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  1. Red Hat Process Automation Manager
  2. RHPAM-2

NullPointerException during transaction rollback when using CMT

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    • Icon: Bug Bug
    • Resolution: Done
    • Icon: Major Major
    • 7.2.0.GA
    • 6.x.x
    • jBPM Core
    • None
    • CR1
    • ?
    • Workaround Exists
    • Hide

      Use
      https://github.com/kiegroup/jbpm/blob/6.5.x/jbpm-persistence-jpa/src/main/java/org/jbpm/persistence/jta/ContainerManagedTransactionManager.java
      Instead of
      https://github.com/kiegroup/drools/blob/6.5.x/drools-persistence-jpa/src/main/java/org/drools/persistence/jta/JtaTransactionManager.java

      But it's a bit cumbersome to register it.

      1) Create Custom TransactionManagerFactory, where you will return this CMT Manager:

      package org.redhat.gss;

import org.drools.persistence.TransactionManager;
import org.drools.persistence.TransactionManagerFactory;
import org.jbpm.persistence.jta.ContainerManagedTransactionManager;
import org.kie.api.runtime.Environment;

public class CustomJtaFactory extends TransactionManagerFactory {

	@Override
	public TransactionManager newTransactionManager() {
		// TODO Auto-generated method stub
		return new ContainerManagedTransactionManager();
	}

	@Override
	public TransactionManager newTransactionManager(Environment arg0) {
		// TODO Auto-generated method stub
		return new ContainerManagedTransactionManager();
	}

}

      2) Package it as a jar and add it on the classpath. For example put it inside WEB-INF/lib folder of your application

      3) Configure BPM Suite to pick thew new factory by setting following system property:

          <system-properties>
  ...
        <property name="org.kie.txm.factory.class" value="org.redhat.gss.CustomJtaFactory"/>
    </system-properties>
      Show
      Use https://github.com/kiegroup/jbpm/blob/6.5.x/jbpm-persistence-jpa/src/main/java/org/jbpm/persistence/jta/ContainerManagedTransactionManager.java Instead of https://github.com/kiegroup/drools/blob/6.5.x/drools-persistence-jpa/src/main/java/org/drools/persistence/jta/JtaTransactionManager.java But it's a bit cumbersome to register it. 1) Create Custom TransactionManagerFactory, where you will return this CMT Manager: package org.redhat.gss; import org.drools.persistence.TransactionManager; import org.drools.persistence.TransactionManagerFactory; import org.jbpm.persistence.jta.ContainerManagedTransactionManager; import org.kie.api.runtime.Environment; public class CustomJtaFactory extends TransactionManagerFactory { @Override public TransactionManager newTransactionManager() { // TODO Auto-generated method stub return new ContainerManagedTransactionManager(); } @Override public TransactionManager newTransactionManager(Environment arg0) { // TODO Auto-generated method stub return new ContainerManagedTransactionManager(); } } 2) Package it as a jar and add it on the classpath. For example put it inside WEB-INF/lib folder of your application 3) Configure BPM Suite to pick thew new factory by setting following system property: <system-properties> ... <property name= "org.kie.txm.factory.class" value= "org.redhat.gss.CustomJtaFactory" /> </system-properties>
    • Hide
      • Create process start->ht->service task->end, build the KJAR with this process
      • Service Task throws some exception in its "executeWorkItem" method
      • Deploy jBPM app on top of JBoss EAP, use DeploymentService to deploy the kjar
      • Use ProcesService to start the process
      • Use UserTaskService to complete the human task

      Since ServiceTask throws exception, it will result in transaction rollback. At this point, NullPointerException will be observed in the log.

      Show
      Create process start->ht->service task->end, build the KJAR with this process Service Task throws some exception in its "executeWorkItem" method Deploy jBPM app on top of JBoss EAP, use DeploymentService to deploy the kjar Use ProcesService to start the process Use UserTaskService to complete the human task Since ServiceTask throws exception, it will result in transaction rollback. At this point, NullPointerException will be observed in the log.

      When using BPMS 6.4.4 in embedded mode, deployed on JBoss EAP 7.0 (but I assume it apply for other JavaEE application servers), there will be NPE during transaction rollback, if it's a CMT..i.e. executed within servlet, ejb..

