User development, A new message was posted in the thread "Deploying process Definition": http://community.jboss.org/message/520302#520302 Author : Sakthivelmurugan KG Profile : http://community.jboss.org/people/Sakthivel_kg Message: -------------------------------------------------------------- Hi,   I am  new to JBPM. I am using JBPM 3.2.3.  I am getting the following exception while creating a new process instance. I have deployed the process definition only for the first time as it is putting an entry everytime in JBPM_PROCESSDEFINITION table.   org.hibernate.HibernateException: null index column for collection: org.jbpm.graph.def.ProcessDefinition.definitions   at org.hibernate.persister.collection.AbstractCollectionPersister.readIndex(AbstractCollectionPersister.java:710)         at org.hibernate.collection.PersistentMap.readFrom(PersistentMap.java:258)         at org.hibernate.loader.Loader.readCollectionElement(Loader.java:1008)         at org.hibernate.loader.Loader.readCollectionElements(Loader.java:646)         at org.hibernate.loader.Loader.getRowFromResultSet(Loader.java:591)         at org.hibernate.loader.Loader.doQuery(Loader.java:701)         at org.hibernate.loader.Loader.doQueryAndInitializeNonLazyCollections(Loader.java:236)         at org.hibernate.loader.Loader.loadCollection(Loader.java:1994)         at org.hibernate.loader.collection.CollectionLoader.initialize(CollectionLoader.java:36)         at org.hibernate.persister.collection.AbstractCollectionPersister.initialize(AbstractCollectionPersister.java:565)         at org.hibernate.event.def.DefaultInitializeCollectionEventListener.onInitializeCollection(DefaultInitializeCollectionEventListener.java:60)         at org.hibernate.impl.SessionImpl.initializeCollection(SessionImpl.java:1716)         at org.hibernate.collection.AbstractPersistentCollection.initialize(AbstractPersistentCollection.java:344)         at org.hibernate.collection.AbstractPersistentCollection.read(AbstractPersistentCollection.java:86)         at org.hibernate.collection.PersistentMap.values(PersistentMap.java:234)         at org.jbpm.graph.exe.ProcessInstance.<init>(ProcessInstance.java:145)         at org.jbpm.graph.exe.ProcessInstance.<init>(ProcessInstance.java:92)         at in.co.nmsworks.ordermanagement.process.ProcessFlow.startProcess(ProcessFlow.java:77)         at com.cygnet.nms.webclient.ordermgmt.action.OrderSubmitAction.addOrder(OrderSubmitAction.java:129)         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.apache.struts.actions.DispatchAction.dispatchMethod(DispatchAction.java:280)         at org.apache.struts.actions.DispatchAction.execute(DispatchAction.java:216)         at org.apache.struts.action.RequestProcessor.processActionPerform(RequestProcessor.java:484)         at org.apache.struts.action.RequestProcessor.process(RequestProcessor.java:274)         at org.apache.struts.action.ActionServlet.process(ActionServlet.java:1482)         at org.apache.struts.action.ActionServlet.doGet(ActionServlet.java:507)         at javax.servlet.http.HttpServlet.service(HttpServlet.java:740)         at javax.servlet.http.HttpServlet.service(HttpServlet.java:853)         at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:247)         at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:193)         at com.adventnet.nms.webclient.login.AuthenticationFilter.doFilter(AuthenticationFilter.java:114)         at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:213)         at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:193)         at com.adventnet.nms.webclient.i18n.EncodingFilter.doFilter(EncodingFilter.java:70)         at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:213)         at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:193)         at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:256)         at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:643)         at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:480)         at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:995)         at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:191)         at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:643)         at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:480)         at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:995)         at org.apache.catalina.core.StandardContext.invoke(StandardContext.java:2416)         at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:180)         at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:643)         at org.apache.catalina.valves.ErrorDispatcherValve.invoke(ErrorDispatcherValve.java:171)         at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:641)         at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:172)         at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:641)         at org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:577)         at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:641)         at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:480)         at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:995)         at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:174)         at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:643)         at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:480)         at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:995)         at org.apache.ajp.tomcat4.Ajp13Processor.process(Ajp13Processor.java:466)         at org.apache.ajp.tomcat4.Ajp13Processor.run(Ajp13Processor.java:585)         at java.lang.Thread.run(Thread.java:595)     Here is the code i am using to get Jbpm context, Jbpmconfiguration, ProcessDefinition:          JbpmConfiguration configuration = JbpmConfiguration.parseResource("jbpm.cfg.xml");         //configuration.createSchema();         JbpmContext context = configuration.getCurrentJbpmContext();         if(context == null) {             context = configuration.createJbpmContext();         }         ProcessDefinition definition = null;         GraphSession session = context.getGraphSession();         definition = session.loadProcessDefinition(1);         System.out.println(" Process Definition reference in JBPM Server :: " + definition);         if(definition ==  null) {             definition = ProcessDefinition.parseXmlResource("processdefinition.xml");             context.deployProcessDefinition(definition);         }     Here is the code i am using to create a new process instance: // Code to get process definition goes here     // Creating a process instance ProcessInstance instance = new ProcessInstance(definition);   I am able to see the process definition reference in my logs. But not able to understand why the exception has occured and process instance is not created?   Anyone please help me on this as it is very urgent   Thanks in advance.   Regards, Sakthi -------------------------------------------------------------- To reply to this message visit the message page: http://community.jboss.org/message/520302#520302