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 drools-persistence-jpa\src\main\java\org\drools\persistence\session\SingleSessionCommandService.java. 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

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

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 >> >

>> at >> >

>> at >> >

>> at >> >

>> at >> >

>> at >> >

>> at >> >

>> at >> >

>> at >> >

>> at >> >

>> at >> >

>> at >> >

>> at >> >

>> /*--------------------------------------------*/ >> >> >> 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

Kris, Did download the artifacts (drools-5.1.0.SNAPSHOT-bin.zip) from the above location but ran into the same issue reported earlier. /*------------------------------------------------------------------*/ java.lang.RuntimeException: Unable to load session snapshot at org.drools.persistence.session.JPASessionMarshallingHelper.loadSnapshot(JPASessionMarshallingHelper.java:112) at org.drools.persistence.session.JPASessionMarshallingHelper.<init>(JPASessionMarshallingHelper.java:46) at org.drools.persistence.session.SingleSessionCommandService.<init>(SingleSessionCommandService.java:194) at org.drools.persistence.jpa.impl.JPAKnowledgeServiceProviderImpl.loadStatefulKnowledgeSession(JPAKnowledgeServiceProviderImpl.java:75) at org.drools.persistence.jpa.JPAKnowledgeService.loadStatefulKnowledgeSession(JPAKnowledgeService.java:102) at org.drools.examples.process.order.OrderExample.createWorkingMemory(OrderExample.java:279) at org.drools.examples.process.order.OrderExample.<init>(OrderExample.java:107) at org.drools.examples.process.order.OrderExample.main(OrderExample.java:88) Caused by: java.lang.NullPointerException at org.drools.marshalling.impl.InputMarshaller.readLeftTuple(InputMarshaller.java:496) at org.drools.marshalling.impl.InputMarshaller.readLeftTuples(InputMarshaller.java:426) at org.drools.marshalling.impl.InputMarshaller.readFactHandles(InputMarshaller.java:349) at org.drools.marshalling.impl.InputMarshaller.readSession(InputMarshaller.java:207) at org.drools.marshalling.impl.DefaultMarshaller.unmarshall(DefaultMarshaller.java:75) at org.drools.persistence.session.JPASessionMarshallingHelper.loadSnapshot(JPASessionMarshallingHelper.java:104) /*------------------------------------------------------------------*/ I am creating a JPA session and starting a process with a human task and then stopping the engine without completing the human task .Then trying to load from the earlier session. Am I missing any calls before exit. Appreciate your help,thanks in advance Sanjay Kris Verlaenen wrote: > > We're planning to do a M1 near the end of the month, and a final a few > weeks later. > > Kris > > Quoting SBalakrishnan <Sanjay.Balakrishnan(a)fnis.com&gt;: > >> >> 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 >> >> >> > >> > org.drools.persistence.session.JPASessionMarshallingHelper.loadSnapshot(JPASessionMarshallingHelper.java:112) >> >> at >> >> >> > >> > org.drools.persistence.session.JPASessionMarshallingHelper.<init>(JPASessionMarshallingHelper.java:46) >> >> at >> >> >> > >> > org.drools.persistence.session.SingleSessionCommandService.<init>(SingleSessionCommandService.java:171) >> >> at >> >> >> > >> > org.drools.persistence.jpa.impl.JPAKnowledgeServiceProviderImpl.loadStatefulKnowledgeSession(JPAKnowledgeServiceProviderImpl.java:75) >> >> at >> >> >> > >> > org.drools.persistence.jpa.JPAKnowledgeService.loadStatefulKnowledgeSession(JPAKnowledgeService.java:102) >> >> at >> >> >> > >> > org.drools.examples.process.order.OrderExample.createWorkingMemory(OrderExample.java:257) >> >> at >> >> >> > >> > org.drools.examples.process.order.OrderExample.<init>(OrderExample.java:99) >> >> at >> >> >> org.drools.examples.process.order.OrderExample.main(OrderExample.java:80) >> >> Caused by: java.lang.NullPointerException >> >> at >> >> >> > >> > org.drools.marshalling.impl.InputMarshaller.readLeftTuple(InputMarshaller.java:496) >> >> at >> >> >> > >> > org.drools.marshalling.impl.InputMarshaller.readLeftTuples(InputMarshaller.java:426) >> >> at >> >> >> > >> > org.drools.marshalling.impl.InputMarshaller.readFactHandles(InputMarshaller.java:349) >> >> at >> >> >> > >> > org.drools.marshalling.impl.InputMarshaller.readSession(InputMarshaller.java:207) >> >> at >> >> >> > >> > org.drools.marshalling.impl.DefaultMarshaller.unmarshall(DefaultMarshaller.java:75) >> >> at >> >> >> > >> > org.drools.persistence.session.JPASessionMarshallingHelper.loadSnapshot(JPASessionMarshallingHelper.java:104) >> >> /*--------------------------------------------*/ >> >> >> >> >> >> 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 >> >> >> >> >> >> > >> > drools-persistence-jpa\src\main\java\org\drools\persistence\session\SingleSessionCommandService.java. >> >> >> 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: >> >> >> > >> > http://www.nabble.com/Problem-with-JPA-session-persistence-in-Drools-Flow... >> >> 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: >> > http://www.nabble.com/Problem-with-JPA-session-persistence-in-Drools-Flow... >> 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 > >