      The transaction is still rolled back, but it shouldn't fail with NPE

      Full stacktrace:

      08:38:59,052 ERROR [io.undertow.request] (default task-3) UT005023: Exception handling request to /jbpm-ejb/autoCompleteTask: javax.ejb.EJBException: java.lang.RuntimeException: Could not commit session or rollback
	at org.jboss.as.ejb3.tx.CMTTxInterceptor.handleExceptionInOurTx(CMTTxInterceptor.java:187)
	at org.jboss.as.ejb3.tx.CMTTxInterceptor.invokeInOurTx(CMTTxInterceptor.java:277)
	at org.jboss.as.ejb3.tx.CMTTxInterceptor.required(CMTTxInterceptor.java:327)
	at org.jboss.as.ejb3.tx.CMTTxInterceptor.processInvocation(CMTTxInterceptor.java:239)
	at org.jboss.invocation.InterceptorContext.proceed(InterceptorContext.java:340)
	at org.jboss.as.ejb3.component.interceptors.CurrentInvocationContextInterceptor.processInvocation(CurrentInvocationContextInterceptor.java:41)
	at org.jboss.invocation.InterceptorContext.proceed(InterceptorContext.java:340)
	at org.jboss.as.ejb3.component.invocationmetrics.WaitTimeInterceptor.processInvocation(WaitTimeInterceptor.java:43)
	at org.jboss.invocation.InterceptorContext.proceed(InterceptorContext.java:340)
	at org.jboss.as.ejb3.security.SecurityContextInterceptor.processInvocation(SecurityContextInterceptor.java:100)
	at org.jboss.invocation.InterceptorContext.proceed(InterceptorContext.java:340)
	at org.jboss.as.ejb3.component.interceptors.ShutDownInterceptorFactory$1.processInvocation(ShutDownInterceptorFactory.java:64)
	at org.jboss.invocation.InterceptorContext.proceed(InterceptorContext.java:340)
	at org.jboss.as.ejb3.component.interceptors.LoggingInterceptor.processInvocation(LoggingInterceptor.java:66)
	at org.jboss.invocation.InterceptorContext.proceed(InterceptorContext.java:340)
	at org.jboss.as.ee.component.NamespaceContextInterceptor.processInvocation(NamespaceContextInterceptor.java:50)
	at org.jboss.invocation.InterceptorContext.proceed(InterceptorContext.java:340)
	at org.jboss.as.ejb3.component.interceptors.AdditionalSetupInterceptor.processInvocation(AdditionalSetupInterceptor.java:54)
	at org.jboss.invocation.InterceptorContext.proceed(InterceptorContext.java:340)
	at org.jboss.invocation.ContextClassLoaderInterceptor.processInvocation(ContextClassLoaderInterceptor.java:64)
	at org.jboss.invocation.InterceptorContext.proceed(InterceptorContext.java:340)
	at org.jboss.invocation.InterceptorContext.run(InterceptorContext.java:356)
	at org.wildfly.security.manager.WildFlySecurityManager.doChecked(WildFlySecurityManager.java:636)
	at org.jboss.invocation.AccessCheckingInterceptor.processInvocation(AccessCheckingInterceptor.java:61)
	at org.jboss.invocation.InterceptorContext.proceed(InterceptorContext.java:340)
	at org.jboss.invocation.InterceptorContext.run(InterceptorContext.java:356)
	at org.jboss.invocation.PrivilegedWithCombinerInterceptor.processInvocation(PrivilegedWithCombinerInterceptor.java:80)
	at org.jboss.invocation.InterceptorContext.proceed(InterceptorContext.java:340)
	at org.jboss.invocation.ChainedInterceptor.processInvocation(ChainedInterceptor.java:61)
	at org.jboss.as.ee.component.ViewService$View.invoke(ViewService.java:198)
	at org.jboss.as.ee.component.ViewDescription$1.processInvocation(ViewDescription.java:185)
	at org.jboss.invocation.InterceptorContext.proceed(InterceptorContext.java:340)
	at org.jboss.invocation.ChainedInterceptor.processInvocation(ChainedInterceptor.java:61)
	at org.jboss.as.ee.component.ProxyInvocationHandler.invoke(ProxyInvocationHandler.java:73)
	at org.jbpm.services.ejb.api.UserTaskServiceEJBLocal$$$view45.completeAutoProgress(Unknown Source)
	at be.mainsys.business.process.example.ejb.EjbAutoCompleteTask.doGet(EjbAutoCompleteTask.java:41)
	at javax.servlet.http.HttpServlet.service(HttpServlet.java:687)
	at javax.servlet.http.HttpServlet.service(HttpServlet.java:790)
	at io.undertow.servlet.handlers.ServletHandler.handleRequest(ServletHandler.java:85)
	at io.undertow.servlet.handlers.security.ServletSecurityRoleHandler.handleRequest(ServletSecurityRoleHandler.java:62)
	at io.undertow.servlet.handlers.ServletDispatchingHandler.handleRequest(ServletDispatchingHandler.java:36)
	at org.wildfly.extension.undertow.security.SecurityContextAssociationHandler.handleRequest(SecurityContextAssociationHandler.java:78)
	at io.undertow.server.handlers.PredicateHandler.handleRequest(PredicateHandler.java:43)
	at io.undertow.servlet.handlers.security.SSLInformationAssociationHandler.handleRequest(SSLInformationAssociationHandler.java:131)
	at io.undertow.servlet.handlers.security.ServletAuthenticationCallHandler.handleRequest(ServletAuthenticationCallHandler.java:57)
	at io.undertow.server.handlers.PredicateHandler.handleRequest(PredicateHandler.java:43)
	at io.undertow.security.handlers.AbstractConfidentialityHandler.handleRequest(AbstractConfidentialityHandler.java:46)
	at io.undertow.servlet.handlers.security.ServletConfidentialityConstraintHandler.handleRequest(ServletConfidentialityConstraintHandler.java:64)
	at io.undertow.security.handlers.AuthenticationMechanismsHandler.handleRequest(AuthenticationMechanismsHandler.java:60)
	at io.undertow.servlet.handlers.security.CachedAuthenticatedSessionHandler.handleRequest(CachedAuthenticatedSessionHandler.java:77)
	at io.undertow.security.handlers.NotificationReceiverHandler.handleRequest(NotificationReceiverHandler.java:50)
	at io.undertow.security.handlers.AbstractSecurityContextAssociationHandler.handleRequest(AbstractSecurityContextAssociationHandler.java:43)
	at io.undertow.server.handlers.PredicateHandler.handleRequest(PredicateHandler.java:43)
	at org.wildfly.extension.undertow.security.jacc.JACCContextIdHandler.handleRequest(JACCContextIdHandler.java:61)
	at io.undertow.server.handlers.PredicateHandler.handleRequest(PredicateHandler.java:43)
	at io.undertow.server.handlers.PredicateHandler.handleRequest(PredicateHandler.java:43)
	at io.undertow.servlet.handlers.ServletInitialHandler.handleFirstRequest(ServletInitialHandler.java:285)
	at io.undertow.servlet.handlers.ServletInitialHandler.dispatchRequest(ServletInitialHandler.java:264)
	at io.undertow.servlet.handlers.ServletInitialHandler.access$000(ServletInitialHandler.java:81)
	at io.undertow.servlet.handlers.ServletInitialHandler$1.handleRequest(ServletInitialHandler.java:175)
	at io.undertow.server.Connectors.executeRootHandler(Connectors.java:207)
	at io.undertow.server.HttpServerExchange$1.run(HttpServerExchange.java:802)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
	at java.lang.Thread.run(Thread.java:745)
Caused by: java.lang.RuntimeException: Could not commit session or rollback
	at org.jbpm.services.task.persistence.TaskTransactionInterceptor.rollbackTransaction(TaskTransactionInterceptor.java:102)
	at org.jbpm.services.task.persistence.TaskTransactionInterceptor.execute(TaskTransactionInterceptor.java:87)
	at org.drools.core.command.impl.AbstractInterceptor.executeNext(AbstractInterceptor.java:41)
	at org.drools.persistence.jta.TransactionLockInterceptor.execute(TransactionLockInterceptor.java:73)
	at org.drools.core.command.impl.AbstractInterceptor.executeNext(AbstractInterceptor.java:41)
	at org.drools.persistence.jpa.OptimisticLockRetryInterceptor.execute(OptimisticLockRetryInterceptor.java:82)
	at org.jbpm.services.task.commands.TaskCommandExecutorImpl.execute(TaskCommandExecutorImpl.java:40)
	at org.jbpm.services.task.impl.command.CommandBasedTaskService.complete(CommandBasedTaskService.java:174)
	at org.jbpm.kie.services.impl.UserTaskServiceImpl.completeAutoProgress(UserTaskServiceImpl.java:222)
	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
	at java.lang.reflect.Method.invoke(Method.java:497)
	at org.jboss.as.ee.component.ManagedReferenceMethodInterceptor.processInvocation(ManagedReferenceMethodInterceptor.java:52)
	at org.jboss.invocation.InterceptorContext.proceed(InterceptorContext.java:340)
	at org.jboss.invocation.InterceptorContext$Invocation.proceed(InterceptorContext.java:437)
	at org.jboss.as.weld.ejb.Jsr299BindingsInterceptor.doMethodInterception(Jsr299BindingsInterceptor.java:82)
	at org.jboss.as.weld.ejb.Jsr299BindingsInterceptor.processInvocation(Jsr299BindingsInterceptor.java:93)
	at org.jboss.as.ee.component.interceptors.UserInterceptorFactory$1.processInvocation(UserInterceptorFactory.java:63)
	at org.jboss.invocation.InterceptorContext.proceed(InterceptorContext.java:340)
	at org.jboss.as.ejb3.component.invocationmetrics.ExecutionTimeInterceptor.processInvocation(ExecutionTimeInterceptor.java:43)
	at org.jboss.invocation.InterceptorContext.proceed(InterceptorContext.java:340)
	at org.jboss.as.jpa.interceptor.SBInvocationInterceptor.processInvocation(SBInvocationInterceptor.java:47)
	at org.jboss.invocation.InterceptorContext.proceed(InterceptorContext.java:340)
	at org.jboss.invocation.InterceptorContext$Invocation.proceed(InterceptorContext.java:437)
	at org.jboss.weld.ejb.AbstractEJBRequestScopeActivationInterceptor.aroundInvoke(AbstractEJBRequestScopeActivationInterceptor.java:64)
	at org.jboss.as.weld.ejb.EjbRequestScopeActivationInterceptor.processInvocation(EjbRequestScopeActivationInterceptor.java:83)
	at org.jboss.invocation.InterceptorContext.proceed(InterceptorContext.java:340)
	at org.jboss.as.ee.concurrent.ConcurrentContextInterceptor.processInvocation(ConcurrentContextInterceptor.java:45)
	at org.jboss.invocation.InterceptorContext.proceed(InterceptorContext.java:340)
	at org.jboss.invocation.InitialInterceptor.processInvocation(InitialInterceptor.java:21)
	at org.jboss.invocation.InterceptorContext.proceed(InterceptorContext.java:340)
	at org.jboss.invocation.ChainedInterceptor.processInvocation(ChainedInterceptor.java:61)
	at org.jboss.as.ee.component.interceptors.ComponentDispatcherInterceptor.processInvocation(ComponentDispatcherInterceptor.java:52)
	at org.jboss.invocation.InterceptorContext.proceed(InterceptorContext.java:340)
	at org.jboss.as.ejb3.component.pool.PooledInstanceInterceptor.processInvocation(PooledInstanceInterceptor.java:51)
	at org.jboss.invocation.InterceptorContext.proceed(InterceptorContext.java:340)
	at org.jboss.as.ejb3.tx.CMTTxInterceptor.invokeInOurTx(CMTTxInterceptor.java:275)
	... 63 more
Caused by: java.lang.RuntimeException: Unable to rollback transaction
	at org.drools.persistence.jta.JtaTransactionManager.rollback(JtaTransactionManager.java:259)
	at org.jbpm.services.task.persistence.TaskTransactionInterceptor.rollbackTransaction(TaskTransactionInterceptor.java:99)
	... 100 more
Caused by: java.lang.NullPointerException
	at org.drools.persistence.jta.JtaTransactionManager.rollback(JtaTransactionManager.java:255)
	... 101 more

              elguardian@gmail.com Enrique González Martínez (Inactive)
              rhn-support-agiertli Anton Giertli
              Marian Macik Marian Macik
              Marian Macik Marian Macik
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                Created:
                Updated:
                Resolved: