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From "Chris Nauroth (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (HDFS-4633) TestDFSClientExcludedNodes fails sporadically if excluded nodes cache expires too quickly
Date Mon, 25 Mar 2013 19:37:15 GMT

     [ https://issues.apache.org/jira/browse/HDFS-4633?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Chris Nauroth updated HDFS-4633:
--------------------------------

    Component/s: test
    
> 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
>
> {{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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