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From "Wei-Chiu Chuang (JIRA)" <j...@apache.org>
Subject [jira] [Created] (HDFS-9565) TestDistributedFileSystem.testLocatedFileStatusStorageIdsTypes is flaky
Date Wed, 16 Dec 2015 20:29:46 GMT
Wei-Chiu Chuang created HDFS-9565:
-------------------------------------

             Summary: TestDistributedFileSystem.testLocatedFileStatusStorageIdsTypes is flaky
                 Key: HDFS-9565
                 URL: https://issues.apache.org/jira/browse/HDFS-9565
             Project: Hadoop HDFS
          Issue Type: Bug
          Components: fs, test
    Affects Versions: 3.0.0
         Environment: Jenkins
            Reporter: Wei-Chiu Chuang
            Assignee: Wei-Chiu Chuang
            Priority: Minor


TestDistributedFileSystem.testLocatedFileStatusStorageIdsTypes occasionally fails with the
following error:
https://builds.apache.org/job/Hadoop-Hdfs-trunk-Java8/699/testReport/org.apache.hadoop.hdfs/TestDistributedFileSystem/testLocatedFileStatusStorageIdsTypes/
{noformat}
FAILED:  org.apache.hadoop.hdfs.TestDistributedFileSystem.testLocatedFileStatusStorageIdsTypes

Error Message:
Unexpected num storage ids expected:<2> but was:<1>

Stack Trace:
java.lang.AssertionError: Unexpected num storage ids expected:<2> but was:<1>
	at org.junit.Assert.fail(Assert.java:88)
	at org.junit.Assert.failNotEquals(Assert.java:743)
	at org.junit.Assert.assertEquals(Assert.java:118)
	at org.junit.Assert.assertEquals(Assert.java:555)
	at org.apache.hadoop.hdfs.TestDistributedFileSystem.testLocatedFileStatusStorageIdsTypes(TestDistributedFileSystem.java:855)

{noformat}

It appears that this test failed due to race condition: it does not wait for the file replication
to finish, before checking the file's status. 

This flaky test can be fixed by using DFSTestUtil.waitForReplication()



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