[jira] Updated: (HDFS-861) fuse-dfs does not support O_RDWR

["Brian Bockelman (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/HDFS-861?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Brian Bockelman updated HDFS-861:
---------------------------------

    Attachment: HDFS-861.patch

This patch implements the proposed change.  O_RDWR will work in a few cases; fuse-dfs respond with an error when you try to do a forbidden operation (such as writing to an existing file) instead of when you open it in the wrong mode.

This is important for our community as it allows users to "rsync" from a remote system into HDFS; primarily, I am trying to get the patch and its licensing documented.

> fuse-dfs does not support O_RDWR
> --------------------------------
>
>                 Key: HDFS-861
>                 URL: https://issues.apache.org/jira/browse/HDFS-861
>             Project: Hadoop HDFS
>          Issue Type: Bug
>          Components: contrib/fuse-dfs
>            Reporter: Brian Bockelman
>            Priority: Minor
>         Attachments: HDFS-861.patch
>
>
> Some applications (for us, the big one is rsync) will open a file in read-write mode when it really only intends to read xor write (not both).  fuse-dfs should try to not fail until the application actually tries to write to a pre-existing file or read from a newly created file.

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