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https://issues.apache.org/jira/browse/MAPREDUCE-6962?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16173064#comment-16173064
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Akira Ajisaka commented on MAPREDUCE-6962:
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I'm thinking the tasklog settings are no longer used, so we can remove the
settings and TaskLogAppender.
> Remove unused settings from log4j.properties
> --------------------------------------------
>
> Key: MAPREDUCE-6962
> URL: https://issues.apache.org/jira/browse/MAPREDUCE-6962
> Project: Hadoop Map/Reduce
> Issue Type: Bug
> Reporter: Akira Ajisaka
> Priority: Minor
> Labels: newbie
>
> {noformat:title=hadoop-common-project/hadoop-common/src/main/conf/log4j.properties}
> #Default values
> hadoop.tasklog.taskid=null
> hadoop.tasklog.iscleanup=false
> hadoop.tasklog.noKeepSplits=4
> hadoop.tasklog.totalLogFileSize=100
> hadoop.tasklog.purgeLogSplits=true
> hadoop.tasklog.logsRetainHours=12
> {noformat}
> hadoop.tasklog.noKeepSplits, purgeLogSplits, and logsRetainHours are not used
> anywhere and can be removed. These parameters were removed by HADOOP-1553 10
> years ago.
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