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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