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https://issues.apache.org/jira/browse/YARN-1301?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13832571#comment-13832571
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Tsuyoshi OZAWA commented on YARN-1301:
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Firstly, I thought this logging should be done as DEBUG log. We can also choose 
to log blacklist additions/removals as INFO or WARN. What do you think?

> Need to log the blacklist additions/removals when YarnSchedule#allocate
> -----------------------------------------------------------------------
>
>                 Key: YARN-1301
>                 URL: https://issues.apache.org/jira/browse/YARN-1301
>             Project: Hadoop YARN
>          Issue Type: Bug
>            Reporter: Zhijie Shen
>            Assignee: Tsuyoshi OZAWA
>            Priority: Minor
>             Fix For: 2.3.0
>
>         Attachments: YARN-1301.1.patch, YARN-1301.2.patch, YARN-1301.3.patch
>
>
> Now without the log, it's hard to debug whether blacklist is updated on the 
> scheduler side or not



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