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From "Xiao Chen (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HDFS-9701) DN may deadlock when hot-swapping under load
Date Wed, 27 Jan 2016 16:51:40 GMT

    [ https://issues.apache.org/jira/browse/HDFS-9701?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15119761#comment-15119761

Xiao Chen commented on HDFS-9701:

Ah Good catch [~vinayrpet]! And thanks for reviewing. I added the second parameter to the
method solely for that reason, yet I didn't pass in the {{checkDirsMutex}}....
Patch 5 fixes this.

> DN may deadlock when hot-swapping under load
> --------------------------------------------
>                 Key: HDFS-9701
>                 URL: https://issues.apache.org/jira/browse/HDFS-9701
>             Project: Hadoop HDFS
>          Issue Type: Bug
>            Reporter: Xiao Chen
>            Assignee: Xiao Chen
>         Attachments: HDFS-9701.01.patch, HDFS-9701.02.patch, HDFS-9701.03.patch, HDFS-9701.04.patch,
> If the DN is under load (new blocks being written), a hot-swap task by {{hdfs dfsadmin
-reconfig}} may cause a dead lock.

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