I think I have got rid of this problem but I faced with another... - When I invoke ejb method (which add some data to a data base) from jBPM action I get the following stack: 18:10:13,812 INFO [UniqIDBean] uid-ejb creation | 18:10:13,843 WARN [loggerI18N] [com.arjuna.ats.internal.jta.transaction.arjunacore.lastResource.disallow] [com.arjuna.ats.internal.jta.transaction.arjunacore.lastResource.disallow] Adding multiple last resources is disallowed. Current resource is org.jboss.resource.connectionmanager.TxConnectionManager$LocalXAResource@90da06 | 18:10:13,858 ERROR [UniqIDBean] org.jboss.util.NestedSQLException: Could not enlist in transaction on entering meta-aware object!; - nested throwable: (javax.transaction.SystemException: java.lang.Throwable: Unabled to enlist resource, see the previous warnings. tx=TransactionImple < ac, BasicAction: ae96860:104a:4843fd25:407 status: ActionStatus.ABORT_ONLY >); - nested throwable: (org.jboss.resource.JBossResourceException: Could not enlist in transaction on entering meta-aware object!; - nested throwable: (javax.transaction.SystemException: java.lang.Throwable: Unabled to enlist resource, see the previous warnings. tx=TransactionImple < ac, BasicAction: ae96860:104a:4843fd25:407 status: ActionStatus.ABORT_ONLY >)) | 18:10:13,858 ERROR [LogInterceptor] TransactionRolledbackException in method: public abstract com.tsystems.tintra4.ejb.uid.UniqID com.tsystems.tintra4.ejb.uid.UniqIDHome.create() throws java.rmi.RemoteException,javax.ejb.CreateException, causedBy: | java.lang.NullPointerException | at com.tsystems.tintra4.ejb.uid.UniqIDBean.ejbCreate(UniqIDBean.java:164) | 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:585) | at org.jboss.ejb.plugins.BMPPersistenceManager.createEntity(BMPPersistenceManager.java:205) | at org.jboss.resource.connectionmanager.CachedConnectionInterceptor.createEntity(CachedConnectionInterceptor.java:225) | at org.jboss.ejb.EntityContainer.createHome(EntityContainer.java:779) | 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:585) | at org.jboss.invocation.Invocation.performCall(Invocation.java:359) | at org.jboss.ejb.EntityContainer$ContainerInterceptor.invokeHome(EntityContainer.java:1126) | at org.jboss.ejb.plugins.EntitySynchronizationInterceptor.invokeHome(EntitySynchronizationInterceptor.java:203) | at org.jboss.resource.connectionmanager.CachedConnectionInterceptor.invokeHome(CachedConnectionInterceptor.java:189) | at org.jboss.ejb.plugins.AbstractInterceptor.invokeHome(AbstractInterceptor.java:105) | at org.jboss.ejb.plugins.EntityInstanceInterceptor.invokeHome(EntityInstanceInterceptor.java:136) | at org.jboss.ejb.plugins.EntityLockInterceptor.invokeHome(EntityLockInterceptor.java:76) | at org.jboss.ejb.plugins.EntityCreationInterceptor.invokeHome(EntityCreationInterceptor.java:45) | at org.jboss.ejb.plugins.CallValidationInterceptor.invokeHome(CallValidationInterceptor.java:56) | at org.jboss.ejb.plugins.AbstractTxInterceptor.invokeNext(AbstractTxInterceptor.java:125) | at org.jboss.ejb.plugins.TxInterceptorCMT.runWithTransactions(TxInterceptorCMT.java:350) | at org.jboss.ejb.plugins.TxInterceptorCMT.invokeHome(TxInterceptorCMT.java:161) | at org.jboss.ejb.plugins.SecurityInterceptor.invokeHome(SecurityInterceptor.java:145) | at org.jboss.ejb.plugins.LogInterceptor.invokeHome(LogInterceptor.java:132) | at org.jboss.ejb.plugins.ProxyFactoryFinderInterceptor.invokeHome(ProxyFactoryFinderInterceptor.java:107) | at org.jboss.ejb.EntityContainer.internalInvokeHome(EntityContainer.java:521) | at org.jboss.ejb.Container.invoke(Container.java:981) | 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:585) | at org.jboss.mx.interceptor.ReflectedDispatcher.invoke(ReflectedDispatcher.java:155) | at org.jboss.mx.server.Invocation.dispatch(Invocation.java:94) | at org.jboss.mx.server.Invocation.invoke(Invocation.java:86) | at org.jboss.mx.server.AbstractMBeanInvoker.invoke(AbstractMBeanInvoker.java:264) | at org.jboss.mx.server.MBeanServerImpl.invoke(MBeanServerImpl.java:659) | at org.jboss.invocation.local.LocalInvoker$MBeanServerAction.invoke(LocalInvoker.java:169) | at org.jboss.invocation.local.LocalInvoker.invoke(LocalInvoker.java:118) | at org.jboss.invocation.InvokerInterceptor.invokeLocal(InvokerInterceptor.java:209) | at org.jboss.invocation.InvokerInterceptor.invoke(InvokerInterceptor.java:195) | at org.jboss.proxy.TransactionInterceptor.invoke(TransactionInterceptor.java:61) | at org.jboss.proxy.SecurityInterceptor.invoke(SecurityInterceptor.java:70) | at org.jboss.proxy.ejb.HomeInterceptor.invoke(HomeInterceptor.java:184) | at org.jboss.proxy.ClientContainer.invoke(ClientContainer.java:100) | at $Proxy204.create(Unknown Source) | at com.tsystems.tintra4.ejb.cf.session.PersonalInfoBean.getNewID(PersonalInfoBean.java:1173) | at com.tsystems.tintra4.ejb.cf.session.PersonalInfoBean.addEmployee(PersonalInfoBean.java:732) | at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) | at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39) | at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25) | at java.lang.reflect.Method.invoke(Method.java:585) | at org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:112) | at