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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 Mon, 17 Oct 2011 18:39:10 GMT

    [ https://issues.apache.org/jira/browse/HDFS-2452?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13129070#comment-13129070
] 

Konstantin Shvachko commented on HDFS-2452:
-------------------------------------------

Let's fix one thing at a time.
# AsynchronousCloseException handling was introduced to 0.23 in HDFS-2286. We can apply this
patch to 0.22, but it is mostly a nuisance rather than a bug.
# It could be better to check XceiverCount before starting the thread, but it should work
fine as it is now, because the check is done before actually executing the command. Please
file a separate jira on this if not filed already.
# Dynamic control of DataNode resources is a good idea. Probably worth a separate jira too.
                
> 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.patch
>
>
> OutOfMemoryError brings down DataNode, when DataXceiverServer tries to spawn a new data
transfer thread.

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