
at io.netty.util.internal.ThreadExecutorMap$2.run(ThreadExecutorMap.java:74)
at java.base@21.0.9/java.lang.Thread.runWith(Unknown Source)
...

"RCON Listener #1" prio=5 Id=40 RUNNABLE
at java.base@21.0.9/sun.nio.ch.Net.poll(Native Method)
at java.base@21.0.9/sun.nio.ch.NioSocketImpl.park(Unknown Source)
at java.base@21.0.9/sun.nio.ch.NioSocketImpl.timedAccept(Unknown Source)
at java.base@21.0.9/sun.nio.ch.NioSocketImpl.accept(Unknown Source)
at java.base@21.0.9/java.net.ServerSocket.implAccept(Unknown Source)
at java.base@21.0.9/java.net.ServerSocket.platformImplAccept(Unknown Source)
at java.base@21.0.9/java.net.ServerSocket.implAccept(Unknown Source)
at java.base@21.0.9/java.net.ServerSocket.implAccept(Unknown Source)
...

Number of locked synchronizers = 1

java.util.concurrent.locks.ReentrantLock$NonfairSync@235466ba

"Server Watchdog" daemon prio=5 Id=41 RUNNABLE
at java.management@21.0.9/sun.management.ThreadImpl.dumpThreads0(Native Method)
at java.management@21.0.9/sun.management.ThreadImpl.dumpAllThreads(Unknown Source)
at java.management@21.0.9/sun.management.ThreadImpl.dumpAllThreads(Unknown Source)
at arr.a(SourceFile:75)
at arr.run(SourceFile:47)
at java.base@21.0.9/java.lang.Thread.runWith(Unknown Source)
at java.base@21.0.9/java.lang.Thread.run(Unknown Source)

"Netty Epoll Server IO #1" daemon prio=5 Id=42 RUNNABLE (in native)
at io.netty.channel.epoll.Native.epollWait(Native Method)
at io.netty.channel.epoll.Native.epollWait(Native.java:220)
at io.netty.channel.epoll.Native.epollWait(Native.java:213)
at io.netty.channel.epoll.EpollEventLoop.epollWaitNoTimerChange(EpollEventLoop.java:308)
at io.netty.channel.epoll.EpollEventLoop.run(EpollEventLoop.java:365)
at io.netty.util.concurrent.SingleThreadEventExecutor$4.run(SingleThreadEventExecutor.java:998)
at io.netty.util.internal.ThreadExecutorMap$2.run(ThreadExecutorMap.java:74)
at java.base@21.0.9/java.lang.Thread.runWith(Unknown Source)
...

"Netty Epoll Server IO #2" daemon prio=5 Id=43 RUNNABLE (in native)
at io.netty.channel.epoll.Native.epollWait(Native Method)
at io.netty.channel.epoll.Native.epollWait(Native.java:220)
at io.netty.channel.epoll.Native.epollWait(Native.java:213)
at io.netty.channel.epoll.EpollEventLoop.epollWaitNoTimerChange(EpollEventLoop.java:308)
at io.netty.channel.epoll.EpollEventLoop.run(EpollEventLoop.java:365)
at io.netty.util.concurrent.SingleThreadEventExecutor$4.run(SingleThreadEventExecutor.java:998)
at io.netty.util.internal.ThreadExecutorMap$2.run(ThreadExecutorMap.java:74)
at java.base@21.0.9/java.lang.Thread.runWith(Unknown Source)
...

"Netty Epoll Server IO #3" daemon prio=5 Id=44 RUNNABLE (in native)
at io.netty.channel.epoll.Native.epollWait(Native Method)
at io.netty.channel.epoll.Native.epollWait(Native.java:220)
at io.netty.channel.epoll.Native.epollWait(Native.java:213)
at io.netty.channel.epoll.EpollEventLoop.epollWaitNoTimerChange(EpollEventLoop.java:308)
at io.netty.channel.epoll.EpollEventLoop.run(EpollEventLoop.java:365)
at io.netty.util.concurrent.SingleThreadEventExecutor$4.run(SingleThreadEventExecutor.java:998)
at io.netty.util.internal.ThreadExecutorMap$2.run(ThreadExecutorMap.java:74)
at java.base@21.0.9/java.lang.Thread.runWith(Unknown Source)
...

