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https://issues.apache.org/jira/browse/YARN-2755?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14190221#comment-14190221
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Hudson commented on YARN-2755:
------------------------------
FAILURE: Integrated in Hadoop-trunk-Commit #6393 (See
[https://builds.apache.org/job/Hadoop-trunk-Commit/6393/])
YARN-2755. NM fails to clean up usercache_DEL_<timestamp> dirs after YARN-661.
Contributed by Siqi Li (jlowe: rev 73e626ad91cd5c06a005068d8432fd16e06fe6a0)
*
hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-nodemanager/src/test/java/org/apache/hadoop/yarn/server/nodemanager/TestNodeManagerReboot.java
*
hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-nodemanager/src/main/java/org/apache/hadoop/yarn/server/nodemanager/containermanager/localizer/ResourceLocalizationService.java
* hadoop-yarn-project/CHANGES.txt
> NM fails to clean up usercache_DEL_<timestamp> dirs after YARN-661
> ------------------------------------------------------------------
>
> Key: YARN-2755
> URL: https://issues.apache.org/jira/browse/YARN-2755
> Project: Hadoop YARN
> Issue Type: Bug
> Reporter: Siqi Li
> Assignee: Siqi Li
> Priority: Critical
> Fix For: 2.6.0
>
> Attachments: YARN-2755.v1.patch, YARN-2755.v2.patch,
> YARN-2755.v3.patch, YARN-2755.v4.patch
>
>
> When NM restarts frequently due to some reason, a large number of directories
> like these left in /data/disk$num/yarn/local/:
> /data/disk1/yarn/local/usercache_DEL_1414372756105
> /data/disk1/yarn/local/usercache_DEL_1413557901696
> /data/disk1/yarn/local/usercache_DEL_1413657004894
> /data/disk1/yarn/local/usercache_DEL_1413675321860
> /data/disk1/yarn/local/usercache_DEL_1414093167936
> /data/disk1/yarn/local/usercache_DEL_1413565841271
> These directories are empty, but take up 100M+ due to the number of them.
> There were 38714 on the machine I looked at per data disk.
> It appears to be a regression introduced by YARN-661
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