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https://issues.apache.org/jira/browse/YARN-5096?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15292049#comment-15292049
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Varun Saxena commented on YARN-5096:
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[~sjlee0], ColumnHelper has another null prefix log at line 262.
Probably we should make that DEBUG as well. It appears in my testing, probably
for configs. Doesnt seem useful.
> timelinereader has a lot of logging that's not useful
> -----------------------------------------------------
>
> Key: YARN-5096
> URL: https://issues.apache.org/jira/browse/YARN-5096
> Project: Hadoop YARN
> Issue Type: Sub-task
> Components: timelineserver
> Affects Versions: YARN-2928
> Reporter: Sangjin Lee
> Assignee: Sangjin Lee
> Priority: Minor
> Labels: yarn-2928-1st-milestone
> Fix For: YARN-2928
>
> Attachments: YARN-5096-YARN-2928.01.patch
>
>
> After running about a dozen or so requests, the timelinereader log is filled
> with the following logging entries:
> {noformat}
> 2016-05-16 15:59:13,364 INFO
> org.apache.hadoop.yarn.server.timelineservice.storage.common.ColumnHelper:
> null prefix was specified; returning all columns
> 2016-05-16 15:59:13,364 INFO
> org.apache.hadoop.yarn.server.timelineservice.storage.common.ColumnHelper:
> null prefix was specified; returning all columns
> 2016-05-16 15:59:13,364 INFO
> org.apache.hadoop.yarn.server.timelineservice.storage.common.ColumnHelper:
> null prefix was specified; returning all columns
> 2016-05-16 15:59:13,364 INFO
> org.apache.hadoop.yarn.server.timelineservice.storage.common.ColumnHelper:
> null prefix was specified; returning all columns
> 2016-05-16 15:59:13,364 INFO
> org.apache.hadoop.yarn.server.timelineservice.storage.common.ColumnHelper:
> null prefix was specified; returning all columns
> 2016-05-16 15:59:13,364 INFO
> org.apache.hadoop.yarn.server.timelineservice.storage.common.ColumnHelper:
> null prefix was specified; returning all columns
> 2016-05-16 15:59:13,364 INFO
> org.apache.hadoop.yarn.server.timelineservice.storage.common.ColumnHelper:
> null prefix was specified; returning all columns
> 2016-05-16 15:59:13,364 INFO
> org.apache.hadoop.yarn.server.timelineservice.storage.common.ColumnHelper:
> null prefix was specified; returning all columns
> 2016-05-16 15:59:13,364 INFO
> org.apache.hadoop.yarn.server.timelineservice.storage.common.ColumnHelper:
> null prefix was specified; returning all columns
> {noformat}
> There were some ~ 3,000 such logging entries. It's too excessive.
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