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https://issues.apache.org/jira/browse/HDFS-4815?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Tian Hong Wang updated HDFS-4815:
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Attachment: HDFS-4815.patch
> Double call countReplicas() to fetch corruptReplicas and liveReplicas is not
> needed
> -----------------------------------------------------------------------------------
>
> Key: HDFS-4815
> URL: https://issues.apache.org/jira/browse/HDFS-4815
> Project: Hadoop HDFS
> Issue Type: Bug
> Reporter: Tian Hong Wang
> Assignee: Tian Hong Wang
> Attachments: HDFS-4815.patch
>
>
> In TestRBWBlockInvalidation, the original code is:
> while (!isCorruptReported) {
> if (countReplicas(namesystem, blk).corruptReplicas() > 0) {
> isCorruptReported = true;
> }
> Thread.sleep(100);
> }
> assertEquals("There should be 1 replica in the corruptReplicasMap", 1,
> countReplicas(namesystem, blk).corruptReplicas());
> Once the program detects there exists one corruptReplica, it will break the
> while loop. After that, it call countReplicas() again in assertEquals(). But
> sometimes I met the following error:
> java.lang.AssertionError: There should be 1 replica in the corruptReplicasMap
> expected:<1> but was:<0>
> It's obviously that second call countReplicas() in assertEquals(), the
> corruptReplicas value has been changed since program go to sleep and
> BlockManger recovered the block.
> So what I do is:
> 1) once detecting there exists one corruptReplica, break the loop and don't
> call sleep, the same as liveReplicas
> 2) don't double check the countReplicas & liveReplicas
> 3) sometime I meet the problem of testcase timeout, so I speed up the block
> report interval
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