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From "Arpit Agarwal (JIRA)" <j...@apache.org>
Subject [jira] [Comment Edited] (HDFS-7035) Make adding a new data directory to the DataNode an atomic operation and improve error handling
Date Wed, 27 Jan 2016 01:20:40 GMT

    [ https://issues.apache.org/jira/browse/HDFS-7035?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15118406#comment-15118406
] 

Arpit Agarwal edited comment on HDFS-7035 at 1/27/16 1:20 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.-

Ignore this, the comment was intended for HDFS-9330.


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.

> Make adding a new data directory to the DataNode an atomic operation and improve error
handling
> -----------------------------------------------------------------------------------------------
>
>                 Key: HDFS-7035
>                 URL: https://issues.apache.org/jira/browse/HDFS-7035
>             Project: Hadoop HDFS
>          Issue Type: Sub-task
>          Components: datanode
>    Affects Versions: 2.5.0
>            Reporter: Lei (Eddy) Xu
>            Assignee: Lei (Eddy) Xu
>              Labels: 2.6.1-candidate
>             Fix For: 2.7.0, 2.6.1
>
>         Attachments: HDFS-7035.000.combo.patch, HDFS-7035.000.patch, HDFS-7035.001.combo.patch,
HDFS-7035.001.patch, HDFS-7035.002.patch, HDFS-7035.003.patch, HDFS-7035.003.patch, HDFS-7035.004.patch,
HDFS-7035.005.patch, HDFS-7035.007.patch, HDFS-7035.008.patch, HDFS-7035.009.patch, HDFS-7035.010.patch,
HDFS-7035.010.patch, HDFS-7035.011.patch, HDFS-7035.012.patch, HDFS-7035.013.patch, HDFS-7035.014.patch,
HDFS-7035.015.patch, HDFS-7035.016.patch
>
>
> It refactors {{DataStorage}} and {{BlockPoolSliceStorage}} to reduce the duplicate code
and supports atomic adding volume operations. Also it parallels loading data volume operation:
each thread loads one volume.



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