That NPE seems to be an error in the marshaling of the session. Do you have a simple test case that you can send me so we can use that to reproduce this issue (I noticed you are extending the order example, but you seem to have introduced a few new classes and probably some rules as well)? Regarding the session marshaling, it persists its entire internal state. So that includes all running process instances, all data in the working memory (although that is configurable through a strategy) and the internal state (agenda etc.). This does not include the knowledge base or external components, like for example work item handlers. The current human task handler implementation does indeed not support restoring after failure, as the event listeners are not re-registered. A more fail-safe implementation, for example registering the necessary listeners upon initialization or using a fail-safe protocol like JMS should be used for that. If I remember correctly, a community member is already looking into that. Kris Quoting SBalakrishnan <Sanjay.Balakrishnan(a)fnis.com&gt;: > > Hi, > > > Looks like this issue and related problems > have become a show stopper for us. > > > > The UseCase we are trying to address is recreating inflight Human > Tasks > after the engine has been stopped (could be a shutdown or server > error scenario). > > It was noticed that if we do not insert any global variables in the > session > ,then we do not see the earlier reported Null pointer exception and > the > session load from > the previous session id goes through. > (Code snippet below) > > > But then I come to the next question, what type of information does > the > session > carry over (could not find information on it) . Is it only global > variables > ? > > > Also what happens to the informaton tied to the registered handlers. > In this case all the task event registrations in the human task > handler(CommandBasedWSHumanTaskHandler) > are lost.As a result it is noticed that it leads to tasks getting > completed > on the > MinaTaskServer, but the Process Flow not knowing about it and leading > to > workItems > remaining open (orphan items). > > Please do let us know if you have run into this issue or if you have > other inputs. > > > Thanks in advance > Sanjay > > /*Commented code to bypass first issue:-*/ > > Order order = new Order(); > order.setOrderId("Order-" + ++orderCounter); > order.setCustomerId(customerIdTextField.getText()); > ItemInfo itemInfo = (ItemInfo) itemComboBox.getSelectedItem(); > order.addOrderItem(itemInfo.getItemId(), new > Integer(amountTextField.getText()), itemInfo.getPrice()); > > AppData testAppData = new AppData(); > testAppData.setRelationShipPricing("Pricing"); > > //Commented global variable insert > //Commented ksession.insert(testAppData); > > Map<String, Object> parameters = new HashMap<String, Object>(); > parameters.put("order", order); > parameters.put("email", emailTextField.getText()); > WorkflowProcessInstance testProcess = (WorkflowProcessInstance) > ksession.startProcess("RuleSetExample", parameters); > ksession.fireAllRules(); > this._processId= testProcess.getId(); > > /*Commented code to bypass first issue:-*/ > > > SBalakrishnan wrote: > > > > Kris, > > > > Did download the artifacts (drools-5.1.0.SNAPSHOT-bin.zip) > > from the above location but ran into the same issue reported > earlier. > > > > > /*------------------------------------------------------------------*/ > > > > java.lang.RuntimeException: Unable to load session snapshot > > at > > > org.drools.persistence.session.JPASessionMarshallingHelper.loadSnapshot(JPASessionMarshallingHelper.java:112) > > at > > > org.drools.persistence.session.JPASessionMarshallingHelper.<init>(JPASessionMarshallingHelper.java:46) > > at > > > org.drools.persistence.session.SingleSessionCommandService.<init>(SingleSessionCommandService.java:194) > > at > > > org.drools.persistence.jpa.impl.JPAKnowledgeServiceProviderImpl.loadStatefulKnowledgeSession(JPAKnowledgeServiceProviderImpl.java:75) > > at > > > org.drools.persistence.jpa.JPAKnowledgeService.loadStatefulKnowledgeSession(JPAKnowledgeService.java:102) > > at > > > org.drools.examples.process.order.OrderExample.createWorkingMemory(OrderExample.java:279) > > at > > > org.drools.examples.process.order.OrderExample.