20w21a\: [^crash-2020-05-21_15.01.49-server.txt]
Description: Exception while ticking
java.util.ConcurrentModificationException
at java.util.HashMap$HashIterator.nextNode(HashMap.java:1429)
at java.util.HashMap$KeyIterator.next(HashMap.java:1453)
at yw.a(SourceFile:983)
at bpa.a(SourceFile:281)
at bpa.a(SourceFile:351)
at bwr.d(SourceFile:105)
at bxe.a(SourceFile:49)
at cei$a.a(SourceFile:856)
at yw.b(SourceFile:609)
at yw$$Lambda$3827/659711812.accept(Unknown Source)
at bpn.b(SourceFile:84)
at yw.a(SourceFile:351)
at net.minecraft.server.MinecraftServer.b(SourceFile:893)
at net.minecraft.server.MinecraftServer.a(SourceFile:832)
at enr.a(SourceFile:89)
at net.minecraft.server.MinecraftServer.run(SourceFile:691)
at java.lang.Thread.run(Thread.java:745)Linked issues
is duplicated by 1
Attachments
Comments 10
We do not have enough information to find the cause of this issue.
Please attach the crash report found in [crash-reports/crash-<DATE>-server.txt|http://hopper.minecraft.net/help/guides/finding-minecraft-data-folder] here.
This issue has been temporarily closed as Awaiting Response. Once the requested information has been delivered, the report will be reopened automatically.
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I came across the same error, unsure if related.
[media][media]
And yes, the server is vanilla. downloaded straight from the launcher.
Just had this same error, where our hosted server running with 4 GB of RAM immediately crashed upon a player loading in, with an Exception Ticking World error. No other players online, server had started only a few hours before (and is on a daily scheduled restart). No other players had connected to the server since the restart occurred, either. I'll attach the full crash report (crash-2019-11-12_15.14.34-server.txt).
Other similar bug reports (MC-148830, MC-148913) state that this might be related to chunk loading, but they're flagged as fixed/duplicates. They've got different error strings but also occurred when chunk loading was taking place.
Java version 1.8.0_131, OS Linux (amd64) version 4.9.166-xxxx-std-ipv6-64.
We had three of these crashes today.
[media][media][media]
We can't seem to pin it down to any specific player or object. We are running the vanilla 1.14.4 JAR, 16 GB on a hosted dedicated server.
I am encountering this issue again in 1.16.5 for the last couple of days (referenced in the duplicated MC-215598). It happens at a specific position somewhere related to the regions r.-2.0 and r.-1.0 which can be found in my recently attached crash log
[media], along with the necessary server files referenced within.
Are you hosting on your PC ? And have you made it ? Or are you hosting it on servers ?