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From "Hudson (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HDFS-6545) Finalizing rolling upgrade can make NN unavailable for a long duration
Date Wed, 18 Jun 2014 15:20:28 GMT

    [ https://issues.apache.org/jira/browse/HDFS-6545?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14035814#comment-14035814
] 

Hudson commented on HDFS-6545:
------------------------------

FAILURE: Integrated in Hadoop-Mapreduce-trunk #1805 (See [https://builds.apache.org/job/Hadoop-Mapreduce-trunk/1805/])
HDFS-6545. Finalizing rolling upgrade can make NN unavailable for a long duration. Contributed
by Kihwal Lee. (kihwal: http://svn.apache.org/viewcvs.cgi/?root=Apache-SVN&view=rev&rev=1603239)
* /hadoop/common/trunk/hadoop-hdfs-project/hadoop-hdfs/CHANGES.txt
* /hadoop/common/trunk/hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/namenode/FSNamesystem.java


> Finalizing rolling upgrade can make NN unavailable for a long duration
> ----------------------------------------------------------------------
>
>                 Key: HDFS-6545
>                 URL: https://issues.apache.org/jira/browse/HDFS-6545
>             Project: Hadoop HDFS
>          Issue Type: Improvement
>    Affects Versions: 2.4.0
>            Reporter: Kihwal Lee
>            Assignee: Kihwal Lee
>            Priority: Critical
>             Fix For: 3.0.0, 2.5.0
>
>         Attachments: HDFS-6545.patch, HDFS-6545.v2.patch
>
>
> In {{FSNamesystem#finalizeRollingUpgrade()}}, {{saveNamespace()}} is directly called.
 For name nodes with a big name space, it can take minutes to save a new fsimage.



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