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From "Xi Fang (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (HADOOP-9714) Branch-1-win TestReplicationPolicy failed caused by stale data node handling
Date Tue, 09 Jul 2013 22:41:48 GMT

     [ https://issues.apache.org/jira/browse/HADOOP-9714?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Xi Fang updated HADOOP-9714:
----------------------------

    Attachment: HADOOP-9714.1.patch
    
> Branch-1-win TestReplicationPolicy failed caused by stale data node handling
> ----------------------------------------------------------------------------
>
>                 Key: HADOOP-9714
>                 URL: https://issues.apache.org/jira/browse/HADOOP-9714
>             Project: Hadoop Common
>          Issue Type: Bug
>    Affects Versions: 1-win
>            Reporter: Xi Fang
>            Assignee: Xi Fang
>             Fix For: 1-win
>
>         Attachments: HADOOP-9714.1.patch
>
>
> Condor-Branch-1 TestReplicationPolicy failed on 
> * testChooseTargetWithMoreThanAvailableNodes()
> * testChooseTargetWithStaleNodes()
> * testChooseTargetWithHalfStaleNodes()
> The root of cause of testChooseTargetWithMoreThanAvailableNodes failing is the following:
> In BlockPlacementPolicyDefault#chooseTarget()
> {code}
>   chooseRandom(numOfReplicas, NodeBase.ROOT, excludedNodes, 
>         blocksize, maxNodesPerRack, results);
>     } catch (NotEnoughReplicasException e) {
>       FSNamesystem.LOG.warn("Not able to place enough replicas, still in need of " +
numOfReplicas);
> {code}
> However, numOfReplicas is passed into chooseRandom() as int (primitive type in java)
by value. The updating operation for numOfReplicas in chooseRandom() will not change the value
in chooseTarget(). 
> The root cause for testChooseTargetWithStaleNodes() and testChooseTargetWithHalfStaleNodes()
is the current BlockPlacementPolicyDefault#chooseTarget() doesn't check if a node is stale.
 

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