José Tomás Tocino [https://community.jboss.org/people/theom3ga] created the discussion "jBPM Console Server can't find WorkItem Handler Implementation" To view the discussion, visit: https://community.jboss.org/message/799582#799582 -------------------------------------------------------------- Hi there. I'm having a problem trying to run a process that has a Work Item. The server can't find the implementation for the Work Item Handler. These are the steps I follow. First I create the work item in drools-guvnor, it is called 'Activo1', and it's defined as follows: import org.drools.process.core.datatype.impl.type.ObjectDataType; import org.drools.process.core.datatype.impl.type.StringDataType; [     [     "name" : "Activo1",     "parameters" : [               "MyFirstParam" : new StringDataType(),     ],     "results" : [         "Result" : new StringDataType()     ],     "displayName" : "My Task",     "icon" : "",   ] ] Then, I create a simple process with a start event, the work item, and the end event. I build a snapshot of the package and the process appears in the list of available processes in the jbpm-console. Next, I edit the conf/META-INF/CustomWorkItemHandlers.conf so it looks like this: [   "Log": new org.jbpm.process.instance.impl.demo.SystemOutWorkItemHandler(),   "Activo1": new defaultPackage.Activo1() ] I use ant stop.demo, and then ant start.demo, then I check in the console server war that the CustomWorkItemHandlers file is properly updated. So far it's ok. For the implementation, I created a folder called 'defaultPackage' and, inside, I create an Activo1.java file with the following contents: package defaultPackage; import org.drools.runtime.process.*; public class Activo1 implements WorkItemHandler{     public void executeWorkItem(WorkItem workItem, WorkItemManager manager) {         System.out.println("GOOD BYE WORLD");         manager.completeWorkItem(workItem.getId(), null);     }     public void abortWorkItem (WorkItem workItem, WorkItemManager manager) {         // Nothing     } } In order to compile it, I use javac -cp "runtime/lib/*" defaultPackage/Activo1.java And in order to create the JAR file I use this: jar cfe Activo1.jar defaultPackage.Activo1 defaultPackage The previous two commands may be the part that's wrong, because I'm an absolute java noob. I copy the JAR file in all the 'lib' folders I come across, namely $installer/lib, $installer/runtime/lib and $installer/jboss[...]/standalone/lib. When I launch the process in the jbpm console, I get the following error in the SERVER.LOG file: Could not commit session: org.jbpm.workflow.instance.WorkflowRuntimeException: [defaultPackage.Proceso1:4 - My Task:2] -- Could not find work item handler for Activo1 HOWEVER, If I change the CustomWorkItemHandlers.conf file so it looks like this: [   "Log": new org.jbpm.process.instance.impl.demo.SystemOutWorkItemHandler(),   "Activo1": new org.jbpm.process.instance.impl.demo.SystemOutWorkItemHandler() ] and then I launch the process, the default SystemOut work item handler works OK and I get the following in the LOG file: [stdout] (http-localhost-127.0.0.1-8080-1) Executing work item WorkItem 5 [name=Activo1, state=0, processInstanceId=5, parameters{TaskName=Activo1}] So the work item definition and the model definition seem to be OK. The problem seems to be in the place or the way the JAR was generated. Please help! -------------------------------------------------------------- Reply to this message by going to Community [https://community.jboss.org/message/799582#799582] Start a new discussion in jBPM at Community [https://community.jboss.org/choose-container!input.jspa?contentType=1&...]