<init>(OrderExample.java:107) > > at > > > org.drools.examples.process.order.OrderExample.main(OrderExample.java:88) > > Caused by: java.lang.NullPointerException > > at > > > org.drools.marshalling.impl.InputMarshaller.readLeftTuple(InputMarshaller.java:496) > > at > > > org.drools.marshalling.impl.InputMarshaller.readLeftTuples(InputMarshaller.java:426) > > at > > > org.drools.marshalling.impl.InputMarshaller.readFactHandles(InputMarshaller.java:349) > > at > > > org.drools.marshalling.impl.InputMarshaller.readSession(InputMarshaller.java:207) > > at > > > org.drools.marshalling.impl.DefaultMarshaller.unmarshall(DefaultMarshaller.java:75) > > at > > > org.drools.persistence.session.JPASessionMarshallingHelper.loadSnapshot(JPASessionMarshallingHelper.java:104) > > > > > /*------------------------------------------------------------------*/ > > > > > > I am creating a JPA session and starting a process > > with a human task and then stopping the engine without completing > > the human task .Then trying to load from the earlier session. > > > > Am I missing any calls before exit. > > > > Appreciate your help,thanks in advance > > > > Sanjay > > > > > > Kris Verlaenen wrote: > >> > >> We're planning to do a M1 near the end of the month, and a final a > few > >> weeks later. > >> > >> Kris > >> > >> Quoting SBalakrishnan <Sanjay.Balakrishnan(a)fnis.com&gt;: > >> > >>> > >>> 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 > >>> >> > >>> > > >>> > >> > org.drools.persistence.session.JPASessionMarshallingHelper.loadSnapshot(JPASessionMarshallingHelper.java:112) > >>> >> at > >>> >> > >>> > > >>> > >> > org.drools.persistence.session.JPASessionMarshallingHelper.<init>(JPASessionMarshallingHelper.java:46) > >>> >> at > >>> >> > >>> > > >>> > >> > org.drools.persistence.session.SingleSessionCommandService.<init>(SingleSessionCommandService.java:171) > >>> >> at > >>> >> > >>> > > >>> > >> > org.drools.persistence.jpa.impl.JPAKnowledgeServiceProviderImpl.loadStatefulKnowledgeSession(JPAKnowledgeServiceProviderImpl.java:75) > >>> >> at > >>> >> > >>> > > >>> > >> > org.drools.persistence.jpa.JPAKnowledgeService.loadStatefulKnowledgeSession(JPAKnowledgeService.java:102) > >>> >> at > >>> >> > >>> > > >>> > >> > org.drools.examples.process.order.OrderExample.createWorkingMemory(OrderExample.java:257) > >>> >> at > >>> >> > >>> > > >>> > >> > org.drools.examples.process.order.OrderExample.<init>(OrderExample.java:99) > >>> >> at > >>> >> > >>> > org.drools.examples.process.order.OrderExample.main(OrderExample.java:80) > >>> >> Caused by: java.lang.NullPointerException > >>> >> at > >>> >> > >>> > > >>> > >> > org.drools.marshalling.impl.InputMarshaller.readLeftTuple(InputMarshaller.java:496) > >>> >> at > >>> >> > >>> > > >>> > >> > org.drools.marshalling.impl.InputMarshaller.readLeftTuples(InputMarshaller.java:426) > >>> >> at > >>> >> > >>> > > >>> > >> > org.drools.marshalling.impl.InputMarshaller.readFactHandles(InputMarshaller.java:349) > >>> >> at > >>> >> > >>> > > >>> > >> > org.drools.marshalling.impl.InputMarshaller.readSession(InputMarshaller.java:207) > >>> >> at > >>> >> > >>> > > >>> > >> > org.drools.marshalling.impl.DefaultMarshaller.unmarshall(DefaultMarshaller.java:75) > >>> >> at > >>> >> > >>> > > >>> > >> > org.drools.persistence.session.JPASessionMarshallingHelper.loadSnapshot(JPASessionMarshallingHelper.java:104) > >>> >> /*--------------------------------------------*/ > >>> >> > >>> >> > >>> >> 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 > >>> >> >> > >>> >> > >>> > > >>> > >> > drools-persistence-jpa\src\main\java\org\drools\persistence\session\SingleSessionCommandService.java. > >>> >> >> 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: > >>> >> > >>> > > >>> > >> > http://www.nabble.com/Problem-with-JPA-session-persistence-in-Drools-Flow... > >>> >> 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: > >>> > >> > http://www.nabble.com/Problem-with-JPA-session-persistence-in-Drools-Flow... > >>> 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: > http://www.nabble.com/Problem-with-JPA-session-persistence-in-Drools-Flow... > 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

