[rules-users] Caused by: java.lang.NullPointerException at org.drools.persistence.jta.JtaTransactionManager.rollback(JtaTransactionManager.java:181)
Esteban Aliverti
esteban.aliverti at gmail.com
Tue Mar 1 07:30:15 EST 2011
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 <odelyay at sintecmedia.com>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)
>
> --
> View this message in context:
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