Has anyone successfully used JPAVariablePersister on Sql Server? The quick hits are we are running MSSQL 2008, and after introducing JPAVariablePersister (which is described very well in http://blog.athico.com/2009/09/drools-flow-variable-persistence.html) every time I run my test case, the DB becomes non-responsive, returning from any JDBC pings: java.sql.SQLException: I/O Error: DB server closed connection. You can't even connect through MSSQL Management Studios, looks like RPC service has gone down. Haven't been able to do much troubleshooting yet (slow going when you need to get a DBA to reboot your sever every time.) I've already tested out the JPAKnowledgeService with some success. Setting up my session with the following code, I can see the SessionInfo, ProcessInstanceInfo, ProcessInstanceInfo_eventTypes tables storing data, looks pretty solid, and I can grab the processes again. EntityManagerFactory emf = Persistence.createEntityManagerFactory("org.drools.persistence.jpa"); env = KnowledgeBaseFactory.newEnvironment(); env.set(EnvironmentName.ENTITY_MANAGER_FACTORY, emf); session = JPAKnowledgeService.newStatefulKnowledgeSession(knowledgeBase, null, env); Map<String, Object> parameterMap = new HashMap<String, Object>(); parameterMap.put("claim", claim); processInstance = session.startProcess(CLAIMS_DEMO, parameterMap); I want to store my variable separately though, as we already have them as Hibernate DTOs. So I added the following code, as well as adding JPAVariablePersister to my persistence.xml. VariablePersistenceStrategyFactory.getVariablePersistenceStrategy() .setPersister("javax.persistence.Entity", "org.drools.persistence.processinstance.persisters.JPAVariablePersister"); The code appears to run through. This time, I can see data in the SessionInfo, ProcessInstanceInfo, ProcessInstanceInfo_eventTypes tables, as well as additional data in VariableInstanceInfo, and my two entities (Claim, which has a List of Role.) The data looks pretty good, and my process logs hit the expected nodes. Anyway, I'll post more as I learn it. Let me know if anyone else is running into this. Thanks! Bill _______________________________________________ rules-users mailing list rules-users(a)lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users

Hi Mauricio, I don't actually have a stack trace. Every time I've run the test, it has completed without errors exactly once. There is nothing in the stack indicating anything bad happened, but immediately after SQL Server is unresponsive to any clients. As to Hibernate Mappings, you are ahead of me already. I am currently testing with annotated JPA entities (for Claims and Role) which mirror my real Hibernate mapped entities. I've haven't found anything absolute on this, but think you CAN'T use Hibernate mappings within JPA. That means we will need a new Variable Persister, but presumably one similar to the JPA Persister. I'll be testing more today, as I'll can and let you know if my DBA can get any more info to see if SQL Server is telling us anything useful. Thanks! And great work on the variable persister, the timing was perfect for us! Bill ------------------------------ *From:* Mauricio Salatino <salaboy(a)gmail.com&gt; *To:* Rules Users List <rules-users(a)lists.jboss.org&gt; *Sent:* Fri, October 16, 2009 4:41:46 AM *Subject:* Re: [rules-users] [droolsflow] JPAVariablePersister Crashing SQL Server RPC? HI Bill, Can you paste here the full stack trace? I don't test it in SQL Server, but if the problem persist I'm interested in solve it. Some thoughts: 1) does JPA take the Hibernate Mappings as JPA entities without adding them at the persistence.xml file?, I think yes, but I'm not sure 2) if not, probably we need to create a new persister for hibernate mapped entities. On Thu, Oct 15, 2009 at 9:26 PM, Bill Tarr <javatestcase(a)yahoo.com&gt; wrote: > Has anyone successfully used JPAVariablePersister on Sql Server? The > quick hits are we are running MSSQL 2008, and after introducing > JPAVariablePersister (which is described very well in > http://blog.athico.com/2009/09/drools-flow-variable-persistence.html) > every time I run my test case, the DB becomes non-responsive, returning from > any JDBC pings: > > java.sql.SQLException: I/O Error: DB server closed connection. > > You can't even connect through MSSQL Management Studios, looks like RPC > service has gone down. Haven't been able to do much troubleshooting yet > (slow going when you need to get a DBA to reboot your sever every time.) > > I've already tested out the JPAKnowledgeService with some success. > Setting up my session with the following code, I can see the SessionInfo, > ProcessInstanceInfo, ProcessInstanceInfo_eventTypes tables storing data, > looks pretty solid, and I can grab the processes again. > > EntityManagerFactory emf = > Persistence.createEntityManagerFactory("org.drools.persistence.jpa"); > env = KnowledgeBaseFactory.newEnvironment(); > env.set(EnvironmentName.ENTITY_MANAGER_FACTORY, emf); > session = > JPAKnowledgeService.newStatefulKnowledgeSession(knowledgeBase, null, env); > > Map<String, Object> parameterMap = new HashMap<String, Object>(); > parameterMap.put("claim", claim); > processInstance = session.startProcess(CLAIMS_DEMO, parameterMap); > > I want to store my variable separately though, as we already have them as > Hibernate DTOs. So I added the following code, as well as adding > JPAVariablePersister to my persistence.xml. > > VariablePersistenceStrategyFactory.getVariablePersistenceStrategy() > .setPersister("javax.persistence.Entity", > > "org.drools.persistence.processinstance.persisters.JPAVariablePersister"); > > The code appears to run through. This time, I can see data in the > SessionInfo, ProcessInstanceInfo, ProcessInstanceInfo_eventTypes tables, as > well as additional data in VariableInstanceInfo, and my two entities (Claim, > which has a List of Role.) The data looks pretty good, and my process logs > hit the expected nodes. > > Anyway, I'll post more as I learn it. Let me know if anyone else is > running into this. > > Thanks! > > Bill > > > > > _______________________________________________ > 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

