Reza Ghalavand [https://community.jboss.org/people/allgreenphosphor] created 
the discussion

"Re: WorkItemHandler Deployment Problem"

To view the discussion, visit: https://community.jboss.org/message/761111#761111

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I think this may help as well, I've taken it from server.log:

15:12:02,146 WARN  [com.arjuna.ats.jta] (http-localhost-127.0.0.1-8080-4) 
ARJUNA16029: SynchronizationImple.afterCompletion - failed for 
org.drools.persistence.jta.JtaTransactionSynchronizationAdapter@460051 with 
exception: [Error: unable to resolve class: com.myTask.WorkItemHandler from 
[Module "deployment.jbpm-gwt-console-server.war:main" from Service Module 
Loader]]
[Near : {... "MyLog": new com.myTask.WorkItemHandler(), ....}]
                          ^
[Line: 5, Column: 14]
          at 
org.mvel2.ast.NewObjectNode.getReducedValue(NewObjectNode.java:294) 
[mvel2-2.1.0.drools16.jar:]
          at 
org.mvel2.MVELInterpretedRuntime.parseAndExecuteInterpreted(MVELInterpretedRuntime.java:106)
 [mvel2-2.1.0.drools16.jar:]
          at 
org.mvel2.MVELInterpretedRuntime.parse(MVELInterpretedRuntime.java:49) 
[mvel2-2.1.0.drools16.jar:]
          at org.mvel2.MVEL.eval(MVEL.java:150) [mvel2-2.1.0.drools16.jar:]
          at 
org.mvel2.ast.InlineCollectionNode.execGraph(InlineCollectionNode.java:180) 
[mvel2-2.1.0.drools16.jar:]
          at 
org.mvel2.ast.InlineCollectionNode.execGraph(InlineCollectionNode.java:138) 
[mvel2-2.1.0.drools16.jar:]
          at 
org.mvel2.ast.InlineCollectionNode.getReducedValue(InlineCollectionNode.java:105)
 [mvel2-2.1.0.drools16.jar:]
          at 
org.mvel2.MVELInterpretedRuntime.parseAndExecuteInterpreted(MVELInterpretedRuntime.java:106)
 [mvel2-2.1.0.drools16.jar:]
          at 
org.mvel2.MVELInterpretedRuntime.parse(MVELInterpretedRuntime.java:49) 
[mvel2-2.1.0.drools16.jar:]
          at org.mvel2.MVEL.eval(MVEL.java:165) [mvel2-2.1.0.drools16.jar:]
          at 
org.drools.SessionConfiguration.loadWorkItemHandlers(SessionConfiguration.java:304)
 [drools-core-5.4.0.Final.jar:]
          at 
org.drools.SessionConfiguration.initWorkItemHandlers(SessionConfiguration.java:294)
 [drools-core-5.4.0.Final.jar:]
          at 
org.drools.SessionConfiguration.getWorkItemHandlers(SessionConfiguration.java:269)
 [drools-core-5.4.0.Final.jar:]
          at 
org.drools.common.AbstractWorkingMemory.getWorkItemManager(AbstractWorkingMemory.java:1106)
 [drools-core-5.4.0.Final.jar:]
          at 
org.drools.impl.StatefulKnowledgeSessionImpl.getWorkItemManager(StatefulKnowledgeSessionImpl.java:311)
 [drools-core-5.4.0.Final.jar:]
          at 
org.drools.persistence.SingleSessionCommandService$SynchronizationImpl.afterCompletion(SingleSessionCommandService.java:452)
 [drools-persistence-jpa-5.4.0.Final.jar:]
          at 
org.drools.persistence.jta.JtaTransactionSynchronizationAdapter.afterCompletion(JtaTransactionSynchronizationAdapter.java:22)
 [drools-persistence-jpa-5.4.0.Final.jar:]
          at 
com.arjuna.ats.internal.jta.resources.arjunacore.SynchronizationImple.afterCompletion(SynchronizationImple.java:117)
          at 
com.arjuna.ats.arjuna.coordinator.TwoPhaseCoordinator.afterCompletion(TwoPhaseCoordinator.java:403)
          at 
com.arjuna.ats.arjuna.coordinator.TwoPhaseCoordinator.end(TwoPhaseCoordinator.java:104)
          at com.arjuna.ats.arjuna.AtomicAction.commit(AtomicAction.java:159)
          at 
com.arjuna.ats.internal.jta.transaction.arjunacore.TransactionImple.commitAndDisassociate(TransactionImple.java:1159)
          at 
com.arjuna.ats.internal.jta.transaction.arjunacore.BaseTransaction.commit(BaseTransaction.java:119)
          at 
org.drools.persistence.jta.JtaTransactionManager.commit(JtaTransactionManager.java:179)
 [drools-persistence-jpa-5.4.0.Final.jar:]
