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From "Stephen Yuan Jiang (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HBASE-13831) TestHBaseFsck#testParallelHbck is flaky
Date Wed, 03 Jun 2015 22:30:38 GMT

    [ https://issues.apache.org/jira/browse/HBASE-13831?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14571764#comment-14571764

Stephen Yuan Jiang commented on HBASE-13831:

The failed TestReplicationKillSlaveRS.xml test has nothing to do with this patch.

> TestHBaseFsck#testParallelHbck is flaky
> ---------------------------------------
>                 Key: HBASE-13831
>                 URL: https://issues.apache.org/jira/browse/HBASE-13831
>             Project: HBase
>          Issue Type: Bug
>          Components: hbck, test
>    Affects Versions: 2.0.0, 1.1.0, 1.2.0
>            Reporter: Stephen Yuan Jiang
>            Assignee: Stephen Yuan Jiang
>            Priority: Minor
>             Fix For: 2.0.0, 1.2.0, 1.1.1
>         Attachments: HBASE-13831.patch
> Running TestHBaseFsck#testParallelHbck is flaky against HADOOP-2.6+ environment.  The
idea of the test is that with when 2 HBCK operations are running simultaneously, the 2nd HBCK
would fail with no-retry because creating lock file would fail due to the 1st HBCK already
created.  However, with HADOOP-2.6+, the FileSystem#createFile call internally retries with
AlreadyBeingCreatedException (see HBASE-13574 for more details: "It seems that test is broken
due of the new create retry policy in hadoop 2.6. Namenode proxy now created with custom RetryPolicy
for AlreadyBeingCreatedException which is implies timeout on this operations up to HdfsConstants.LEASE_SOFTLIMIT_PERIOD
> When I run the TestHBaseFsck#testParallelHbck test against HADOOP-2.7 in a Windows environment
(HBASE is branch-1.1) multiple times, the result is unpredictable (sometime succeeded, sometime
failed - more failure than succeeded).  
> The fix is trivial: Leverage the change in HBASE-13732 and reduce the max wait time to
a smaller number.   

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