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

Thanks Kris Will download from the below link and check. Quick question, do you know when the official 5.1 release will be available ? Kris Verlaenen wrote: > > The fix for this issue has been added to trunk about a month ago already > I think, have you already tried with the 5.1.0 SNAPSHOT release? Does > this solve your issue? > > You can get the snapshot at > https://hudson.jboss.org/hudson/job/drools/lastSuccessfulBuild/artifact/ > > Kris > > Quoting SBalakrishnan <Sanjay.Balakrishnan(a)fnis.com&gt;: > >> >> 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: >> >

>> 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 >> > > > > > Disclaimer: http://www.kuleuven.be/cwis/email_disclaimer.htm > _______________________________________________ > rules-users mailing list > rules-users(a)lists.jboss.org > https://lists.jboss.org/mailman/listinfo/rules-users > > -- View this message in context:

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