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From "Hudson (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HDFS-4633) TestDFSClientExcludedNodes fails sporadically if excluded nodes cache expires too quickly
Date Fri, 29 Mar 2013 12:58:49 GMT

    [ https://issues.apache.org/jira/browse/HDFS-4633?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13617315#comment-13617315
] 

Hudson commented on HDFS-4633:
------------------------------

Integrated in Hadoop-Hdfs-trunk #1358 (See [https://builds.apache.org/job/Hadoop-Hdfs-trunk/1358/])
    HDFS-4633 TestDFSClientExcludedNodes fails sporadically if excluded nodes cache expires
too quickly  (Chris Nauroth via Sanjay) (Revision 1461846)

     Result = FAILURE
sradia : http://svn.apache.org/viewcvs.cgi/?root=Apache-SVN&view=rev&rev=1461846
Files : 
* /hadoop/common/trunk/hadoop-hdfs-project/hadoop-hdfs/CHANGES.txt
* /hadoop/common/trunk/hadoop-hdfs-project/hadoop-hdfs/src/test/java/org/apache/hadoop/hdfs/TestDFSClientExcludedNodes.java

                
> TestDFSClientExcludedNodes fails sporadically if excluded nodes cache expires too quickly
> -----------------------------------------------------------------------------------------
>
>                 Key: HDFS-4633
>                 URL: https://issues.apache.org/jira/browse/HDFS-4633
>             Project: Hadoop HDFS
>          Issue Type: Bug
>          Components: hdfs-client, test
>    Affects Versions: 3.0.0
>            Reporter: Chris Nauroth
>            Assignee: Chris Nauroth
>             Fix For: 3.0.0
>
>         Attachments: HDFS-4633.1.patch, HDFS-4633.2.patch, HDFS-4633.3.patch
>
>
> {{TestDFSClientExcludedNodes}} simulates failures of individual data nodes in the client's
write pipeline and checks the client's ability to recover.  HDFS-4246 added support for periodic
"forgiveness" by caching the list of known bad data nodes with a periodic eviction.  The test
uses a 1 second cache expiration.  This sometimes causes failed nodes to be forgiven too fast
and violate the assumptions of the test.

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