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 ;)
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@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)
--
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