          at 
org.drools.persistence.SingleSessionCommandService.<init>(SingleSessionCommandService.java:155)
 [drools-persistence-jpa-5.4.0.Final.jar:]
          at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native 
Method) [:1.7.0_07]
          at 
sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:57)
 [:1.7.0_07]
          at 
sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
 [:1.7.0_07]
          at java.lang.reflect.Constructor.newInstance(Constructor.java:525) 
[:1.7.0_07]
          at 
org.drools.persistence.jpa.KnowledgeStoreServiceImpl.buildCommandService(KnowledgeStoreServiceImpl.java:129)
 [drools-persistence-jpa-5.4.0.Final.jar:]
          at 
org.drools.persistence.jpa.KnowledgeStoreServiceImpl.newStatefulKnowledgeSession(KnowledgeStoreServiceImpl.java:67)
 [drools-persistence-jpa-5.4.0.Final.jar:]
          at 
org.drools.persistence.jpa.JPAKnowledgeService.newStatefulKnowledgeSession(JPAKnowledgeService.java:122)
 [knowledge-api-5.4.0.Final.jar:]
          at 
org.jbpm.integration.console.StatefulKnowledgeSessionUtil.createOrLoadStatefulKnowledgeSession(StatefulKnowledgeSessionUtil.java:310)
 [jbpm-gwt-core-5.3.0.Final.jar:]
          at 
org.jbpm.integration.console.StatefulKnowledgeSessionUtil.initializeStatefulKnowledgeSession(StatefulKnowledgeSessionUtil.java:154)
 [jbpm-gwt-core-5.3.0.Final.jar:]
          at 
org.jbpm.integration.console.StatefulKnowledgeSessionUtil$SessionHolder.<clinit>(StatefulKnowledgeSessionUtil.java:127)
 [jbpm-gwt-core-5.3.0.Final.jar:]
          at 
org.jbpm.integration.console.StatefulKnowledgeSessionUtil.getStatefulKnowledgeSession(StatefulKnowledgeSessionUtil.java:131)
 [jbpm-gwt-core-5.3.0.Final.jar:]
          at 
org.jbpm.integration.console.SessionInitializer.<init>(SessionInitializer.java:25)
 [jbpm-gwt-core-5.3.0.Final.jar:]
          at 
org.jbpm.integration.console.TaskManagement.<init>(TaskManagement.java:51) 
[jbpm-gwt-core-5.3.0.Final.jar:]
          at 
org.jbpm.integration.console.ManagementFactory.createTaskManagement(ManagementFactory.java:26)
 [jbpm-gwt-core-5.3.0.Final.jar:]
          at 
org.jbpm.integration.console.ManagementFactory.createTaskManagement(ManagementFactory.java:19)
 [jbpm-gwt-core-5.3.0.Final.jar:]
          at 
org.jboss.bpm.console.server.TaskListFacade.getTaskManagement(TaskListFacade.java:72)
 [classes:]
          at 
org.jboss.bpm.console.server.TaskListFacade.getTasksForIdRef(TaskListFacade.java:101)
 [classes:]
          at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) 
[:1.7.0_07]
          at 
sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57) 
[:1.7.0_07]
          at 
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
 [:1.7.0_07]
          at java.lang.reflect.Method.invoke(Method.java:601) [:1.7.0_07]
          at 
org.jboss.resteasy.core.MethodInjectorImpl.invoke(MethodInjectorImpl.java:140) 
[resteasy-jaxrs-2.2.1.GA.jar:]
          at 
org.jboss.resteasy.core.ResourceMethod.invokeOnTarget(ResourceMethod.java:255) 
[resteasy-jaxrs-2.2.1.GA.jar:]
          at 
org.jboss.resteasy.core.ResourceMethod.invoke(ResourceMethod.java:220) 
[resteasy-jaxrs-2.2.1.GA.jar:]
          at 
org.jboss.resteasy.core.ResourceMethod.invoke(ResourceMethod.java:209) 
[resteasy-jaxrs-2.2.1.GA.jar:]
          at 
org.jboss.resteasy.core.SynchronousDispatcher.getResponse(SynchronousDispatcher.java:519)
 [resteasy-jaxrs-2.2.1.GA.jar:]
          at 
org.jboss.resteasy.core.SynchronousDispatcher.invoke(SynchronousDispatcher.java:496)
 [resteasy-jaxrs-2.2.1.GA.jar:]
          at 
org.jboss.resteasy.core.SynchronousDispatcher.invoke(SynchronousDispatcher.java:119)
 [resteasy-jaxrs-2.2.1.GA.jar:]
          at 
org.jboss.resteasy.plugins.server.servlet.ServletContainerDispatcher.service(ServletContainerDispatcher.java:208)
