[rules-users] Caused by: java.lang.NullPointerException at org.drools.persistence.jta.JtaTransactionManager.rollback(JtaTransactionManager.java:181)
Esteban Aliverti
esteban.aliverti at gmail.com
Wed Mar 2 15:09:00 EST 2011
For the records: I have created https://issues.jboss.org/browse/JBRULES-2913.
I will fix it as soon as Mark fixes the trunk ;)
Best Regards,
XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX
Esteban Aliverti
- Developer @ http://www.plugtree.com
- Blog @ http://ilesteban.wordpress.com
2011/3/1 odelyaholiday <odelyay at sintecmedia.com>
> Thanks!
>
> Can you elaborate the solution?
>
>
>
> *From:* Esteban [via Drools - Java Rules Engine] [mailto:[hidden email]<http://user/SendEmail.jtp?type=node&node=2602869&i=0>]
>
> *Sent:* Tuesday, March 01, 2011 2:37 PM
> *To:* Odelya Holiday
> *Subject:* Re: Caused by: java.lang.NullPointerException at
> org.drools.persistence.jta.JtaTransactionManager.rollback(JtaTransactionManager.java:181)
>
>
>
> Unfortunately there is a "bug" (it is not really a bug but an omission in
> the code) that hides the real exception going on. The piece of code giving
> you troubles is (SingleSessionCommandService.java lines 119 - 138):
>
>
>
> *try {*
>
> * this.txm.begin();*
>
> * *
>
> * //this.appScopedEntityManager.joinTransaction();*
>
> * registerRollbackSync();*
>
>
>
> * jpm.getApplicationScopedPersistenceContext().persist(
> this.sessionInfo );*
>
>
>
> * this.txm.commit();*
>
>
>
> * } catch ( Exception t1 ) {*
>
> * try {*
>
> * this.txm.rollback();*
>
> * } catch ( Throwable t2 ) {*
>
> * throw new RuntimeException( "Could not commit session or
> rollback",*
>
> * t2 );*
>
> * }*
>
> * throw new RuntimeException( "Could not commit session",*
>
> * t1 );*
>
> * }*
>
>
>
> As you can see, when there is a problem in the body of the try-catch,
> drools tries to rollback the session. If the rollback itself fails, you get
> the exception "Could not commit session or rollback", but the original
> exception (t1) is lost.
>
> We already fixed a similar issue in SingleSessionCommandService#execute()
> and created a rollbackTransaction() method that logs the first exception if
> the session rollback fails.
>
> So, the solution (not a solution but a hack to see what is really going
> on) is to use the same rollbackTransaction() method in the catch part. If
> you want to see the real exception, you will need to download
> drools-persistence-jpa sources from
> https://github.com/droolsjbpm/drools/tree/master/drools-persistence-jpa and
> debug through the lines I mentioned. Or you can wait us to patch the code ;)
>
> For the records, this is the bug previously reported:
> https://issues.jboss.org/browse/JBRULES-2656. I will create a new one and
> link them together.
>
>
>
> Best Regards,
>
> XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX
>
> Esteban Aliverti
> - Developer @ http://www.plugtree.com
> - Blog @ http://ilesteban.wordpress.com
>
> On Tue, Mar 1, 2011 at 7:53 AM, odelyaholiday <[hidden email]<http://user/SendEmail.jtp?type=node&node=2602731&i=0&by-user=t>>
> wrote:
>
> Hi!
>
> I am working already for 3 days, trying to configure bitronix with spring
> and drools.
>
> I defined
>
> 1. persistence unit:
>
> <persistence-unit name="org.drools.persistence.jpa" transaction-type="JTA">
> <provider>org.hibernate.ejb.HibernatePersistence</provider>
> <jta-data-source>jdbc/DS1</jta-data-source>
> <class>org.drools.persistence.info.SessionInfo</class>
>
> <class>org.jbpm.persistence.processinstance.ProcessInstanceInfo</class>
> <class>org.drools.persistence.info.WorkItemInfo</class>
> <exclude-unlisted-classes>true</exclude-unlisted-classes>
> <properties>
> <property name="hibernate.dialect"
> value="org.hibernate.dialect.Oracle10gDialect" />
> <property name="hibernate.connection.autocommit"
> value="false" />
> <property name="hibernate.max_fetch_depth" value="3"
> />
> <property name="hibernate.show_sql" value="true" />
> <property
> name="hibernate.current_session_context_class" value="jta" />
> <property name="hibernate.connection.driver_class"
> value="oracle.jdbc.xa.client.OracleXADataSource" />
> <property name="hibernate.jndi.class"
> value="bitronix.tm.jndi.BitronixInitialContextFactory"/>
> <property
> name="hibernate.transaction.manager_lookup_class"
> value="org.hibernate.transaction.BTMTransactionManagerLookup" />
> </properties>
> </persistence-unit>
>
> 2. in my application context:
> <!-- Bitronix Transaction Manager embedded configuration -->
> <bean id="oracleDataSource"
> class="bitronix.tm.resource.jdbc.PoolingDataSource"
> init-method="init" destroy-method="close">
> <property name="className"
