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From "Robert Joseph Evans (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HDFS-3696) Create files with WebHdfsFileSystem goes OOM when file size is big
Date Thu, 26 Jul 2012 14:57:34 GMT

    [ https://issues.apache.org/jira/browse/HDFS-3696?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13423124#comment-13423124
] 

Robert Joseph Evans commented on HDFS-3696:
-------------------------------------------

Comment Thanks for the patch for branch-0.23.  +1 (non-binding) for it. I reviewed the change
and ran the tests.
                
> Create files with WebHdfsFileSystem goes OOM when file size is big
> ------------------------------------------------------------------
>
>                 Key: HDFS-3696
>                 URL: https://issues.apache.org/jira/browse/HDFS-3696
>             Project: Hadoop HDFS
>          Issue Type: Bug
>    Affects Versions: 2.0.0-alpha
>            Reporter: Kihwal Lee
>            Assignee: Tsz Wo (Nicholas), SZE
>            Priority: Critical
>             Fix For: 0.23.3
>
>         Attachments: h3696_20120724.patch, h3696_20120724_0.23.patch, h3696_20120724_b-1.patch
>
>
> When doing "fs -put" to a WebHdfsFileSystem (webhdfs://), the FsShell goes OOM if the
file size is large. When I tested, 20MB files were fine, but 200MB didn't work.  
> I also tried reading a large file by issuing "-cat" and piping to a slow sink in order
to force buffering. The read path didn't have this problem. The memory consumption stayed
the same regardless of progress.

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