[jira] Commented: (JCR-1605) RepositoryLock does not work on NFS sometimes

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

    [ https://issues.apache.org/jira/browse/JCR-1605?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12672274#action_12672274 ] 

Thomas Mueller commented on JCR-1605:
-------------------------------------

Two weeks ago, we ran out of disk space on an NFS 4 system. After rebooting, we could not start the repository because NFS wrongly reported the .lock file is locked. We had to manually delete .lock file. 

> RepositoryLock does not work on NFS sometimes
> ---------------------------------------------
>
>                 Key: JCR-1605
>                 URL: https://issues.apache.org/jira/browse/JCR-1605
>             Project: Jackrabbit Content Repository
>          Issue Type: Bug
>          Components: jackrabbit-core
>            Reporter: Thomas Mueller
>            Assignee: Thomas Mueller
>            Priority: Minor
>
> The RepositoryLock mechanism currently used in Jackrabbit uses FileLock. This doesn't work on some NFS file system. It looks like only NFS version 4 and newer supports locking. Older implementations may throw a IOException "No locks available", which means the NFS does not support byte-range locking.
> I propose to add a second locking mechanism, and add a configuration option to use it. For example: <FileLocking class="acme" />. This second locking mechanism is a cooperative locking protocol that uses a background (watchdog) thread and only uses regular file operations.

-- 
This message is automatically generated by JIRA.
-
You can reply to this email to add a comment to the issue online.