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https://issues.apache.org/jira/browse/YARN-6708?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16060485#comment-16060485
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Bibin A Chundatt commented on YARN-6708:
----------------------------------------
cc:/ [~jlowe].
> Nodemanager container crash after ext3 folder limit
> ---------------------------------------------------
>
> Key: YARN-6708
> URL: https://issues.apache.org/jira/browse/YARN-6708
> Project: Hadoop YARN
> Issue Type: Bug
> Reporter: Bibin A Chundatt
> Assignee: Bibin A Chundatt
> Priority: Critical
> Attachments: YARN-6708.001.patch, YARN-6708.002.patch,
> YARN-6708.003.patch
>
>
> Configure umask as *027* for nodemanager service user
> and {{yarn.nodemanager.local-cache.max-files-per-directory}} as {{40}}. After
> 4 *private* dir localization next directory will be *0/14*
> Local Directory cache manager
> {code}
> vm2:/opt/hadoop/release/data/nmlocal/usercache/mapred/filecache # l
> total 28
> drwx--x--- 7 mapred hadoop 4096 Jun 10 14:35 ./
> drwxr-s--- 4 mapred hadoop 4096 Jun 10 12:07 ../
> drwxr-x--- 3 mapred users 4096 Jun 10 14:36 0/
> drwxr-xr-x 3 mapred users 4096 Jun 10 12:15 10/
> drwxr-xr-x 3 mapred users 4096 Jun 10 12:22 11/
> drwxr-xr-x 3 mapred users 4096 Jun 10 12:27 12/
> drwxr-xr-x 3 mapred users 4096 Jun 10 12:31 13/
> {code}
> *drwxr-x---* 3 mapred users 4096 Jun 10 14:36 0/ is only *750*
> Nodemanager user will not be able check for localization path exists or not.
> {{LocalResourcesTrackerImpl}}
> {code}
> case REQUEST:
> if (rsrc != null && (!isResourcePresent(rsrc))) {
> LOG.info("Resource " + rsrc.getLocalPath()
> + " is missing, localizing it again");
> removeResource(req);
> rsrc = null;
> }
> if (null == rsrc) {
> rsrc = new LocalizedResource(req, dispatcher);
> localrsrc.put(req, rsrc);
> }
> break;
> {code}
> *isResourcePresent* will always return false and same resource will be
> localized to {{0}} to next unique number
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