 [resteasy-jaxrs-2.2.1.GA.jar:]
          at 
org.jboss.resteasy.plugins.server.servlet.HttpServletDispatcher.service(HttpServletDispatcher.java:55)
 [resteasy-jaxrs-2.2.1.GA.jar:]
          at 
org.jboss.resteasy.plugins.server.servlet.HttpServletDispatcher.service(HttpServletDispatcher.java:50)
 [resteasy-jaxrs-2.2.1.GA.jar:]
          at javax.servlet.http.HttpServlet.service(HttpServlet.java:847) 
[jboss-servlet-api_3.0_spec-1.0.0.Final.jar:1.0.0.Final]
          at 
org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:329)
 [jbossweb-7.0.1.Final.jar:7.0.2.Final]
          at 
org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:248)
 [jbossweb-7.0.1.Final.jar:7.0.2.Final]
          at 
org.jboss.bpm.console.server.util.GWTJsonFilter.doFilter(GWTJsonFilter.java:59) 
[classes:]
          at 
org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:280)
 [jbossweb-7.0.1.Final.jar:7.0.2.Final]
          at 
org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:248)
 [jbossweb-7.0.1.Final.jar:7.0.2.Final]
          at 
org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:275)
 [jbossweb-7.0.1.Final.jar:7.0.2.Final]
          at 
org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:161)
 [jbossweb-7.0.1.Final.jar:7.0.2.Final]
          at 
org.jboss.as.web.security.SecurityContextAssociationValve.invoke(SecurityContextAssociationValve.java:139)
 [jboss-as-web-7.0.2.Final.jar:7.0.2.Final]
          at 
org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:480)
 [jbossweb-7.0.1.Final.jar:7.0.2.Final]
          at org.jboss.as.web.NamingValve.invoke(NamingValve.java:57) 
[jboss-as-web-7.0.2.Final.jar:7.0.2.Final]
          at 
org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:154) 
[jbossweb-7.0.1.Final.jar:7.0.2.Final]
          at 
org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:102) 
[jbossweb-7.0.1.Final.jar:7.0.2.Final]
          at 
org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109)
 [jbossweb-7.0.1.Final.jar:7.0.2.Final]
          at 
org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:362) 
[jbossweb-7.0.1.Final.jar:7.0.2.Final]
          at 
org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:877) 
[jbossweb-7.0.1.Final.jar:7.0.2.Final]
          at 
org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:667)
 [jbossweb-7.0.1.Final.jar:7.0.2.Final]
          at 
org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:952) 
[jbossweb-7.0.1.Final.jar:7.0.2.Final]
          at java.lang.Thread.run(Thread.java:722) [:1.7.0_07]
Caused by: java.lang.ClassNotFoundException: com.myTask.WorkItemHandler from 
[Module "deployment.jbpm-gwt-console-server.war:main" from Service Module 
Loader]
          at 
org.jboss.modules.ModuleClassLoader.findClass(ModuleClassLoader.java:191)
          at 
org.jboss.modules.ConcurrentClassLoader.performLoadClassChecked(ConcurrentClassLoader.java:361)
          at 
org.jboss.modules.ConcurrentClassLoader.performLoadClassChecked(ConcurrentClassLoader.java:333)
          at 
org.jboss.modules.ConcurrentClassLoader.performLoadClass(ConcurrentClassLoader.java:310)
          at 
org.jboss.modules.ConcurrentClassLoader.loadClass(ConcurrentClassLoader.java:103)
          at java.lang.Class.forName0(Native Method) [:1.7.0_07]
          at java.lang.Class.forName(Class.java:264) [:1.7.0_07]
          at org.mvel2.util.ParseTools.createClass(ParseTools.java:517) 
[mvel2-2.1.0.drools16.jar:]
          at org.mvel2.util.ParseTools.findClass(ParseTools.java:944) 
[mvel2-2.1.0.drools16.jar:]
          at 
org.mvel2.ast.NewObjectNode.getReducedValue(NewObjectNode.java:256) 
[mvel2-2.1.0.drools16.jar:]
          ... 74 more
--------------------------------------------------------------

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