NPE in Total Order when tries to unblock blocked PrepareCommand twice (or more) -------------------------------------------------------------------------------- Key: ISPN-3004 URL: https://issues.jboss.org/browse/ISPN-3004 Project: Infinispan Issue Type: Bug Components: Transactions Affects Versions: 5.3.0.Alpha1 Reporter: Pedro Ruivo Assignee: Pedro Ruivo Fix For: 5.3.0.Final When the prepares fails, it unblocks waiting prepares immediately. However, when a rollback arrives, it tries to unblock them again, throwing a NPE. fix in TotalOrderManager: {code} if (synchronizedBlock == null) { //already released! return; } {code}