Hi everybody! I'm using Drools 5.4.0.Final.
I'm checking changes in knowledge repository and if there is any - update knowledge base. The changes listening I perform like described in article: https://community.jboss.org/wiki/PublishDroolsArtifactsFromAProductionEnvironment. Updating knowledge base code: private static final Environment JBPM_ENVIRONMENT = KnowledgeBaseFactory.newEnvironment(); private static final KnowledgeSessionConfiguration JBPM_CONFIG; static { JBPM_ENVIRONMENT.set(EnvironmentName.ENTITY_MANAGER_FACTORY, Persistence.createEntityManagerFactory("org.jbpm.persistence.jpa")); JBPM_ENVIRONMENT.set(EnvironmentName.TRANSACTION_MANAGER, TransactionManagerServices.getTransactionManager()); JBPM_ENVIRONMENT.set(EnvironmentName.GLOBALS, new MapGlobalResolver()); Properties properties = new Properties(); properties.put("drools.processInstanceManagerFactory", "org.jbpm.persistence.processinstance.JPAProcessInstanceManagerFactory"); properties.put("drools.processSignalManagerFactory", "org.jbpm.persistence.processinstance.JPASignalManagerFactory"); JBPM_CONFIG = KnowledgeBaseFactory.newKnowledgeSessionConfiguration(properties); } .... private static StatefulKnowledgeSession createSession() { StatefulKnowledgeSession session = JPAKnowledgeService.newStatefulKnowledgeSession(readKnowledgeBase(), JBPM_CONFIG, JBPM_ENVIRONMENT); session.getWorkItemManager().registerWorkItemHandler("Human Task", new CommandBasedWSHumanTaskHandler(session)); return session; } When I load changes from main thread (on startup, for example) everything is fine, but when I try to reload knowledge base from another thread it falls with exception ( full stacktrace <http://drools.46999.n3.nabble.com/file/n4020008/error_log.txt> ): 15:00:56,420 ERROR [org.drools.persistence.SingleSessionCommandService] (Timer-14) Could not commit session: java.lang.NullPointerException at org.drools.persistence.jta.JtaTransactionManager.getStatus(JtaTransactionManager.java:205) [drools-persistence-jpa-5.4.0.Final.jar:5.4.0.Final] How can I solve it? Thank you for your attention. Have a good day! -- View this message in context: http://drools.46999.n3.nabble.com/Reloading-knowledge-base-from-another-thread-tp4020008.html Sent from the Drools: User forum mailing list archive at Nabble.com. _______________________________________________ rules-users mailing list [email protected] https://lists.jboss.org/mailman/listinfo/rules-users
