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Posted to dev@jackrabbit.apache.org by "Thomas Mueller (JIRA)" <ji...@apache.org> on 2009/02/16 17:45:00 UTC
[jira] Resolved: (JCR-1605) RepositoryLock does not work on NFS
sometimes
[ https://issues.apache.org/jira/browse/JCR-1605?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Thomas Mueller resolved JCR-1605.
---------------------------------
Resolution: Fixed
Fix Version/s: 1.6.0
Committed in revision 744956 (including the new repository-1.6.dtd)
> 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
> Fix For: 1.6.0
>
> Attachments: repositoryLockMechanism.patch
>
>
> 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.
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