"Netty Epoll Server IO #4" daemon prio=5 Id=45 RUNNABLE (in native)
at io.netty.channel.epoll.Native.epollWait(Native Method)
at io.netty.channel.epoll.Native.epollWait(Native.java:220)
at io.netty.channel.epoll.Native.epollWait(Native.java:213)
at io.netty.channel.epoll.EpollEventLoop.epollWaitNoTimerChange(EpollEventLoop.java:308)
at io.netty.channel.epoll.EpollEventLoop.run(EpollEventLoop.java:365)
at io.netty.util.concurrent.SingleThreadEventExecutor$4.run(SingleThreadEventExecutor.java:998)
at io.netty.util.internal.ThreadExecutorMap$2.run(ThreadExecutorMap.java:74)
at java.base@21.0.9/java.lang.Thread.runWith(Unknown Source)
...

"IO-Worker-5" prio=5 Id=53 TIMED_WAITING on java.util.concurrent.SynchronousQueue$Transferer@46a2b5d2
at java.base@21.0.9/jdk.internal.misc.Unsafe.park(Native Method)

waiting on java.util.concurrent.SynchronousQueue$Transferer@46a2b5d2
at java.base@21.0.9/java.util.concurrent.locks.LockSupport.parkNanos(Unknown Source)
at java.base@21.0.9/java.util.concurrent.LinkedTransferQueue$DualNode.await(Unknown Source)
at java.base@21.0.9/java.util.concurrent.SynchronousQueue$Transferer.xferLifo(Unknown Source)
at java.base@21.0.9/java.util.concurrent.SynchronousQueue.xfer(Unknown Source)
at java.base@21.0.9/java.util.concurrent.SynchronousQueue.poll(Unknown Source)
at java.base@21.0.9/java.util.concurrent.ThreadPoolExecutor.getTask(Unknown Source)
at java.base@21.0.9/java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source)
...

"Netty Epoll Server IO #5" daemon prio=5 Id=54 RUNNABLE (in native)
at io.netty.channel.epoll.Native.epollWait(Native Method)
at io.netty.channel.epoll.Native.epollWait(Native.java:220)
at io.netty.channel.epoll.Native.epollWait(Native.java:213)
at io.netty.channel.epoll.EpollEventLoop.epollWaitNoTimerChange(EpollEventLoop.java:308)
at io.netty.channel.epoll.EpollEventLoop.run(EpollEventLoop.java:365)
at io.netty.util.concurrent.SingleThreadEventExecutor$4.run(SingleThreadEventExecutor.java:998)
at io.netty.util.internal.ThreadExecutorMap$2.run(ThreadExecutorMap.java:74)
at java.base@21.0.9/java.lang.Thread.runWith(Unknown Source)
...

"Netty Epoll Server IO #6" daemon prio=5 Id=55 RUNNABLE (in native)
at io.netty.channel.epoll.Native.epollWait(Native Method)
at io.netty.channel.epoll.Native.epollWait(Native.java:220)
at io.netty.channel.epoll.Native.epollWait(Native.java:213)
at io.netty.channel.epoll.EpollEventLoop.epollWaitNoTimerChange(EpollEventLoop.java:308)
at io.netty.channel.epoll.EpollEventLoop.run(EpollEventLoop.java:365)
at io.netty.util.concurrent.SingleThreadEventExecutor$4.run(SingleThreadEventExecutor.java:998)
at io.netty.util.internal.ThreadExecutorMap$2.run(ThreadExecutorMap.java:74)
at java.base@21.0.9/java.lang.Thread.runWith(Unknown Source)
...

"Netty Epoll Server IO #7" daemon prio=5 Id=56 RUNNABLE
at io.netty.channel.epoll.Native.epollWait0(Native Method)
at io.netty.channel.epoll.Native.epollWait(Native.java:193)
at io.netty.channel.epoll.EpollEventLoop.epollWait(EpollEventLoop.java:304)
at io.netty.channel.epoll.EpollEventLoop.run(EpollEventLoop.java:368)
at io.netty.util.concurrent.SingleThreadEventExecutor$4.run(SingleThreadEventExecutor.java:998)
at io.netty.util.internal.ThreadExecutorMap$2.run(ThreadExecutorMap.java:74)
at java.base@21.0.9/java.lang.Thread.runWith(Unknown Source)
at java.base@21.0.9/java.lang.Thread.run(Unknown Source)

"IO-Worker-6" prio=5 Id=60 TIMED_WAITING on java.util.concurrent.SynchronousQueue$Transferer@46a2b5d2
at java.base@21.0.9/jdk.internal.misc.Unsafe.park(Native Method)

waiting on java.util.concurrent.SynchronousQueue$Transferer@46a2b5d2
at java.base@21.0.9/java.util.concurrent.locks.LockSupport.parkNanos(Unknown Source)
at java.base@21.0.9/java.util.concurrent.LinkedTransferQueue$DualNode.await(Unknown Source)
at java.base@21.0.9/java.util.concurrent.SynchronousQueue$Transferer.xferLifo(Unknown Source)
at java.base@21.0.9/java.util.concurrent.SynchronousQueue.xfer(Unknown Source)
at java.base@21.0.9/java.util.concurrent.SynchronousQueue.poll(Unknown Source)
at java.base@21.0.9/java.util.concurrent.ThreadPoolExecutor.getTask(Unknown Source)
at java.base@21.0.9/java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source)
...