org.jboss.ejb3.interceptor.InvocationContextImpl.proceed(InvocationContextImpl.java:166) | at org.jboss.ejb3.interceptor.EJB3InterceptorsInterceptor.invoke(EJB3InterceptorsInterceptor.java:63) | at org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:101) | at org.jboss.ejb3.entity.TransactionScopedEntityManagerInterceptor.invoke(TransactionScopedEntityManagerInterceptor.java:54) | at org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:101) | at org.jboss.ejb3.AllowedOperationsInterceptor.invoke(AllowedOperationsInterceptor.java:47) | at org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:101) | at org.jboss.aspects.tx.TxPolicy.invokeInCallerTx(TxPolicy.java:126) | at org.jboss.aspects.tx.TxInterceptor$Required.invoke(TxInterceptor.java:195) | at org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:101) | at org.jboss.aspects.tx.TxPropagationInterceptor.invoke(TxPropagationInterceptor.java:95) | at org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:101) | at org.jboss.ejb3.stateless.StatelessInstanceInterceptor.invoke(StatelessInstanceInterceptor.java:62) | at org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:101) | at org.jboss.aspects.security.RoleBasedAuthorizationInterceptor.invoke(RoleBasedAuthorizationInterceptor.java:166) | at org.jboss.ejb3.security.RoleBasedAuthorizationInterceptor.invoke(RoleBasedAuthorizationInterceptor.java:115) | at org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:101) | at org.jboss.aspects.security.AuthenticationInterceptor.invoke(AuthenticationInterceptor.java:77) | at org.jboss.ejb3.security.Ejb3AuthenticationInterceptor.invoke(Ejb3AuthenticationInterceptor.java:110) | at org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:101) | at org.jboss.ejb3.ENCPropagationInterceptor.invoke(ENCPropagationInterceptor.java:46) | at org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:101) | at org.jboss.ejb3.asynchronous.AsynchronousInterceptor.invoke(AsynchronousInterceptor.java:106) | at org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:101) | at org.jboss.ejb3.stateless.StatelessContainer.dynamicInvoke(StatelessContainer.java:304) | at org.jboss.ejb3.remoting.IsLocalInterceptor.invokeLocal(IsLocalInterceptor.java:81) | at org.jboss.ejb3.remoting.IsLocalInterceptor.invoke(IsLocalInterceptor.java:72) | at org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:101) | at org.jboss.ejb3.stateless.StatelessRemoteProxy.invoke(StatelessRemoteProxy.java:107) | at $Proxy203.addEmployee(Unknown Source) | at com.tsystems.tintra4.handler.cf.HRtoCFHandler.execute(HRtoCFHandler.java:52) | at org.jbpm.graph.def.Action.execute(Action.java:122) | at org.jbpm.graph.def.GraphElement.executeAction(GraphElement.java:264) | at org.jbpm.graph.def.GraphElement.executeActions(GraphElement.java:220) | at org.jbpm.graph.def.GraphElement.fireAndPropagateEvent(GraphElement.java:190) | at org.jbpm.graph.def.GraphElement.fireEvent(GraphElement.java:174) | at org.jbpm.graph.def.Transition.take(Transition.java:138) | at org.jbpm.graph.def.Node.leave(Node.java:394) | at org.jbpm.graph.node.StartState.leave(StartState.java:70) | 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:585) | at org.hibernate.proxy.pojo.javassist.JavassistLazyInitializer.invoke(JavassistLazyInitializer.java:173) | at org.jbpm.graph.def.Node_$$_javassist_86.leave(Node_$$_javassist_86.java) | at org.jbpm.graph.exe.Token.signal(Token.java:195) | at org.jbpm.graph.exe.Token.signal(Token.java:140) | 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:585) | at org.hibernate.proxy.pojo.javassist.JavassistLazyInitializer.invoke(JavassistLazyInitializer.java:173) | at org.jbpm.graph.exe.Token_$$_javassist_101.signal(Token_$$_javassist_101.java) | at org.jbpm.command.SignalCommand.execute(SignalCommand.java:91) | at org.jboss.soa.esb.services.jbpm.cmd.AsyncProcessSignal$AsyncSignalAction.execute(AsyncProcessSignal.java:287) | at org.jbpm.graph.def.Action.execute(Action.java:122) | 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:585) | at org.hibernate.proxy.pojo.javassist.JavassistLazyInitializer.invoke(JavassistLazyInitializer.java:173) | at org.jbpm.graph.def.Action_$$_javassist_100.execute(Action_$$_javassist_100.java) | at org.jbpm.graph.def.GraphElement.executeAction(GraphElement.java:264) | 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:585) | at org.hibernate.proxy.pojo.javassist.JavassistLazyInitializer.invoke(JavassistLazyInitializer.java:173) | at org.jbpm.graph.def.Node_$$_javassist_86.executeAction(Node_$$_javassist_86.java) | at org.jbpm.job.ExecuteActionJob.execute(ExecuteActionJob.java:32) | 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:585) | at org.hibernate.proxy.pojo.javassist.JavassistLazyInitializer.invoke(JavassistLazyInitializer.java:173) | at org.jbpm.job.Job_$$_javassist_91.execute(Job_$$_javassist_91.java) | at org.jbpm.job.executor.JobExecutorThread.executeJob(JobExecutorThread.java:164) | at org.jbpm.job.executor.JobExecutorThread.run(JobExecutorThread.java:64) Should I configure data sources as XA or are there any other ways? 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