[rules-users] Caused by: java.lang.NullPointerException at org.drools.persistence.jta.JtaTransactionManager.rollback(JtaTransactionManager.java:181)
odelyaholiday
odelyay at sintecmedia.com
Tue Mar 1 07:54:21 EST 2011
Thanks!
Can you elaborate the solution?
From: Esteban [via Drools - Java Rules Engine] [mailto:ml-node+2602731-307701276-281203 at n3.nabble.com]
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]</user/SendEmail.jtp?type=node&node=2602731&i=0>> 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: http://drools-java-rules-engine.46999.n3.nabble.com/Caused-by-java-lang-NullPointerException-at-org-drools-persistence-jta-JtaTransactionManager-rollbac-tp2602190p2602190.html<http://drools-java-rules-engine.46999.n3.nabble.com/Caused-by-java-lang-NullPointerException-at-org-drools-persistence-jta-JtaTransactionManager-rollbac-tp2602190p2602190.html?by-user=t>
Sent from the Drools - User mailing list archive at Nabble.com.
_______________________________________________
rules-users mailing list
[hidden email]</user/SendEmail.jtp?type=node&node=2602731&i=1>
https://lists.jboss.org/mailman/listinfo/rules-users
_______________________________________________
rules-users mailing list
[hidden email]</user/SendEmail.jtp?type=node&node=2602731&i=2>
https://lists.jboss.org/mailman/listinfo/rules-users
________________________________
If you reply to this email, your message will be added to the discussion below:
http://drools-java-rules-engine.46999.n3.nabble.com/Caused-by-java-lang-NullPointerException-at-org-drools-persistence-jta-JtaTransactionManager-rollbac-tp2602190p2602731.html
To unsubscribe from Caused by: java.lang.NullPointerException at org.drools.persistence.jta.JtaTransactionManager.rollback(JtaTransactionManager.java:181), click here<http://drools-java-rules-engine.46999.n3.nabble.com/template/NamlServlet.jtp?macro=unsubscribe_by_code&node=2602190&code=b2RlbHlheUBzaW50ZWNtZWRpYS5jb218MjYwMjE5MHwtNzAwNzc0Nzc0>.
--
View this message in context: http://drools-java-rules-engine.46999.n3.nabble.com/Caused-by-java-lang-NullPointerException-at-org-drools-persistence-jta-JtaTransactionManager-rollbac-tp2602190p2602869.html
Sent from the Drools - User mailing list archive at Nabble.com.
-------------- next part --------------
An HTML attachment was scrubbed...
URL: http://lists.jboss.org/pipermail/rules-users/attachments/20110301/034ddb45/attachment.html
More information about the rules-users
mailing list