Kris, Thanks again. Sorry my earlier test case was missing some items. Updated test case provided below. Thanks Sanjay /*----------Start Test Case ------------*/ Updated Test Case:- a) Run org.drools.examples.process.order.OrderExample.java b) Click on the create button (with default options). Note :- Look up the the session id from the database c) From the eclipse plugin complete one human task (Verify Order). d) Stop the Order example . e) Update the method createWorkingMemory() in org.drools.examples.process.order.OrderExample.java, to load the last session id in the invocation of JPAKnowledgeService.loadStatefulKnowledgeSession. f) Run order Order example . Note:-Should see exception from loadStatefulKnowledgeSession. Was getting this error in H2 and Oracle. /*----------End Test Case ------------*/ SBalakrishnan wrote: > > Thanks for the quick response Kris and appreciate your help. > > It would be great if we can get more information on the activity by the > community member for the fail safe approach for the handlers. > > > Yes, I am using a modified > org.drools.examples.process.order.OrderExample.java class. > Using a modified drl file RuleSetExample.rf (Only two human tasks). > I am attaching the sample project. > > Thanks > Sanjay > > > > Test Case:- > > a) Run org.drools.examples.process.order.OrderExample.java > b) Click on the create button (with default options). > > > The main methods being called are:- > a) private void createWorkingMemory() > > intial setup and load of session happens here. > > b)createOrder() > > ksession.insert(),ksession.startProcess > > > > Kris Verlaenen wrote: >> >> That NPE seems to be an error in the marshaling of the session. Do you >> have a simple test case that you can send me so we can use that to >> reproduce this issue (I noticed you are extending the order example, but >> you seem to have introduced a few new classes and probably some rules as >> well)? >> >> Regarding the session marshaling, it persists its entire internal state. >> So that includes all running process instances, all data in the working >> memory (although that is configurable through a strategy) and the >> internal state (agenda etc.). This does not include the knowledge base >> or external components, like for example work item handlers. >> >> The current human task handler implementation does indeed not support >> restoring after failure, as the event listeners are not re-registered. >> A more fail-safe implementation, for example registering the necessary >> listeners upon initialization or using a fail-safe protocol like JMS >> should be used for that. If I remember correctly, a community member is >> already looking into that. >> >> Kris >> >> Quoting SBalakrishnan <Sanjay.Balakrishnan(a)fnis.com&gt;: >> >>> >>> Hi, >>> >>> >>> Looks like this issue and related problems >>> have become a show stopper for us. >>> >>> >>> >>> The UseCase we are trying to address is recreating inflight Human >>> Tasks >>> after the engine has been stopped (could be a shutdown or server >>> error scenario). >>> >>> It was noticed that if we do not insert any global variables in the >>> session >>> ,then we do not see the earlier reported Null pointer exception and >>> the >>> session load from >>> the previous session id goes through. >>> (Code snippet below) >>> >>> >>> But then I come to the next question, what type of information does >>> the >>> session >>> carry over (could not find information on it) . Is it only global >>> variables >>> ? >>> >>> >>> Also what happens to the informaton tied to the registered handlers. >>> In this case all the task event registrations