[jira] Issue Comment Edited: (JCR-2396) File Journal workaround for misbehaving NFS implementations

["Thomas Mueller (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/JCR-2396?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12778787#action_12778787 ] 

Thomas Mueller edited comment on JCR-2396 at 11/17/09 9:28 AM:
---------------------------------------------------------------

This patch used FileChannel.lock(..) as a workaround.
The patch is against Jackrabbit 1.4.10.

      was (Author: tmueller):
    This patch used FileChannel.lock(..) as a workaround.

  
> File Journal workaround for misbehaving NFS implementations
> -----------------------------------------------------------
>
>                 Key: JCR-2396
>                 URL: https://issues.apache.org/jira/browse/JCR-2396
>             Project: Jackrabbit Content Repository
>          Issue Type: Improvement
>          Components: clustering
>    Affects Versions: core 1.4.10
>         Environment: Some versions of NFS
>            Reporter: Thomas Mueller
>            Assignee: Thomas Mueller
>            Priority: Minor
>         Attachments: diff.patch
>
>
> After one NFS client wrote data to a file, reading from another client results in blocks of zero
> in some NFS implementations. This is a known issue:
> http://markmail.org/search/blocks+of+zeros+%28NULLs%29+in+NFS+files+in+kernels
> The Jackrabbit file journal implementation does not work properly in this situation.

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