keith-turner opened a new pull request, #5020:
URL: https://github.com/apache/accumulo/pull/5020
Fixes the following NPE seen during local testing
```
java.util.concurrent.ExecutionException: java.lang.NullPointerException:
Cannot invoke
"io.micrometer.core.instrument.MeterRegistry.gauge(io.micrometer.core.instrument.Meter$Id,
Object, java.util.function.ToDoubleFunction)" because "registry" is null
at java.base/java.util.concurrent.FutureTask.report(FutureTask.java:122)
at java.base/java.util.concurrent.FutureTask.get(FutureTask.java:191)
at
org.apache.accumulo.core.util.threads.ThreadPools.checkTaskFailed(ThreadPools.java:143)
at
org.apache.accumulo.core.util.threads.ThreadPools.lambda$static$0(ThreadPools.java:113)
at java.base/java.lang.Iterable.forEach(Iterable.java:75)
at
org.apache.accumulo.core.util.threads.ThreadPools.lambda$static$1(ThreadPools.java:110)
at
org.apache.accumulo.core.trace.TraceWrappedRunnable.run(TraceWrappedRunnable.java:52)
at
java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1136)
at
java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:635)
at
org.apache.accumulo.core.trace.TraceWrappedRunnable.run(TraceWrappedRunnable.java:52)
at java.base/java.lang.Thread.run(Thread.java:840)
Caused by: java.lang.NullPointerException: Cannot invoke
"io.micrometer.core.instrument.MeterRegistry.gauge(io.micrometer.core.instrument.Meter$Id,
Object, java.util.function.ToDoubleFunction)" because "registry" is null
at io.micrometer.core.instrument.Gauge$Builder.register(Gauge.java:195)
at
org.apache.accumulo.manager.compaction.coordinator.QueueMetrics.update(QueueMetrics.java:165)
at
org.apache.accumulo.core.trace.TraceWrappedRunnable.run(TraceWrappedRunnable.java:52)
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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