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https://issues.apache.org/jira/browse/HDFS-7048?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15971045#comment-15971045
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Weizhan Zeng commented on HDFS-7048:
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So, Is there anyone still working on it?

> Incorrect Dispatcher#Source wait/notify leads to early termination
> ------------------------------------------------------------------
>
>                 Key: HDFS-7048
>                 URL: https://issues.apache.org/jira/browse/HDFS-7048
>             Project: Hadoop HDFS
>          Issue Type: Sub-task
>          Components: balancer & mover
>    Affects Versions: 2.6.0, 2.7.0
>            Reporter: Andrew Wang
>            Assignee: Chengbing Liu
>         Attachments: HDFS-7048.01.patch
>
>
> Split off from HDFS-6621. The Balancer attempts to wake up scheduler threads 
> early as sources finish, but the synchronization with wait and notify is 
> incorrect. This ticks the failure count, which can lead to early termination.



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