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From "Xiao Chen (JIRA)" <j...@apache.org>
Subject [jira] [Created] (HDFS-12116) BlockReportTestBase#blockReport_08 and #blockReport_08 intermittently fail
Date Tue, 11 Jul 2017 05:58:00 GMT
Xiao Chen created HDFS-12116:

             Summary: BlockReportTestBase#blockReport_08 and #blockReport_08 intermittently
                 Key: HDFS-12116
                 URL: https://issues.apache.org/jira/browse/HDFS-12116
             Project: Hadoop HDFS
          Issue Type: Bug
          Components: test
    Affects Versions: 0.22.0
            Reporter: Xiao Chen
            Assignee: Xiao Chen

This seems to be long-standing, but the failure rate (~10%) is slightly higher in dist-test
run in using cdh.
In both _08 and _09 tests:
# an attempt is made to make a replica in {{TEMPORARY}}
 state, by {{waitForTempReplica}}.
# Once that's returned, the test goes on to verify block reports shows correct pending replication

But there's a race condition. If the replica is replicated between steps #1 and #2, {{getPendingReplicationBlocks}}
could return 0 or 1, depending on how many replicas are replicated, hence failing the test.

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