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https://issues.apache.org/jira/browse/YARN-4365?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15025842#comment-15025842
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Hudson commented on YARN-4365:
------------------------------

FAILURE: Integrated in Hadoop-trunk-Commit #8882 (See 
[https://builds.apache.org/job/Hadoop-trunk-Commit/8882/])
YARN-4365. FileSystemNodeLabelStore should check for root dir existence (jlowe: 
rev f5acf94ecafb301a0cc8e8f91f19c8bcbc8da701)
* 
hadoop-yarn-project/hadoop-yarn/hadoop-yarn-common/src/test/java/org/apache/hadoop/yarn/nodelabels/TestFileSystemNodeLabelsStore.java
* hadoop-yarn-project/CHANGES.txt
* 
hadoop-yarn-project/hadoop-yarn/hadoop-yarn-common/src/main/java/org/apache/hadoop/yarn/nodelabels/FileSystemNodeLabelsStore.java


> FileSystemNodeLabelStore should check for root dir existence on startup
> -----------------------------------------------------------------------
>
>                 Key: YARN-4365
>                 URL: https://issues.apache.org/jira/browse/YARN-4365
>             Project: Hadoop YARN
>          Issue Type: Bug
>          Components: resourcemanager
>    Affects Versions: 2.7.2
>            Reporter: Jason Lowe
>            Assignee: Kuhu Shukla
>             Fix For: 2.6.3, 2.7.3
>
>         Attachments: YARN-4365-1.patch, YARN-4365-2.patch, YARN-4365-3.patch
>
>
> If the namenode is in safe mode for some reason then FileSystemNodeLabelStore 
> will prevent the RM from starting since it unconditionally tries to create 
> the root directory for the label store.  If the root directory already exists 
> and no labels are changing then we shouldn't prevent the RM from starting 
> even if the namenode is in safe mode.



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