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From "Constantine Peresypkin (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (HDFS-9164) hdfs-nfs connector fails on O_TRUNC
Date Tue, 27 Oct 2015 20:14:27 GMT

     [ https://issues.apache.org/jira/browse/HDFS-9164?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Constantine Peresypkin updated HDFS-9164:
-----------------------------------------
    Assignee: Constantine Peresypkin
      Status: Patch Available  (was: Open)

> hdfs-nfs connector fails on O_TRUNC
> -----------------------------------
>
>                 Key: HDFS-9164
>                 URL: https://issues.apache.org/jira/browse/HDFS-9164
>             Project: Hadoop HDFS
>          Issue Type: Bug
>          Components: HDFS
>            Reporter: Constantine Peresypkin
>            Assignee: Constantine Peresypkin
>         Attachments: HDFS-9164.1.patch
>
>
> Linux NFS client will issue `open(.. O_TRUNC); write()` when overwriting a file that's
in nfs client cache (to not evict the inode, probably). Which will spectacularly fail on hdfs-nfs
with I/O error.
> Example:
> $ cp /some/file /to/hdfs/mount/
> $ cp /some/file /to/hdfs/mount/
> I/O error
> The first write will pass if the file is not in cache, the second one will always fail.



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