[jira] Issue Comment Edited: (HADOOP-4865) Trigger block scans for datanode

["Lei Xu (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/HADOOP-4865?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12679075#action_12679075 ] 

eddyxu edited comment on HADOOP-4865 at 3/4/09 10:43 PM:
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Hi, Raghu Angadi, which synchronized around manualScanList you mean? I change the synchronized to addManuallyScanBlocks(), however I think the synchronized around manualScanList in run() can not be removed. 

Or it should be use synchronized(this) in run() to modify manualScanList?



      was (Author: eddyxu):
    Hi, Raghu Angadi, which synchronized around manualScanList you mean? I change the synchronized to addManuallyScanBlocks() and addManuallyScanBlocks(), however I think the synchronized around manualScanList in run() can not be removed. 


  
> Trigger block scans for datanode
> --------------------------------
>
>                 Key: HADOOP-4865
>                 URL: https://issues.apache.org/jira/browse/HADOOP-4865
>             Project: Hadoop Core
>          Issue Type: New Feature
>          Components: dfs
>            Reporter: Brian Bockelman
>         Attachments: manual_block_scan.patch
>
>
> Provide a mechanism to trigger block scans in a datanode upon request.  Support interfaces for commands sent by the namenode and through the HTTP interface.

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