Henri Biestro created HIVE-27733:
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             Summary: Intermittent ConcurrentModificationException in 
HiveServer2
                 Key: HIVE-27733
                 URL: https://issues.apache.org/jira/browse/HIVE-27733
             Project: Hive
          Issue Type: Bug
          Components: HiveServer2
    Affects Versions: 4.0.0-beta-1
            Reporter: Henri Biestro
            Assignee: Henri Biestro


Some tests sporadically fail with a cause that looks like:

Caused by: java.util.ConcurrentModificationException
        at java.util.HashMap$HashIterator.nextNode(HashMap.java:1493) ~[?:?]
        at java.util.HashMap$EntryIterator.next(HashMap.java:1526) ~[?:?]
        at java.util.HashMap$EntryIterator.next(HashMap.java:1524) ~[?:?]
        at java.util.AbstractCollection.toArray(AbstractCollection.java:200) 
~[?:?]
        at com.google.common.collect.Iterables.toArray(Iterables.java:285) 
~[hive-exec-3.1.3000.7.1.8.0-774.jar:3.1.3000.7.1.8.0-774]
        at com.google.common.collect.ImmutableMap.copyOf(ImmutableMap.java:451) 
~[hive-exec-3.1.3000.7.1.8.0-774.jar:3.1.3000.7.1.8.0-774]
        at com.google.common.collect.ImmutableMap.copyOf(ImmutableMap.java:436) 
~[hive-exec-3.1.3000.7.1.8.0-774.jar:3.1.3000.7.1.8.0-774]
        at 
org.apache.hadoop.hive.ql.log.PerfLogger.getEndTimes(PerfLogger.java:227) 
~[hive-exec-3.1.3000.7.1.8.0-774.jar:3.1.3000.7.1.8.0-774]
        at org.apache.hadoop.hive.ql.Driver.compileInternal(Driver.java:629) 
~[hive-exec-3.1.3000.7.1.8.0-774.jar:3.1.3000.7.1.8.0-774]
        at org.apache.hadoop.hive.ql.Driver.compileAndRespond(Driver.java:560) 
~[hive-exec-3.1.3000.7.1.8.0-774.jar:3.1.3000.7.1.8.0-774]
        at org.apache.hadoop.hive.ql.Driver.compileAndRespond(Driver.java:554) 
~[hive-exec-3.1.3000.7.1.8.0-774.jar:3.1.3000.7.1.8.0-774]
        at 
org.apache.hadoop.hive.ql.reexec.ReExecDriver.compileAndRespond(ReExecDriver.java:127)
 ~[hive-exec-3.1.3000.7.1.8.0-774.jar:3.1.3000.7.1.8.0-774]
        at 
org.apache.hive.service.cli.operation.SQLOperation.prepare(SQLOperation.java:200)
 ~[hive-service-3.1.3000.7.1.8.0-774.jar:3.1.3000.7.1.8.0-774]
        ... 51 more



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