[jbosscache-issues] [JBoss JIRA] Resolved: (JBCACHE-1544) Optimistic locking and eviction

Optimistic locking and eviction ------------------------------- Key: JBCACHE-1544 URL: https://jira.jboss.org/jira/browse/JBCACHE-1544 Project: JBoss Cache Issue Type: Bug Security Level: Public(Everyone can see) Affects Versions: 1.4.1.SP13 Reporter: Mircea Markus Assignee: Galder Zamarreno Attachments: cluster-evictor.tar.gz, jboss-cache-jdk50.jar, optimistic-replicated-eviction.xml, OptimisticReplicatedEvictionTest.java, patch-v1.txt Since eviction is done per node, it is easy to get the cache into a bad state. For example, a 2-node cluster, OPTIMISTIC, REPL_SYNC, 60 second eviction: On Node A: cache.put ( "/foo", 0, 0 ); // this could be from any node for ( ;; ) { Thread.sleep ( 30000 ); // wait 30 seconds cache.get ( "/foo", 0 ); // refresh the eviction timer so the node will never be evicted on A } --------- This is just using the default JBC versioning, and direct cache access. No hibernate. There's no special configuration for the cache except what I listed (OPTIMISTIC, REPL_SYNC, 60 second eviction). No code hitting the cache except what I listed below. By the way, this is EAP 4.3 CP05 (JBC 1.4.1.SP13). On Node B: // wait at least 60 seconds after the original put for the node to be evicted on B cache.put ( "/foo", 0, 0 ); // will always fail during replication to A: org.jboss.cache.optimistic.DataVersioningException: DataNode [/foo] version Ver=2 is newer than workspace node Ver=1