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https://issues.apache.org/jira/browse/YARN-3850?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14604105#comment-14604105
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Hudson commented on YARN-3850:
------------------------------

FAILURE: Integrated in Hadoop-Yarn-trunk-Java8 #241 (See 
[https://builds.apache.org/job/Hadoop-Yarn-trunk-Java8/241/])
YARN-3850. NM fails to read files from full disks which can lead to container 
logs being lost and other issues. Contributed by Varun Saxena (jlowe: rev 
40b256949ad6f6e0dbdd248f2d257b05899f4332)
* 
hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-nodemanager/src/main/java/org/apache/hadoop/yarn/server/nodemanager/webapp/ContainerLogsUtils.java
* 
hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-nodemanager/src/test/java/org/apache/hadoop/yarn/server/nodemanager/webapp/TestContainerLogsPage.java
* 
hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-nodemanager/src/main/java/org/apache/hadoop/yarn/server/nodemanager/containermanager/launcher/RecoveredContainerLaunch.java
* 
hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-nodemanager/src/main/java/org/apache/hadoop/yarn/server/nodemanager/LocalDirsHandlerService.java
* hadoop-yarn-project/CHANGES.txt
* 
hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-nodemanager/src/test/java/org/apache/hadoop/yarn/server/nodemanager/containermanager/logaggregation/TestLogAggregationService.java
* 
hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-nodemanager/src/main/java/org/apache/hadoop/yarn/server/nodemanager/containermanager/logaggregation/AppLogAggregatorImpl.java


> NM fails to read files from full disks which can lead to container logs being 
> lost and other issues
> ---------------------------------------------------------------------------------------------------
>
>                 Key: YARN-3850
>                 URL: https://issues.apache.org/jira/browse/YARN-3850
>             Project: Hadoop YARN
>          Issue Type: Bug
>          Components: log-aggregation, nodemanager
>    Affects Versions: 2.7.0
>            Reporter: Varun Saxena
>            Assignee: Varun Saxena
>            Priority: Blocker
>             Fix For: 2.7.1
>
>         Attachments: YARN-3850.01.patch, YARN-3850.02.patch
>
>
> *Container logs* can be lost if disk has become full(~90% full).
> When application finishes, we upload logs after aggregation by calling 
> {{AppLogAggregatorImpl#uploadLogsForContainers}}. But this call in turns 
> checks the eligible directories on call to 
> {{LocalDirsHandlerService#getLogDirs}} which in case of disk full would 
> return nothing. So none of the container logs are aggregated and uploaded.
> But on application finish, we also call 
> {{AppLogAggregatorImpl#doAppLogAggregationPostCleanUp()}}. This deletes the 
> application directory which contains container logs. This is because it calls 
> {{LocalDirsHandlerService#getLogDirsForCleanup}} which returns the full disks 
> as well.
> So we are left with neither aggregated logs for the app nor the individual 
> container logs for the app.
> In addition to this, there are 2 more issues :
> # {{ContainerLogsUtil#getContainerLogDirs}} does not consider full disks so 
> NM will fail to serve up logs from full disks from its web interfaces.
> # {{RecoveredContainerLaunch#locatePidFile}} also does not consider full 
> disks so it is possible that on container recovery, PID file is not found.



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