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https://issues.apache.org/jira/browse/HDFS-4971?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Jing Zhao updated HDFS-4971:
----------------------------

    Attachment: HDFS-4971.007.patch

Update the patch. Thanks Brandon for offline review, testing, and bug fix!
                
> Move IO operations out of locking in OpenFileCtx
> ------------------------------------------------
>
>                 Key: HDFS-4971
>                 URL: https://issues.apache.org/jira/browse/HDFS-4971
>             Project: Hadoop HDFS
>          Issue Type: Sub-task
>          Components: nfs
>            Reporter: Jing Zhao
>            Assignee: Jing Zhao
>         Attachments: HDFS-4971.000.patch, HDFS-4971.001.patch, 
> HDFS-4971.002.patch, HDFS-4971.003.patch, HDFS-4971.004.patch, 
> HDFS-4971.005.patch, HDFS-4971.006.patch, HDFS-4971.007.patch
>
>
> Currently some IO operations (such as writing data to HDFS and dumping to 
> local disk) in OpenFileCtx may hold a lock which can block processing 
> incoming writing requests. This jira aims to optimize OpenFileCtx and move 
> the IO operations out of the locking.

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