in the human task >>> handler(CommandBasedWSHumanTaskHandler) >>> are lost.As a result it is noticed that it leads to tasks getting >>> completed >>> on the >>> MinaTaskServer, but the Process Flow not knowing about it and leading >>> to >>> workItems >>> remaining open (orphan items). >>> >>> Please do let us know if you have run into this issue or if you have >>> other inputs. >>> >>> >>> Thanks in advance >>> Sanjay >>> >>> /*Commented code to bypass first issue:-*/ >>> >>> Order order = new Order(); >>> order.setOrderId("Order-" + ++orderCounter); >>> order.setCustomerId(customerIdTextField.getText()); >>> ItemInfo itemInfo = (ItemInfo) itemComboBox.getSelectedItem(); >>> order.addOrderItem(itemInfo.getItemId(), new >>> Integer(amountTextField.getText()), itemInfo.getPrice()); >>> >>> AppData testAppData = new AppData(); >>> testAppData.setRelationShipPricing("Pricing"); >>> >>> //Commented global variable insert >>> //Commented ksession.insert(testAppData); >>> >>> Map<String, Object> parameters = new HashMap<String, Object>(); >>> parameters.put("order", order); >>> parameters.put("email", emailTextField.getText()); >>> WorkflowProcessInstance testProcess = (WorkflowProcessInstance) >>> ksession.startProcess("RuleSetExample", parameters); >>> ksession.fireAllRules(); >>> this._processId= testProcess.getId(); >>> >>> /*Commented code to bypass first issue:-*/ >>> >>> >>> SBalakrishnan wrote: >>> > >>> > Kris, >>> > >>> > Did download the artifacts (drools-5.1.0.SNAPSHOT-bin.zip) >>> > from the above location but ran into the same issue reported >>> earlier. >>> > >>> > >>> /*------------------------------------------------------------------*/ >>> > >>> > java.lang.RuntimeException: Unable to load session snapshot >>> > at >>> > >>> >> org.drools.persistence.session.JPASessionMarshallingHelper.loadSnapshot(JPASessionMarshallingHelper.java:112) >>> > at >>> > >>> >> org.drools.persistence.session.JPASessionMarshallingHelper.<init>(JPASessionMarshallingHelper.java:46) >>> > at >>> > >>> >> org.drools.persistence.session.SingleSessionCommandService.<init>(SingleSessionCommandService.java:194) >>> > at >>> > >>> >> org.drools.persistence.jpa.impl.JPAKnowledgeServiceProviderImpl.loadStatefulKnowledgeSession(JPAKnowledgeServiceProviderImpl.java:75) >>> > at >>> > >>> >> org.drools.persistence.jpa.JPAKnowledgeService.loadStatefulKnowledgeSession(JPAKnowledgeService.java:102) >>> > at >>> > >>> >> org.drools.examples.process.order.OrderExample.createWorkingMemory(OrderExample.java:279) >>> > at >>> > >>> >> org.drools.examples.process.order.OrderExample.<init>(OrderExample.java:107) >>> > at >>> > >>> org.drools.examples.process.order.OrderExample.main(OrderExample.java:88) >>> > Caused by: java.lang.NullPointerException >>> > at >>> > >>> >> org.drools.marshalling.impl.InputMarshaller.readLeftTuple(InputMarshaller.java:496) >>> > at >>> > >>> >> org.drools.marshalling.impl.InputMarshaller.readLeftTuples(InputMarshaller.java:426) >>> > at >>> > >>> >> org.drools.marshalling.impl.InputMarshaller.readFactHandles(InputMarshaller.java:349) >>> > at >>> > >>> >> org.drools.marshalling.impl.InputMarshaller.readSession(InputMarshaller.java:207) >>> > at >>> > >>> >> org.drools.marshalling.impl.DefaultMarshaller.unmarshall(DefaultMarshaller.java:75) >>> > at >>> > >>> >> org.drools.persistence.session.JPASessionMarshallingHelper.loadSnapshot(JPASessionMarshallingHelper.java:104) >>> > >>> > >>> /*------------------------------------------------------------------*/ >>> > >>> > >>> > I am creating a JPA session and starting a process >>> > with a human task and then stopping the