Locks are not released due to timeouts when cluster node is brought down

When a cluster node is brought down that has set a JCR lock, during the downtime of the cluster node the lock is not released due to timeouts. This is because Jackrabbit runs a lock timeout release background task that is based on a local registry of nodes that were locked by that cluster node, i.e. cluster nodes don't try to release timed out locks set by other cluster nodes.