"IO-Worker-7" prio=5 Id=61 TIMED_WAITING on java.util.concurrent.SynchronousQueue$Transferer@46a2b5d2
at java.base@21.0.9/jdk.internal.misc.Unsafe.park(Native Method)

waiting on java.util.concurrent.SynchronousQueue$Transferer@46a2b5d2
at java.base@21.0.9/java.util.concurrent.locks.LockSupport.parkNanos(Unknown Source)
at java.base@21.0.9/java.util.concurrent.LinkedTransferQueue$DualNode.await(Unknown Source)
at java.base@21.0.9/java.util.concurrent.SynchronousQueue$Transferer.xferLifo(Unknown Source)
at java.base@21.0.9/java.util.concurrent.SynchronousQueue.xfer(Unknown Source)
at java.base@21.0.9/java.util.concurrent.SynchronousQueue.poll(Unknown Source)
at java.base@21.0.9/java.util.concurrent.ThreadPoolExecutor.getTask(Unknown Source)
at java.base@21.0.9/java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source)
...

"IO-Worker-8" prio=5 Id=62 TIMED_WAITING on java.util.concurrent.SynchronousQueue$Transferer@46a2b5d2
at java.base@21.0.9/jdk.internal.misc.Unsafe.park(Native Method)

waiting on java.util.concurrent.SynchronousQueue$Transferer@46a2b5d2
at java.base@21.0.9/java.util.concurrent.locks.LockSupport.parkNanos(Unknown Source)
at java.base@21.0.9/java.util.concurrent.LinkedTransferQueue$DualNode.await(Unknown Source)
at java.base@21.0.9/java.util.concurrent.SynchronousQueue$Transferer.xferLifo(Unknown Source)
at java.base@21.0.9/java.util.concurrent.SynchronousQueue.xfer(Unknown Source)
at java.base@21.0.9/java.util.concurrent.SynchronousQueue.poll(Unknown Source)
at java.base@21.0.9/java.util.concurrent.ThreadPoolExecutor.getTask(Unknown Source)
at java.base@21.0.9/java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source)
...

"Worker-Main-4" daemon prio=5 Id=66 WAITING on java.util.concurrent.ForkJoinPool@7f8b7a15
at java.base@21.0.9/jdk.internal.misc.Unsafe.park(Native Method)

waiting on java.util.concurrent.ForkJoinPool@7f8b7a15
at java.base@21.0.9/java.util.concurrent.locks.LockSupport.park(Unknown Source)
at java.base@21.0.9/java.util.concurrent.ForkJoinPool.awaitWork(Unknown Source)
at java.base@21.0.9/java.util.concurrent.ForkJoinPool.runWorker(Unknown Source)
at java.base@21.0.9/java.util.concurrent.ForkJoinWorkerThread.run(Unknown Source)

Stacktrace:
at arr.a(SourceFile:90)
at arr.run(SourceFile:47)
at java.base/java.lang.Thread.run(Unknown Source)

-- Performance stats --
Details:
Random tick rate: 3
Level stats: minecraft:overworld: players: 1, entities: 13256,13256,46,79,79,0,0 [minecraft:item:13148,minecraft:villager:30,minecraft:cow:18,minecraft:bat:10,minecraft:skeleton:8], block_entities: 223 [minecraft:sculk_sensor:99,minecraft:hopper:55,minecraft:sculk_catalyst:28,minecraft:furnace:13,minecraft:sign:11], block_ticks: 3, fluid_ticks: 0, chunk_source: Chunks[S] W: 1046 E: 13256,13256,46,79,79,0,0,
minecraft:the_nether: players: 0, entities: 0,0,0,0,0,0,0 [], block_entities: 0 [], block_ticks: 0, fluid_ticks: 0, chunk_source: Chunks[S] W: 0 E: 0,0,0,0,0,0,0,
minecraft:the_end: players: 0, entities: 0,0,0,0,0,0,0 [], block_entities: 0 [], block_ticks: 0, fluid_ticks: 0, chunk_source: Chunks[S] W: 0 E: 0,0,0,0,0,0,0