Quick update. No definitive progress, but some potential info that may lift the blame from JPA Persister. I installed SQL 2008 Express locally, and my test case does not crash my DB there. In addition, our DBA is seeing wierd behavior on our SQL Server since a .NET update was pushed down. We rolled back the update, and will test against the same server with debugging on Monday. I'll be looking into Hibernate vs JPA Persistence this weekend. Thanks! ------------------------------ *From:* Mauricio Salatino <salaboy(a)gmail.com&gt; *To:* Rules Users List <rules-users(a)lists.jboss.org&gt; *Sent:* Fri, October 16, 2009 8:51:45 AM *Subject:* Re: [rules-users] [droolsflow] JPAVariablePersister Crashing SQL Server RPC? Great to hear that you are using it. Obviously need some improvements. I will try to help you guys on that. Would be nice to activate the debugging option of MS SqlServer to see the queries that are being generated. If you have that information please let me know. Greetings. 2009/10/16 Bill Tarr <javatestcase(a)yahoo.com&gt; > Hi Mauricio, > > I don't actually have a stack trace. Every time I've run the test, it has > completed without errors exactly once. > > There is nothing in the stack indicating anything bad happened, but > immediately after SQL Server is unresponsive to any clients. > As to Hibernate Mappings, you are ahead of me already. > > I am currently testing with annotated JPA entities (for Claims and Role) > which mirror my real Hibernate mapped entities. > > I've haven't found anything absolute on this, but think you CAN'T use > Hibernate mappings within JPA. > > That means we will need a new Variable Persister, but presumably one > similar to the JPA Persister. > > I'll be testing more today, as I'll can and let you know if my DBA can get > any more info to see if SQL Server is telling us anything useful. > > Thanks! And great work on the variable persister, the timing was perfect > for us! > > Bill > _______________________________________________ rules-users mailing list rules-users(a)lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users

I am back on the same dev server today, no issues now. I am using JTDS 1.2.2, which I agree is generally better than the MS version. Our DBA thinks the .NET update (or something else) reset the number of allowed connections from 32,676 to 5. That could be it. Anyway, unless we can recreate, its a dead issue. Anyway, I've got some other issues with JPAVariablePersister, so I'm going to start another thread, hopefully you can help me again :-) ------------------------------ *From:* Mauricio Salatino <salaboy(a)gmail.com&gt; *To:* Rules Users List <rules-users(a)lists.jboss.org&gt; *Sent:* Sat, October 17, 2009 7:06:46 AM *Subject:* Re: [rules-users] [droolsflow] JPAVariablePersister Crashing SQL Server RPC? Hmm... Interesting.. what JDBC driver are you using? I remember having troubles with the microsoft one, then I tried with JTDS and everything works fine. But this was about a year ago, with other problem. 2009/10/17 Bill Tarr <javatestcase(a)yahoo.com&gt; > Quick update. No definitive progress, but some potential info that may > lift the blame from JPA Persister. > > I installed SQL 2008 Express locally, and my test case does not crash my > DB there. > > In addition, our DBA is seeing wierd behavior on our SQL Server since a > .NET update was pushed down. > > We rolled back the update, and will test against the same server with > debugging on Monday. > I'll be looking into Hibernate vs JPA Persistence this weekend. > > Thanks! > > ------------------------------ > *From:* Mauricio Salatino <salaboy(a)gmail.com&gt; > *To:* Rules Users List <rules-users(a)lists.jboss.org&gt; > *Sent:* Fri, October 16, 2009 8:51:45 AM > *Subject:* Re: [rules-users] [droolsflow] JPAVariablePersister Crashing > SQL Server RPC? > > Great to hear that you are using it. > Obviously need some improvements. I will try to help you guys on that. > Would be nice to activate the debugging option of MS SqlServer to see the > queries that are being generated. If you have that information please let me > know. > Greetings. > > 2009/10/16 Bill Tarr <javatestcase(a)yahoo.com&gt; > >> Hi Mauricio, >> >> I don't actually have a stack trace. Every time I've run the test, it has >> completed without errors exactly once. >> >> There is nothing in the stack indicating anything bad happened, but >> immediately after SQL Server is unresponsive to any clients. >> As to Hibernate Mappings, you are ahead of me already. >> >> I am currently testing with annotated JPA entities (for Claims and Role) >> which mirror my real Hibernate mapped entities. >> >> I've haven't found anything absolute on this, but think you CAN'T use >> Hibernate mappings within JPA. >> >> That means we will need a new Variable Persister, but presumably one >> similar to the JPA Persister. >> >> I'll be testing more today, as I'll can and let you know if my DBA can >> get any more info to see if SQL Server is telling us anything useful. >> >> Thanks! And great work on the variable persister, the timing was perfect >> for us! >> >> Bill >> > > > _______________________________________________ > 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