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https://issues.apache.org/jira/browse/MAPREDUCE-7453?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17770535#comment-17770535
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ASF GitHub Bot commented on MAPREDUCE-7453:
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ayushtkn commented on PR #6102:
URL: https://github.com/apache/hadoop/pull/6102#issuecomment-1741258883
Another observation, the day this PR was reverted, some tests which were
broken since eternity broke again.
https://ci-hadoop.apache.org/job/hadoop-qbt-trunk-java8-linux-x86_64/1355/
& with this PR in they were passing:
https://ci-hadoop.apache.org/job/hadoop-qbt-trunk-java8-linux-x86_64/1354/testReport/junit/org.apache.hadoop.mapreduce.v2/TestMRJobs/testThreadDumpOnTaskTimeout/
So, some way this fixes those tests, that we should anyway fix
> Container logs are missing when yarn.app.container.log.filesize is set to
> default value 0.
> ------------------------------------------------------------------------------------------
>
> Key: MAPREDUCE-7453
> URL: https://issues.apache.org/jira/browse/MAPREDUCE-7453
> Project: Hadoop Map/Reduce
> Issue Type: Improvement
> Affects Versions: 3.3.6
> Reporter: zhengchenyu
> Assignee: zhengchenyu
> Priority: Major
> Labels: pull-request-available
> Fix For: 3.4.0
>
>
> Since HADOOP-18649, in container-log4j.properties,
> log4j.appender.\{APPENDER}.MaxFileSize is set to
> ${yarn.app.container.log.filesize}, but yarn.app.container.log.filesize is 0
> in default. So log is missing. This log is always rolling and only show the
> latest log.
> This is the running log like below:
> {code:java}
> Log Type: syslog
> Log Upload Time: Fri Sep 08 11:36:09 +0800 2023
> Log Length: 0
> Log Type: syslog.1
> Log Upload Time: Fri Sep 08 11:36:09 +0800 2023
> Log Length: 179
> 2023-09-08 11:31:34,494 INFO [AsyncDispatcher event handler]
> org.apache.hadoop.yarn.util.RackResolver: Got an error when resolve
> hostNames. Falling back to /default-rack for all. {code}
> Note: log4j.appender.\{APPENDER}.MaxFileSize is not set before, then use
> default value 10M, so no problem before HADOOP-18649
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