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From "Hudson (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HDFS-7283) Bump DataNode OOM log from WARN to ERROR
Date Fri, 24 Oct 2014 17:52:34 GMT

    [ https://issues.apache.org/jira/browse/HDFS-7283?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14183128#comment-14183128
] 

Hudson commented on HDFS-7283:
------------------------------

FAILURE: Integrated in Hadoop-trunk-Commit #6333 (See [https://builds.apache.org/job/Hadoop-trunk-Commit/6333/])
HDFS-7283. Bump DataNode OOM log from WARN to ERROR. Contributed by Stephen Chu. (wheat9:
rev b3d8a642a938da9de680b479585a7c2014b8965c)
* hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/datanode/DataXceiverServer.java
* hadoop-hdfs-project/hadoop-hdfs/CHANGES.txt


> Bump DataNode OOM log from WARN to ERROR
> ----------------------------------------
>
>                 Key: HDFS-7283
>                 URL: https://issues.apache.org/jira/browse/HDFS-7283
>             Project: Hadoop HDFS
>          Issue Type: Improvement
>          Components: datanode
>    Affects Versions: 2.0.0-alpha
>            Reporter: Stephen Chu
>            Assignee: Stephen Chu
>            Priority: Trivial
>              Labels: supportability
>             Fix For: 2.7.0
>
>         Attachments: HDFS-7283.1.patch
>
>
> When the DataNode OOMs, it logs the following WARN message which should be bumped up
to ERROR because DataNode OOM often leads to DN process abortion.
> {code}
> WARN org.apache.hadoop.hdfs.server.datanode.DataNode: DataNode is out of memory. Will
retry in 30 seconds. 
> 4751 java.lang.OutOfMemoryError: unable to create new native thread"
> {code}
> Thanks to Roland Teague for identifying this.



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