Tao Luo created HDFS-4925:
-----------------------------

             Summary: TestQuorumJournalManager.testPurgeLogs intermittently 
Fails assertNoThreadsMatching
                 Key: HDFS-4925
                 URL: https://issues.apache.org/jira/browse/HDFS-4925
             Project: Hadoop HDFS
          Issue Type: Bug
          Components: qjm, test
    Affects Versions: 3.0.0
            Reporter: Tao Luo
            Priority: Minor


On Jenkins, I saw this assert fail in the @After shutdown() for 
TestQuorumJournalManager.testPurgeLogs():

{code}    // Should not leak clients between tests -- this can cause flaky 
tests.
    // (See HDFS-4643)
    GenericTestUtils.assertNoThreadsMatching(".*IPC Client.*");
{code}

https://builds.apache.org/job/PreCommit-HDFS-Build/4546//testReport/

I could not reproduce locally.


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