apurtell opened a new pull request, #4468:
URL: https://github.com/apache/hbase/pull/4468
[ERROR]
org.apache.hadoop.hbase.master.normalizer.TestRegionNormalizerWorkQueue.testTake
Time elapsed: 0.065 s <<<
java.util.concurrent.ExecutionException:
java.util.ConcurrentModificationException
at
java.util.concurrent.CompletableFuture.reportGet(CompletableFuture.java:357)
at
java.util.concurrent.CompletableFuture.get(CompletableFuture.java:1928)
at
org.apache.hadoop.hbase.master.normalizer.TestRegionNormalizerWorkQueue.testTake(TestRegionNormalizerWorkQueue.java:211)
Caused by: java.util.ConcurrentModificationException
at
java.util.LinkedHashMap$LinkedHashIterator.nextNode(LinkedHashMap.java:719)
at
java.util.LinkedHashMap$LinkedKeyIterator.next(LinkedHashMap.java:742)
at
org.apache.hadoop.hbase.master.normalizer.RegionNormalizerWorkQueue.take(RegionNormalizerWorkQueue.java:192)
at
org.apache.hadoop.hbase.master.normalizer.TestRegionNormalizerWorkQueue.lambda$testTake$3(TestRegionNormalizerWorkQueue.java:192)
My impression after a quick read of the code is the separate locks `putLock`
and `takeLock` should be unified as a reentrant read-write lock.
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