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From "Hudson (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HDFS-9087) Add some jitter to DataNode.checkDiskErrorThread
Date Sun, 27 Sep 2015 06:16:04 GMT

    [ https://issues.apache.org/jira/browse/HDFS-9087?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14909621#comment-14909621
] 

Hudson commented on HDFS-9087:
------------------------------

SUCCESS: Integrated in Hadoop-Yarn-trunk-Java8 #453 (See [https://builds.apache.org/job/Hadoop-Yarn-trunk-Java8/453/])
HDFS-9087. Add some jitter to DataNode.checkDiskErrorThread (Elliott Clark via Colin P. McCabe)
(cmccabe: rev 0b31c237f2622e256726fc5d7698f0f195dbdbc1)
* hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/datanode/DataNode.java
* hadoop-hdfs-project/hadoop-hdfs/CHANGES.txt


> Add some jitter to DataNode.checkDiskErrorThread
> ------------------------------------------------
>
>                 Key: HDFS-9087
>                 URL: https://issues.apache.org/jira/browse/HDFS-9087
>             Project: Hadoop HDFS
>          Issue Type: Bug
>          Components: datanode
>    Affects Versions: 2.6.0
>            Reporter: Elliott Clark
>            Assignee: Elliott Clark
>         Attachments: HDFS-9087-v0.patch, HDFS-9087-v1.patch, HDFS-9087-v2.patch, HDFS-9087-v3.patch
>
>
> If all datanodes are started across a cluster at the same time (or errors in the network
cause ioexceptions) there can be storms where lots of datanodes check their disks at the exact
same time.



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