[jboss-jira] [JBoss JIRA] Assigned: (JBCLUSTER-275) Handle MergeViews in AbstractClusterLockSupport variants

Handle MergeViews in AbstractClusterLockSupport variants -------------------------------------------------------- Key: JBCLUSTER-275 URL: https://issues.jboss.org/browse/JBCLUSTER-275 Project: JBoss Clustering Issue Type: Task Security Level: Public(Everyone can see) Components: HA-Server-API Reporter: Brian Stansberry org.jboss.ha.framework.server.lock.AbstractClusterLockSupport and/or its subclasses need to deal with cluster merges, i.e. AS instances in groups {A, B} and {C, D} discover each other and form a single group {A, B, C, D}. Following a merge, it's possible a node in each of the merged subgroups thinks it has the cluster wide lock. A simple approach that *may* work in all cases is to handle a merge by having each node abandon the cluster-wide lock, forcing the next attempt by a local caller to re-acquire the lock. Need to think through though whether that is the correct semantic in all cases. AbstractClusterLockSupport needs to implement HAExtendedMembershipListener instead of just HAMembershipListener; this will allow it to know whether a view change was due to a merge.