Uploaded image for project: 'Minecraft: Java Edition'
  1. Minecraft: Java Edition
  2. MC-149777

Crash when loading world: java.util.ConcurrentModificationException when using Java 11 or above

XMLWordPrintable

    • Icon: Bug Bug
    • Resolution: Fixed
    • 21w20a
    • Minecraft 1.14, Minecraft 1.14.1 Pre-Release 1, 1.15.2, 20w13b, 20w15a, 20w21a, 1.16 Pre-release 8, 1.16.1, 20w28a, 20w29a, 1.16.4 Pre-release 2, 20w46a
    • None
    • Java 11 or newer
    • Confirmed
    • Crash
    • Very Important

      When attempting to play attached world in Minecraft client, game may crash, then freeze. Doesn't always happen. Crash report is only printed in launcher, not saved.

      java.util.ConcurrentModificationException
      	at java.base/java.util.HashMap.computeIfAbsent(HashMap.java:1134)
      	at cje.b(SourceFile:67)
      	at cje.a(SourceFile:57)
      	at cff.a(SourceFile:98)
      	at cfi.a(SourceFile:86)
      	at java.base/java.util.stream.ReferencePipeline$4$1.accept(ReferencePipeline.java:212)
      	at java.base/java.util.ArrayList$ArrayListSpliterator.forEachRemaining(ArrayList.java:1654)
      	at java.base/java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:484)
      	at java.base/java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:474)
      	at java.base/java.util.stream.ReduceOps$ReduceOp.evaluateSequential(ReduceOps.java:913)
      	at java.base/java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234)
      	at java.base/java.util.stream.IntPipeline.reduce(IntPipeline.java:496)
      	at java.base/java.util.stream.IntPipeline.max(IntPipeline.java:459)
      	at cfi.a(SourceFile:86)
      	at cfd$c.a(SourceFile:175)
      	at java.base/java.util.stream.ReferencePipeline$4$1.accept(ReferencePipeline.java:212)
      	at java.base/java.util.ArrayList$ArrayListSpliterator.forEachRemaining(ArrayList.java:1654)
      	at java.base/java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:484)
      	at java.base/java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:474)
      	at java.base/java.util.stream.ReduceOps$ReduceOp.evaluateSequential(ReduceOps.java:913)
      	at java.base/java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234)
      	at java.base/java.util.stream.IntPipeline.reduce(IntPipeline.java:496)
      	at java.base/java.util.stream.IntPipeline.max(IntPipeline.java:459)
      	at cfd$c.a(SourceFile:176)
      	at cfd$c.<init>(SourceFile:98)
      	at cfd.a(SourceFile:280)
      	at cet.a(SourceFile:25)
      	at ces$a.a(SourceFile:89)
      	at bwy.a(SourceFile:187)
      	at bxc.d(SourceFile:44)
      	at bxc.a(SourceFile:199)
      	at us.a(SourceFile:461)
      	at com.mojang.datafixers.util.Either$Left.map(Either.java:38)
      	at us.a(SourceFile:455)
      	at java.base/java.util.concurrent.CompletableFuture$UniCompose.tryFire(CompletableFuture.java:1072)
      	at java.base/java.util.concurrent.CompletableFuture$Completion.run(CompletableFuture.java:478)
      	at uu.b(SourceFile:57)
      	at agk.e(SourceFile:83)
      	at agk.a(SourceFile:123)
      	at agk.run(SourceFile:91)
      	at java.base/java.util.concurrent.ForkJoinTask$RunnableExecuteAction.exec(ForkJoinTask.java:1426)
      	at java.base/java.util.concurrent.ForkJoinTask.doExec(ForkJoinTask.java:290)
      	at java.base/java.util.concurrent.ForkJoinPool$WorkQueue.topLevelExec(ForkJoinPool.java:1020)
      	at java.base/java.util.concurrent.ForkJoinPool.scan(ForkJoinPool.java:1656)
      	at java.base/java.util.concurrent.ForkJoinPool.runWorker(ForkJoinPool.java:1594)
      	at java.base/java.util.concurrent.ForkJoinWorkerThread.run(ForkJoinWorkerThread.java:177)
      

        1. 20w21a_log.txt
          12 kB
        2. crash-2020-04-04_20.04.06-server.txt
          5 kB
        3. crashreport.txt
          15 kB
        4. documentary.zip
          311 kB
        5. pre1.txt
          7 kB

            billy.sjoberg [Mojang] Billy Sjöberg
            laputan laputan
            Votes:
            45 Vote for this issue
            Watchers:
            28 Start watching this issue

              Created:
              Updated:
              Resolved:
              CHK: