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From "Arpit Agarwal (JIRA)" <j...@apache.org>
Subject [jira] [Comment Edited] (HDFS-9330) Support reconfiguring dfs.datanode.duplicate.replica.deletion without DN restart
Date Wed, 27 Jan 2016 01:24:39 GMT

    [ https://issues.apache.org/jira/browse/HDFS-9330?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15118412#comment-15118412
] 

Arpit Agarwal edited comment on HDFS-9330 at 1/27/16 1:23 AM:
--------------------------------------------------------------

There is probably one more bug. The behavior of {{ReconfigurableBase}} is not consistent when
calling {{reconfigurePropertyImpl}}.

{{ReconfigurationThread#run}} does not update the value in the cached configuration object
whereas {{ReconfigurableBase#reconfigureProperty}} does. The contract of {{reconfigurePropertyImpl}}
does not specify who is supposed to update it.

You may want to hold off posting an updated patch for this and related Jiras until we get
this part answered.

Posted a question on HDFS-6808.


was (Author: arpitagarwal):
There is probably one more bug. The behavior of {{ReconfigurableBase}} is not consistent when
calling {{reconfigurePropertyImpl}}.

{{ReconfigurationThread#run}} does not update the value in the cached configuration object
whereas {{ReconfigurableBase#reconfigureProperty}} does. The contract of {{reconfigurePropertyImpl}}
does not specify who is supposed to update it.

You may want to hold off posting an updated patch for this and related Jiras until we get
this part answered.

> Support reconfiguring dfs.datanode.duplicate.replica.deletion without DN restart 
> ---------------------------------------------------------------------------------
>
>                 Key: HDFS-9330
>                 URL: https://issues.apache.org/jira/browse/HDFS-9330
>             Project: Hadoop HDFS
>          Issue Type: Sub-task
>          Components: datanode
>            Reporter: Xiaobing Zhou
>            Assignee: Xiaobing Zhou
>         Attachments: HDFS-9330-HDFS-9000.002.patch, HDFS-9330-HDFS-9000.003.patch, HDFS-9330.001.patch
>
>
> This is to reconfigure
> {code}
> dfs.datanode.duplicate.replica.deletion
> {code}
> without restarting DN.



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