NullPointerException thrown on JPA synchronization.afterCompletion() clearProcessInstances() -------------------------------------------------------------------------------------------- Key: JBRULES-3140 URL: https://issues.jboss.org/browse/JBRULES-3140 Project: Drools Issue Type: Bug Security Level: Public (Everyone can see) Components: drools-core Affects Versions: 5.2.0.Final Reporter: Nick Bruno Assignee: Mark Proctor In org.drools.persistence.SingleSessionCommandService$SynchronizationImpl.afterCompletion(), the following generates a NullPointerException when no processes are implemented. {noformat}if ( ksession != null ) { ((InternalKnowledgeRuntime) ksession).getProcessRuntime().clearProcessInstances(); // NullPointerException ((JPAWorkItemManager) ksession.getWorkItemManager()).clearWorkItems(); } {noformat} The fix is to grab the InternalProcessRuntime to a local variable and test if it is null before calling clearProcessInstances(), as so: {noformat}InternalProcessRuntime ipr = ((InternalKnowledgeRuntime) ksession).getProcessRuntime(); if( ipr != null) { ipr.clearProcessInstances(); }{noformat} -- This message is automatically generated by JIRA. For more information on JIRA, see: http://www.atlassian.com/software/jira