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https://issues.apache.org/jira/browse/YARN-8273?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16484588#comment-16484588
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Robert Kanter commented on YARN-8273:
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+1 LGTM
> Log aggregation does not warn if HDFS quota in target directory is exceeded
> ---------------------------------------------------------------------------
>
> Key: YARN-8273
> URL: https://issues.apache.org/jira/browse/YARN-8273
> Project: Hadoop YARN
> Issue Type: Bug
> Components: log-aggregation
> Affects Versions: 3.1.0
> Reporter: Gergo Repas
> Assignee: Gergo Repas
> Priority: Major
> Attachments: YARN-8273.000.patch, YARN-8273.001.patch,
> YARN-8273.002.patch, YARN-8273.003.patch, YARN-8273.004.patch,
> YARN-8273.005.patch, YARN-8273.006.patch
>
>
> It appears that if an HDFS space quota is set on a target directory for log
> aggregation and the quota is already exceeded when log aggregation is
> attempted, zero-byte log files will be written to the HDFS directory, however
> NodeManager logs do not reflect a failure to write the files successfully
> (i.e. there are no ERROR or WARN messages to this effect).
> An improvement may be worth investigating to alert users to this scenario, as
> otherwise logs for a YARN application may be missing both on HDFS and locally
> (after local log cleanup is done) and the user may not otherwise be informed.
> Steps to reproduce:
> * Set a small HDFS space quota on /tmp/logs/username/logs (e.g. 2MB)
> * Write files to HDFS such that /tmp/logs/username/logs is almost 2MB full
> * Run a Spark or MR job in the cluster
> * Observe that zero byte files are written to HDFS after job completion
> * Observe that YARN container logs are also not present on the NM hosts (or
> are deleted after yarn.nodemanager.delete.debug-delay-sec)
> * Observe that no ERROR or WARN messages appear to be logged in the NM role
> log
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