Re: [rules-users] Problem with JPA session persistence in Drools Flow (5.0.1)

Looks like I am running into the same/similar issue while recreating from a session_id. Exception pasted below. Any idea whether it will be addressed in the coming release ? Thanks in advance.. /*--------------------------------------------*/ Hibernate: select sessioninf0_.id as id0_0_, sessioninf0_.dirty as dirty0_0_, sessioninf0_.lastModificationDate as lastModi3_0_0_, sessioninf0_.rulesByteArray as rulesByt4_0_0_, sessioninf0_.startDate as startDate0_0_ from SessionInfo sessioninf0_ where sessioninf0_.id=? java.lang.RuntimeException: Unable to load session snapshot at

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/*--------------------------------------------*/ Mauricio Salatino wrote: > > Ok, I will try to take a look at it.. this week.. > I will let you know if I can fix it > > 2009/7/28 DroolsUser <rafiuddin.mk(a)gmail.com&gt;: >> Mark / salaboy, I am also facing same problem while recreate the session >> from database. Can you advice any alternative, so that I can go forward >> till >> the next release. Moreover when is the new release is ....... Do new >> release >> will targeting this kind problem? Please suggest any alternative to >> recreate >> the session from db. Thanks in advance...... >> >> gairey wrote: >> Mark, Done: https://jira.jboss.org/jira/browse/JBRULES-2199 - thanks for >> the >> quick response. Regards, Alan Mark Proctor Sent by: >> rules-users-bounces(a)lists.jboss.org 08/07/2009 13:49 Please respond to >> Rules >> Users List To Rules Users List cc Subject Re: [rules-users] Problem with >> JPA >> session persistence in Drools Flow (5.0.1) Can you open a JIRA for this, >> and >> we'll make sure it's done in the next few weeks: >> https://jira.jboss.org/jira/browse/JBRULES thanks Mark >> Alan.Gairey(a)tessella.com wrote: I'm currently using Drools Flow with JPA >> session persistence enabled as described in section 5.1 of the User >> Guide. >> As a process executes, session information is saved to the H2 database >> correctly. The problem comes if a process only executes part way through, >> and I then try to finish the process by recreating a session using the >> code: >> // recreate the session from database using the sessionId ksession = >> JPAKnowledgeService.loadStatefulKnowledgeSession( sessionId, kbase, null, >> env ); This gives me a NullPointerException. Having looked into the >> Drools >> Flow source code, I think the problem is in the class >>

>> The 4th constructor of this class is called as part of the loading of a >> knowledge session from the H2 database; this in turn leads to the >> afterCompletion method of the inner class SynchronizationImpl being >> called. >> The final two lines of this method are: ((JPAProcessInstanceManager) >> ((ReteooWorkingMemory) >> session).getProcessInstanceManager()).clearProcessInstances(); >> ((JPAWorkItemManager) ((ReteooWorkingMemory) >> session).getWorkItemManager()).clearWorkItems(); However, when called via >> the route described above, the session member variable of >> SingleSessionCommandService has not been set, thus causing the >> NullPointerException. (Interestingly, running the unit tests for >> drools-persistence-jpa does result in the NullPointerException being >> thrown >> multiple times, although the tests are still listed as having passed.) I >> believe enclosing the above two lines as follows will fix the problem: if >> (session != null) { ((JPAProcessInstanceManager) ((ReteooWorkingMemory) >> session).getProcessInstanceManager()).clearProcessInstances(); >> ((JPAWorkItemManager) ((ReteooWorkingMemory) >> session).getWorkItemManager()).clearWorkItems(); } Also, in the 4th >> constructor of SingleSessionCommandService, after the session has been >> set, >> the following line needs to be added to ensure the session id is the same >> as >> the session info id: ((ReteooStatefulSession) this.session).setId( >> this.sessionInfo.getId() ); (This line is present at the end of the 3rd >> constructor.) It would be great if this fix could make it into the Drools >> 5.1 release. Thanks. _______________________________________________ >> rules-users mailing list rules-users(a)lists.jboss.org >> https://lists.jboss.org/mailman/listinfo/rules-users >> _______________________________________________ rules-users mailing list >> rules-users(a)lists.jboss.org >> https://lists.jboss.org/mailman/listinfo/rules-users >> _______________________________________________ rules-users mailing list >> rules-users(a)lists.jboss.org >> https://lists.jboss.org/mailman/listinfo/rules-users >> >> ________________________________ >> View this message in context: Re: Problem with JPA session persistence in >> Drools Flow (5.0.1) >> Sent from the drools - user mailing list archive at Nabble.com. >> >> _______________________________________________ >> rules-users mailing list >> rules-users(a)lists.jboss.org >> https://lists.jboss.org/mailman/listinfo/rules-users >> >> > > > > -- > - http://salaboy.wordpress.com > - http://www.jbug.com.ar > - Salatino "Salaboy" Mauricio - > _______________________________________________ > rules-users mailing list > rules-users(a)lists.jboss.org > https://lists.jboss.org/mailman/listinfo/rules-users > > -- View this message in context:

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