RepositoryLock does not work on NFS sometimes
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Key: JCR-1605
URL: https://issues.apache.org/jira/browse/JCR-1605
Project: Jackrabbit
Issue Type: Bug
Reporter: Thomas Mueller
Assignee: Thomas Mueller
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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