keith-turner opened a new issue, #5356:
URL: https://github.com/apache/accumulo/issues/5356
**Describe the bug**
Observed the following stack trace in tablet server logs.
```
2025-02-24T23:05:56,261 [threads.ThreadPools] ERROR: Non-critical scheduled
background task failed
java.util.concurrent.ExecutionException: java.lang.NullPointerException:
Cannot invoke "java.util.concurrent.atomic.AtomicInteger.set(int)" because
"cem.running" is null
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:151)
~[accumulo-core-2.1.4-SNAPSHOT.jar:2.1.4-SNAPSHOT]
at
org.apache.accumulo.core.util.threads.ThreadPools$1.lambda$run$0(ThreadPools.java:120)
~[accumulo-core-2.1.4-SNAPSHOT.jar:2.1.4-SNAPSHOT]
at java.base/java.lang.Iterable.forEach(Iterable.java:75) ~[?:?]
at
org.apache.accumulo.core.util.threads.ThreadPools$1.run(ThreadPools.java:117)
~[accumulo-core-2.1.4-SNAPSHOT.jar:2.1.4-SNAPSHOT]
at
org.apache.accumulo.core.trace.TraceWrappedRunnable.run(TraceWrappedRunnable.java:52)
~[accumulo-core-2.1.4-SNAPSHOT.jar:2.1.4-SNAPSHOT]
at
java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1136)
~[?:?]
at
java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:635)
~[?:?]
at
org.apache.accumulo.core.trace.TraceWrappedRunnable.run(TraceWrappedRunnable.java:52)
~[accumulo-core-2.1.4-SNAPSHOT.jar:2.1.4-SNAPSHOT]
at java.base/java.lang.Thread.run(Thread.java:840) [?:?]
Caused by: java.lang.NullPointerException: Cannot invoke
"java.util.concurrent.atomic.AtomicInteger.set(int)" because "cem.running" is
null
at
org.apache.accumulo.tserver.metrics.CompactionExecutorsMetrics.lambda$update$4(CompactionExecutorsMetrics.java:148)
~[accumulo-tserver-2.1.4-SNAPSHOT.jar:2.1.4-SNAPSHOT]
at java.base/java.lang.Iterable.forEach(Iterable.java:75) ~[?:?]
at
org.apache.accumulo.tserver.metrics.CompactionExecutorsMetrics.update(CompactionExecutorsMetrics.java:147)
~[accumulo-tserver-2.1.4-SNAPSHOT.jar:2.1.4-SNAPSHOT]
at
org.apache.accumulo.core.trace.TraceWrappedRunnable.run(TraceWrappedRunnable.java:52)
~[accumulo-core-2.1.4-SNAPSHOT.jar:2.1.4-SNAPSHOT]
at
java.base/java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:539)
~[?:?]
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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