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  1. Minecraft: Java Edition
  2. MC-243796

Random non fatal exceptions in console: Failed to store chunk ConcurrentModificationException

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    Description

      After upgrading my 1.17.1 server to 1.18 I started getting these errors.

      Does not crash the game but is concerning.

      [13:11:55] [IO-Worker-97/ERROR]: Failed to store chunk [1, -2]
      java.util.ConcurrentModificationException: null
          at java.util.HashMap$HashIterator.nextNode(HashMap.java:1597) ~[?:?]
          at java.util.HashMap$KeyIterator.next(HashMap.java:1620) ~[?:?]
          at oc.a(SourceFile:163) ~[server-1.18.jar:?]
          at oc.a(SourceFile:476) ~[server-1.18.jar:?]
          at oc.a(SourceFile:165) ~[server-1.18.jar:?]
          at oi.a(SourceFile:128) ~[server-1.18.jar:?]
          at oc.a(SourceFile:476) ~[server-1.18.jar:?]
          at oc.a(SourceFile:165) ~[server-1.18.jar:?]
          at oi.a(SourceFile:128) ~[server-1.18.jar:?]
          at oc.a(SourceFile:476) ~[server-1.18.jar:?]
          at oc.a(SourceFile:165) ~[server-1.18.jar:?]
          at om.a(SourceFile:118) ~[server-1.18.jar:?]
          at om.a(SourceFile:83) ~[server-1.18.jar:?]
          at crb.a(SourceFile:79) ~[server-1.18.jar:?]
          at cqy.a(SourceFile:174) ~[server-1.18.jar:?]
          at cqy.a(SourceFile:164) ~[server-1.18.jar:?]
          at aum$b.run(SourceFile:59) [server-1.18.jar:?]
          at auk.g(SourceFile:91) [server-1.18.jar:?]
          at auk.a(SourceFile:146) [server-1.18.jar:?]
          at auk.run(SourceFile:102) [server-1.18.jar:?]
          at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1136) [?:?]
          at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:635) [?:?]
          at java.lang.Thread.run(Thread.java:833) [?:?]

       

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            boq [Mojang] Bartosz Bok
            ezrareeves@gmail.com Ezra Reeves
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              Updated:
              Resolved: