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https://issues.apache.org/jira/browse/YARN-3850?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Junping Du updated YARN-3850:
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Fix Version/s: 2.8.0
> 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
> Labels: 2.6.1-candidate
> Fix For: 2.6.1, 2.8.0, 2.7.1, 3.0.0-alpha1
>
> 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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