[jira] [Created] (YARN-3850) Container logs can be lost if disk is full

["Varun Saxena (JIRA)" <ji...@apache.org>]

Varun Saxena created YARN-3850:
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             Summary: Container logs can be lost if disk is full
                 Key: YARN-3850
                 URL: https://issues.apache.org/jira/browse/YARN-3850
             Project: Hadoop YARN
          Issue Type: Bug
          Components: log-aggregation
    Affects Versions: 2.7.0
            Reporter: Varun Saxena
            Assignee: Varun Saxena
            Priority: Blocker


*Container logs* can be lost if disk has become bad(become 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.



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