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From "Konstantin Shvachko (Commented) (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HDFS-2452) OutOfMemoryError in DataXceiverServer takes down the DataNode
Date Tue, 18 Oct 2011 02:46:11 GMT

    [ https://issues.apache.org/jira/browse/HDFS-2452?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13129439#comment-13129439
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Konstantin Shvachko commented on HDFS-2452:
-------------------------------------------

Can you mock datanode.getXceiverCount() to throw OutOfMemoryError on the second call. That
way the error will come from DataXceiver.run(). Also forgot to mention last time you do not
need to sleep(30sec) in the test. Checking alive once should be fine.
A javaDoc for the test description would be good to have.
Please don't do Patch Available for 0.22 pathces. This only triggers Jenkins build failures.
We will have to run test and test-patch locally anyway before committing.
                
> OutOfMemoryError in DataXceiverServer takes down the DataNode
> -------------------------------------------------------------
>
>                 Key: HDFS-2452
>                 URL: https://issues.apache.org/jira/browse/HDFS-2452
>             Project: Hadoop HDFS
>          Issue Type: Bug
>          Components: data-node
>    Affects Versions: 0.22.0
>            Reporter: Konstantin Shvachko
>            Assignee: Uma Maheswara Rao G
>             Fix For: 0.22.0
>
>         Attachments: HDFS-2452-22branch.1.patch, HDFS-2452-22branch.patch
>
>
> OutOfMemoryError brings down DataNode, when DataXceiverServer tries to spawn a new data
transfer thread.

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