> value="oracle.jdbc.xa.client.OracleXADataSource" />
> <property name="uniqueName" value="jdbc/DS1" />
> <property name="maxPoolSize" value="5" />
> <property name="allowLocalTransactions" value="true" />
> <property name="testQuery" value="SELECT 1 FROM DUAL" />
> <property name="driverProperties">
> <props>
> <prop key="user">myuser</prop>
> <prop key="password">myuser</prop>
> <prop key="URL">myurl</prop>
> </props>
> </property>
> </bean>
>
>
> <bean id="btmConfig" factory-method="getConfiguration"
> class="bitronix.tm.TransactionManagerServices">
> <property name="serverId" value="spring-btm" />
> </bean>
>
>
> <bean id="BitronixTransactionManager"
> factory-method="getTransactionManager"
> class="bitronix.tm.TransactionManagerServices"
> depends-on="btmConfig"
> destroy-method="shutdown" />
>
>
> <bean id="JtaTransactionManager"
>
> class="org.springframework.transaction.jta.JtaTransactionManager">
> <property name="transactionManager"
> ref="BitronixTransactionManager" />
> <property name="userTransaction"
> ref="BitronixTransactionManager" />
> </bean>
> <!-- end of Bitronix Transaction Manager embedded configuration -->
>
> 3. and in the code:
> EntityManagerFactory emf =
> Persistence.createEntityManagerFactory("org.drools.persistence.jpa");
> Environment env = KnowledgeBaseFactory.newEnvironment();
> env.set(EnvironmentName.ENTITY_MANAGER_FACTORY, emf);
> env.set(EnvironmentName.GLOBALS, new MapGlobalResolver());
> env.set(EnvironmentName.TRANSACTION_MANAGER,
> TransactionManagerServices.getTransactionManager());
> ksession =
> JPAKnowledgeService.newStatefulKnowledgeSession(kbase, null,
> env);
>
> However in the last code I get:
>
> Caused by: java.lang.IllegalStateException:
> java.lang.reflect.InvocationTargetException
> at
>
> org.drools.persistence.jpa.KnowledgeStoreServiceImpl.buildCommanService(KnowledgeStoreServiceImpl.java:130)
> at
>
> org.drools.persistence.jpa.KnowledgeStoreServiceImpl.newStatefulKnowledgeSession(KnowledgeStoreServiceImpl.java:54)
> at
>
> org.drools.persistence.jpa.JPAKnowledgeService.newStatefulKnowledgeSession(JPAKnowledgeService.java:109)
> at
>
> com.mycompany.util.BookWorkflowUtilities.createSession(BookWorkflowUtilities.java:83)
> at
> com.mycompany.util.BookWorkflowService.init(BookWorkflowService.java:62)
> at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
> at
>
> sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
> at
>
> sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
> at java.lang.reflect.Method.invoke(Method.java:597)
> at
>
> org.springframework.beans.factory.annotation.InitDestroyAnnotationBeanPostProcessor$LifecycleElement.invoke(InitDestroyAnnotationBeanPostProcessor.java:340)
> at
>
> org.springframework.beans.factory.annotation.InitDestroyAnnotationBeanPostProcessor$LifecycleMetadata.invokeInitMethods(InitDestroyAnnotationBeanPostProcessor.java:293)
> at
>
> org.springframework.beans.factory.annotation.InitDestroyAnnotationBeanPostProcessor.postProcessBeforeInitialization(InitDestroyAnnotationBeanPostProcessor.java:130)
> ... 29 more
> Caused by: java.lang.reflect.InvocationTargetException
> at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native
> Method)
> at
>
> sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:39)
> at
>
> sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:27)
> at java.lang.reflect.Constructor.newInstance(Constructor.java:513)
> at
>
> org.drools.persistence.jpa.KnowledgeStoreServiceImpl.buildCommanService(KnowledgeStoreServiceImpl.java:116)
> ... 40 more
> Caused by: java.lang.RuntimeException: Could not commit session or rollback
> at
>
> org.drools.persistence.SingleSessionCommandService.<init>(SingleSessionCommandService.java:133)
> ... 45 more
> Caused by: java.lang.RuntimeException: Unable to rollback transaction
> at
>
> org.drools.persistence.jta.JtaTransactionManager.rollback(JtaTransactionManager.java:184)
> at
>
> org.drools.persistence.SingleSessionCommandService.<init>(SingleSessionCommandService.java:131)
> ... 45 more
> Caused by: java.lang.NullPointerException
> at
>
> org.drools.persistence.jta.JtaTransactionManager.rollback(JtaTransactionManager.java:181)
>
> --
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> View this message in context: RE: Caused by:
> java.lang.NullPointerException at
> org.drools.persistence.jta.JtaTransactionManager.rollback(JtaTransactionManager.java:181)<http://drools-java-rules-engine.46999.n3.nabble.com/Caused-by-java-lang-NullPointerException-at-org-drools-persistence-jta-JtaTransactionManager-rollbac-tp2602190p2602869.html>
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