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https://issues.apache.org/jira/browse/HDFS-5078?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13751556#comment-13751556
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Brandon Li commented on HDFS-5078:
----------------------------------

I manually tested the patch by appending data to a file after its stream was 
closed. 
After HDFS-5135 is fixed, we can create unit tests for new patches in the 
future instead of only manual tests.  
                
> Support file append in NFSv3 gateway to enable data streaming to HDFS
> ---------------------------------------------------------------------
>
>                 Key: HDFS-5078
>                 URL: https://issues.apache.org/jira/browse/HDFS-5078
>             Project: Hadoop HDFS
>          Issue Type: Sub-task
>          Components: nfs
>    Affects Versions: 3.0.0
>            Reporter: Brandon Li
>            Assignee: Brandon Li
>         Attachments: HDFS-5078.patch
>
>
> Currently NFS gateway closes an output stream after it's idle for certain 
> period (e.g., 10 seconds). The subsequent writes to the stream will fail. 
> This JIRA is to track the change to reopen an output stream to the same file 
> to append new data. This makes it possible for the application to directly 
> stream data to HDFS.  

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