engine without completing >>> > the human task .Then trying to load from the earlier session. >>> > >>> > Am I missing any calls before exit. >>> > >>> > Appreciate your help,thanks in advance >>> > >>> > Sanjay >>> > >>> > >>> > Kris Verlaenen wrote: >>> >> >>> >> We're planning to do a M1 near the end of the month, and a final a >>> few >>> >> weeks later. >>> >> >>> >> Kris >>> >> >>> >> Quoting SBalakrishnan <Sanjay.Balakrishnan(a)fnis.com&gt;: >>> >> >>> >>> >>> >>> 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 >>> >>> >> >>> >>> > >>> >>> >>> >> >>> >> org.drools.persistence.session.JPASessionMarshallingHelper.loadSnapshot(JPASessionMarshallingHelper.java:112) >>> >>> >> at >>> >>> >> >>> >>> > >>> >>> >>> >> >>> >> org.drools.persistence.session.JPASessionMarshallingHelper.<init>(JPASessionMarshallingHelper.java:46) >>> >>> >> at >>> >>> >> >>> >>> > >>> >>> >>> >> >>> >> org.drools.persistence.session.SingleSessionCommandService.<init>(SingleSessionCommandService.java:171) >>> >>> >> at >>> >>> >> >>> >>> > >>> >>> >>> >> >>> >> org.drools.persistence.jpa.impl.JPAKnowledgeServiceProviderImpl.loadStatefulKnowledgeSession(JPAKnowledgeServiceProviderImpl.java:75) >>> >>> >> at >>> >>> >> >>> >>> > >>> >>> >>> >> >>> >> org.drools.persistence.jpa.JPAKnowledgeService.loadStatefulKnowledgeSession(JPAKnowledgeService.java:102) >>> >>> >> at >>> >>> >> >>> >>> > >>> >>> >>> >> >>> >> org.drools.examples.process.order.OrderExample.createWorkingMemory(OrderExample.java:257) >>> >>> >> at >>> >>> >> >>> >>> > >>> >>> >>> >> >>> >> org.drools.examples.process.order.OrderExample.<init>(OrderExample.java:99) >>> >>> >> at >>> >>> >> >>> >>> >>> org.drools.examples.process.order.OrderExample.main(OrderExample.java:80) >>> >>> >> Caused by: java.lang.NullPointerException >>> >>> >> at >>> >>> >> >>> >>> > >>> >>> >>> >> >>> >> org.drools.marshalling.impl.InputMarshaller.readLeftTuple(InputMarshaller.java:496) >>> >>> >> at >>> >>> >> >>> >>> > >>> >>> >>> >> >>> >> org.drools.marshalling.impl.InputMarshaller.readLeftTuples(InputMarshaller.java:426) >>> >>> >> at >>> >>> >> >>> >>> > >>> >>> >>> >> >>> >> org.drools.marshalling.impl.InputMarshaller.readFactHandles(InputMarshaller.java:349) >>> >>> >> at >>> >>> >> >>> >>> > >>> >>> >>> >> >>> >> org.drools.marshalling.impl.InputMarshaller.readSession(InputMarshaller.java:207) >>> >>> >> at >>> >>> >> >>> >>> > >>> >>> >>> >> >>> >> org.drools.marshalling.impl.DefaultMarshaller.unmarshall(DefaultMarshaller.java:75) >>> >>> >> at >>> >>> >> >>> >>> > >>> >>> >>> >> >>> >> org.drools.persistence.session.JPASessionMarshallingHelper.loadSnapshot(JPASessionMarshallingHelper.java:104) >>> >>> >> /*--------------------------------------------*/ >>> >>> >> >>> >>> >> >>> >>> >> 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 >>> >>> >> >> >>> >>> >> >>> >>> > >>> >>> >>> >> >>> >> drools-persistence-jpa\src\main\java\org\drools\persistence\session\SingleSessionCommandService.java. >>> >>> >> >> 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: >>> >>> >> >>> >>> > >>> >>> >>> >> >>> >> http://www.nabble.com/Problem-with-JPA-session-persistence-in-Drools-Flow... >>> >>> >> 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: >>> >>> >>> >> >>> >> http://www.nabble.com/Problem-with-JPA-session-persistence-in-Drools-Flow... >>> >>> 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: >>> >> http://www.nabble.com/Problem-with-JPA-session-persistence-in-Drools-Flow... >>> 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 >> >> > http://www.nabble.com/file/p25296442/SnapShotDroolsExample.zip > SnapShotDroolsExample.zip >