keith-turner opened a new issue, #4144:
URL: https://github.com/apache/accumulo/issues/4144
Seeing the following exception in the manager logs when running a version of
Accumulo built from the elasticity branch.
```
024-01-09T17:28:25,129 [threads.ThreadPools] ERROR: Non-critical scheduled
background task failed
java.util.concurrent.ExecutionException:
java.util.ConcurrentModificationException
at
java.base/java.util.concurrent.FutureTask.report(FutureTask.java:122) ~[?:?]
at
java.base/java.util.concurrent.FutureTask.get(FutureTask.java:191) ~[?:?]
at
org.apache.accumulo.core.util.threads.ThreadPools.checkTaskFailed(ThreadPools.java:125)
~[accumulo-core-4.0.0-SNAPSHOT.jar:4.0.0-SNAPSHOT]
at
org.apache.accumulo.core.util.threads.ThreadPools.lambda$static$0(ThreadPools.java:95)
~[accumulo-core-4.0.0-SNAPSHOT.jar:4.0.0-SNAPSHOT]
at java.base/java.lang.Iterable.forEach(Iterable.java:75) ~[?:?]
at
org.apache.accumulo.core.util.threads.ThreadPools.lambda$static$1(ThreadPools.java:92)
~[accumulo-core-4.0.0-SNAPSHOT.jar:4.0.0-SNAPSHOT]
at
org.apache.accumulo.core.trace.TraceWrappedRunnable.run(TraceWrappedRunnable.java:52)
~[accumulo-core-4.0.0-SNAPSHOT.jar:4.0.0-SNAPSHOT]
at
java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1128)
~[?:?]
at
java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:628)
~[?:?]
at
org.apache.accumulo.core.trace.TraceWrappedRunnable.run(TraceWrappedRunnable.java:52)
~[accumulo-core-4.0.0-SNAPSHOT.jar:4.0.0-SNAPSHOT]
at java.base/java.lang.Thread.run(Thread.java:829) [?:?]
Caused by: java.util.ConcurrentModificationException
at
java.base/java.util.HashMap$HashIterator.nextNode(HashMap.java:1511) ~[?:?]
at java.base/java.util.HashMap$KeyIterator.next(HashMap.java:1534)
~[?:?]
at com.google.common.collect.Sets$3$1.computeNext(Sets.java:907)
~[guava-33.0.0-jre.jar:?]
at
com.google.common.collect.AbstractIterator.tryToComputeNext(AbstractIterator.java:145)
~[guava-33.0.0-jre.jar:?]
at
com.google.common.collect.AbstractIterator.hasNext(AbstractIterator.java:140)
~[guava-33.0.0-jre.jar:?]
at java.base/java.lang.Iterable.forEach(Iterable.java:74) ~[?:?]
at
org.apache.accumulo.manager.compaction.coordinator.QueueMetrics.update(QueueMetrics.java:142)
~[accumulo-manager-4.0.0-SNAPSHOT.jar:4.0.0-SNAPSHOT]
at
org.apache.accumulo.core.trace.TraceWrappedRunnable.run(TraceWrappedRunnable.java:52)
~[accumulo-core-4.0.0-SNAPSHOT.jar:4.0.0-SNAPSHOT]
at
java.base/java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:515)
~[?:?]
at
java.base/java.util.concurrent.FutureTask.runAndReset(FutureTask.java:305)
~[?:?]
at
java.base/java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:305)
~[?:?]
... 4 more
```
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