mojira.dev
MC-77255

Server: ConcurrentModificationException

Happened two times on our server.
2 People playing, one just created the nether (first time) or
explorers the overworld (second time).

A lot of these are thrown until you stop the server with ^C

java.util.ConcurrentModificationException
at java.util.TreeMap$PrivateEntryIterator.nextEntry(TreeMap.java:1115)
at java.util.TreeMap$KeyIterator.next(TreeMap.java:1169)
at qu.a(SourceFile:574)
at qu.a(SourceFile:554)
at bfw.a(SourceFile:259)
at bfw.a(SourceFile:114)
at qt.b(SourceFile:160)
at qt.a(SourceFile:204)
at qu.a(SourceFile:766)
at net.minecraft.server.MinecraftServer.a(SourceFile:361)
at net.minecraft.server.MinecraftServer.s(SourceFile:384)
at pf.run(SourceFile:716)

Related issues

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CubeTheThird

Please attach the Complete crash report.

migrated

There is not more, it just repeats itself until you kill the server...

migrated

Also see newly attached files

[13:54:26] [Server Watchdog/FATAL]: Considering it to be crashed, server will forcibly shutdown.
[13:54:26] [Server Watchdog/ERROR]: This crash report has been saved to: [...]/crash-reports/crash-2015-02-05_13.54.26-server.txt
[13:54:26] [Server Shutdown Thread/INFO]: Stopping server
[13:54:26] [Server Shutdown Thread/INFO]: Saving players
java.util.ConcurrentModificationException
at java.util.TreeMap$PrivateEntryIterator.nextEntry(TreeMap.java:1115)
at java.util.TreeMap$KeyIterator.next(TreeMap.java:1169)
at qu.a(SourceFile:574)
at qu.a(SourceFile:554)
at bfw.a(SourceFile:259)
at bfw.a(SourceFile:114)
at qt.b(SourceFile:160)
at qt.a(SourceFile:204)
at qu.a(SourceFile:766)
at net.minecraft.server.MinecraftServer.a(SourceFile:361)
at net.minecraft.server.MinecraftServer.s(SourceFile:384)
at pf.run(SourceFile:716)
java.util.ConcurrentModificationException
at java.util.TreeMap$PrivateEntryIterator.nextEntry(TreeMap.java:1115)
at java.util.TreeMap$KeyIterator.next(TreeMap.java:1169)
at qu.a(SourceFile:574)
at qu.a(SourceFile:554)
at bfw.a(SourceFile:259)
at bfw.a(SourceFile:114)
at qt.b(SourceFile:160)
at qt.a(SourceFile:204)
at qu.a(SourceFile:766)
at net.minecraft.server.MinecraftServer.a(SourceFile:361)
at net.minecraft.server.MinecraftServer.s(SourceFile:384)
at pf.run(SourceFile:716)
java.util.ConcurrentModificationException
at java.util.TreeMap$PrivateEntryIterator.nextEntry(TreeMap.java:1115)
at java.util.TreeMap$KeyIterator.next(TreeMap.java:1169)
at qu.a(SourceFile:574)
at qu.a(SourceFile:554)
at bfw.a(SourceFile:259)
at bfw.a(SourceFile:114)
at qt.b(SourceFile:160)
at qt.a(SourceFile:204)
at qu.a(SourceFile:766)
at net.minecraft.server.MinecraftServer.a(SourceFile:361)
at net.minecraft.server.MinecraftServer.s(SourceFile:384)
at pf.run(SourceFile:716)
...
stop
^C

CubeTheThird

Ah, watchdog. Duplicate of MC-63590.

kumasasa

The watchdog terminating the server is only caused by the endless loop of ConcurrentModificationExceptions

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Duplicate of MC-63590 – If you have not, please use the search function in the future, to see if your bug has already been submitted.
For technical support, please use the Mojang Support Center.

--- This action was performed automagically. If you believe this was done erroneously, please :light_bulb_on: raise an issue.

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(Unassigned)

Community Consensus

Minecraft 1.8.1, Minecraft 1.8.8

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