keith-turner opened a new pull request, #4292:
URL: https://github.com/apache/accumulo/pull/4292
The following failure was observed when running ScanConsistencyIT in the
elasticity branch.
```
java.util.concurrent.ExecutionException: java.util.NoSuchElementException
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.test.ScanConsistencyIT.testConcurrentScanConsistency(ScanConsistencyIT.java:186)
at java.base/java.lang.reflect.Method.invoke(Method.java:566)
at java.base/java.util.concurrent.FutureTask.run(FutureTask.java:264)
at
java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1128)
at
java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:628)
at java.base/java.lang.Thread.run(Thread.java:829)
Caused by: java.util.NoSuchElementException
at
com.google.common.collect.MoreCollectors$ToOptionalState.getElement(MoreCollectors.java:163)
at
com.google.common.collect.MoreCollectors.lambda$static$1(MoreCollectors.java:75)
at
java.base/java.util.stream.ReferencePipeline.collect(ReferencePipeline.java:582)
at
org.apache.accumulo.test.ScanConsistencyIT$TableOpsTask.call(ScanConsistencyIT.java:685)
at
org.apache.accumulo.test.ScanConsistencyIT$TableOpsTask.call(ScanConsistencyIT.java:622)
... 4 more
```
This was caused by the test attempting to do a filter compaction when there
was currently no data to delete. Added a check for this case in this commit.
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