-- System Details --
Details:
Minecraft Version: 1.21.10
Minecraft Version ID: 1.21.10
Operating System: Linux (amd64) version 5.15.0-161-generic
Java Version: 21.0.9, Eclipse Adoptium
Java VM Version: OpenJDK 64-Bit Server VM (mixed mode, sharing), Eclipse Adoptium
Memory: 287334496 bytes (274 MiB) / 1073741824 bytes (1024 MiB) up to 2147483648 bytes (2048 MiB)
CPUs: 4
Processor Vendor: GenuineIntel
Processor Name: Intel Xeon Processor (Skylake, IBRS, no TSX)
Identifier: Intel64 Family 6 Model 85 Stepping 4
Microarchitecture: Skylake (Server)
Frequency (GHz): -0.00
Number of physical packages: 1
Number of physical CPUs: 4
Number of logical CPUs: 4
Graphics card #0 name: unknown
Graphics card #0 vendor: unknown
Graphics card #0 VRAM (MiB): 0.00
Graphics card #0 deviceId: unknown
Graphics card #0 versionInfo: unknown
Virtual memory max (MiB): 3873.67
Virtual memory used (MiB): 4625.68
Swap memory total (MiB): 0.00
Swap memory used (MiB): 0.00
Space in storage for jna.tmpdir (MiB):
Space in storage for org.lwjgl.system.SharedLibraryExtractPath (MiB):
Space in storage for io.netty.native.workdir (MiB):
Space in storage for java.io.tmpdir (MiB): available: 16944.43, total: 38122.11
Space in storage for workdir (MiB): available: 16944.43, total: 38122.11
JVM Flags: 2 total; -Xmx2G -Xms1G
Debug Flags: 0 total;
Server Running: true
Player Count: 1 / 10; [awy['reschifl'/40395, l='ServerLevel[world]', x=253.84, y=115.00, z=69.18]]
Active Data Packs: vanilla
Available Data Packs: minecart_improvements, redstone_experiments, trade_rebalance, vanilla
Enabled Feature Flags: minecraft:vanilla
World Generation: Stable
World Seed: -2978422657971062200
Suppressed Exceptions: ~~NONE~~
Is Modded: Probably not. Server jar signature and brand is untouched
Type: Dedicated Server (map_server.txt)

itzg · 2025-11-21T21:36:00Z

itzg
Nov 21, 2025
Maintainer

Changing to an older image tag won't make a difference since lil you said, Minecraft server crashes have nothing to do with the image or docker. FYI though

https://docker-minecraft-server.readthedocs.io/en/latest/versions/java/#image-tags

It looks like the server lagged so much that the watchdog killed it. Can you provide your container config, like compose file, and can see what suggestions from that?

0 replies

lfischer · 2025-11-21T22:14:45Z

lfischer
Nov 21, 2025
Author

Thank you for responding :)

This is my docker-compose.yml:
nothing really special

services:
mc:
image: itzg/minecraft-server
tty: true
stdin_open: true
ports:
- "25565:25565"
environment:
EULA: "TRUE"
MAX_MEMORY: 2G
DIFFICULTY: hard
OPS: |-
reschifl
ENABLE_WHITELIST: "true"
WHITELIST: |-
kid1
kid2
...
volumes:
# attach the relative directory 'data' to the container's /data path
- /data/minecraft-java/data:/data

5 replies

itzg Nov 21, 2025
Maintainer

If that kind of lag is temporary you could set MAX_TICK_TIME to a higher value. Or if the whole machine needs to sleep at times you could disable entirely by setting that to -1

FYI it's listed on this general section

https://docker-minecraft-server.readthedocs.io/en/latest/configuration/server-properties/#other-server-property-mappings

lfischer Nov 21, 2025
Author

Tried MAX_TICK_TIME -1
Watchdog is not killing the server, but it still shows massive lag for an unknown reason.

I noticed, that the server is keeping one CPU on 100% load, but others are idle. So seems to be depending to one single thread.

lfischer Nov 21, 2025
Author

update: after just waiting a few minutes, the situation is going to be fine for now.
CPU load and lag is gone.

Maybe this is just a one-time effect of the version upgrade or for the first player joining the server causing some initialization load?

lfischer Nov 21, 2025
Author

Thank you very much for your help and hint!
Will share an update when the kids and friends have tried to join the server and caused some real load :)

itzg Nov 21, 2025
Maintainer

Yeah a lot of game engines have to optimize their main loop to run in a single thread/core. Good theory about the upgrade and hopefully that was it.

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