Exception when calling a bpel-process with wait statement
Hello,
I have a simple bpel process definition:
<?xml version="1.0" encoding="UTF-8"?> <bpws:process xmlns:bpws="http://schemas.xmlsoap.org/ws/2004/03/business-process/" xmlns:ns="http://www.kiag.comArtifacts" xmlns:ns0="http://target.namespace" xmlns:tns="http://www.kiag.com" xmlns:xsd="http://www.w3.org/2001/XMLSchema" exitOnStandardFault="yes" name="Starter" suppressJoinFailure="no" targetNamespace="http://www.kiag.com"> <bpws:import importType="http://schemas.xmlsoap.org/wsdl/" location="Starter.wsdl" namespace="http://www.kiag.com"/> <bpws:import importType="http://www.w3.org/2001/XMLSchema" location="bundleentry://288/cache/www.w3.org/2001/XMLSchema.xsd" namespace="http://www.w3.org/2001/XMLSchema"/> <bpws:partnerLinks> <bpws:partnerLink myRole="StarterProvider" name="client" partnerLinkType="tns:Starter"/> </bpws:partnerLinks> <bpws:variables> <bpws:variable messageType="tns:StarterRequestMessage" name="input"/> <bpws:variable messageType="tns:StarterResponseMessage" name="output"/> </bpws:variables> <bpws:sequence name="main"> <bpws:receive createInstance="yes" name="receiveInput" operation="process" partnerLink="client" portType="tns:Starter" variable="input"/> <bpws:assign name="Assign" validate="no"> <bpws:copy> <bpws:from> <bpws:literal>Hello</bpws:literal> </bpws:from> <bpws:to part="response" variable="output"> <bpws:query queryLanguage="http://www.w3.org/TR/1999/REC-xpath-19991116"> <![CDATA[/tns:result]]> </bpws:query> </bpws:to> </bpws:copy> </bpws:assign> <bpws:wait> <bpws:for><![CDATA['PT20S']]></bpws:for> </bpws:wait> <bpws:reply name="replyOutput" operation="process" partnerLink="client" portType="tns:Starter" variable="output"/> </bpws:sequence> </bpws:process>
This process contains a receive with a reply and I instantiate the output variable 'output' with "Hello". There is a wait statement between assign and reply waiting 20 seconds.
I created this process with the bpel designer. I can deploy this definition and I can start this process calling the Starter webservice. But then an exception is thrown in the applicarion server:
22:44:22,057 ERROR [StartListener] could not start process instance java.lang.IllegalAccessException: Class org.hibernate.proxy.pojo.javassist.JavassistLazyInitializer can not access a member of class org.jbpm.bpel.sublang.def.Snippet with modifiers "public" at sun.reflect.Reflection.ensureMemberAccess(Reflection.java:65) at java.lang.reflect.Method.invoke(Method.java:578) at org.hibernate.proxy.pojo.javassist.JavassistLazyInitializer.invoke(JavassistLazyInitializer.java:205) at org.jbpm.bpel.sublang.def.Expression_$$_javassist_94.getText(Expression_$$_javassist_94.java) at org.jbpm.bpel.alarm.Alarm.toString(Alarm.java:145) at java.lang.String.valueOf(String.java:2615) at java.lang.StringBuffer.append(StringBuffer.java:220) at org.jbpm.bpel.alarm.Alarm.createTimer(Alarm.java:93) 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:205) at org.jbpm.bpel.alarm.Alarm_$$_javassist_1.createTimer(Alarm_$$_javassist_1.java) at org.jbpm.bpel.def.Wait.execute(Wait.java:46) at org.jbpm.bpel.def.Activity.enter(Activity.java:101) at org.jbpm.graph.def.Transition.take(Transition.java:119) at org.jbpm.graph.def.Node.leave(Node.java:383) at org.jbpm.bpel.def.Activity.leave(Activity.java:171) at org.jbpm.bpel.def.Assign.execute(Assign.java:55) at org.jbpm.bpel.def.Activity.enter(Activity.java:101) at org.jbpm.graph.def.Transition.take(Transition.java:119) at org.jbpm.graph.def.Node.leave(Node.java:383) at org.jbpm.bpel.def.Activity.leave(Activity.java:171) at org.jbpm.bpel.def.ProcessInstanceStarter.visit(ProcessInstanceStarter.java:57) at org.jbpm.bpel.def.Receive.accept(Receive.java:82) 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:205) at org.jbpm.bpel.def.Receive_$$_javassist_30.accept(Receive_$$_javassist_30.java) at org.jbpm.bpel.def.ProcessInstanceStarter.visit(ProcessInstanceStarter.java:97) at org.jbpm.bpel.def.Sequence.accept(Sequence.java:105) 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:205) at org.jbpm.bpel.def.Activity_$$_javassist_11.accept(Activity_$$_javassist_11.java) at org.jbpm.bpel.def.ProcessInstanceStarter.visit(ProcessInstanceStarter.java:43) at org.jbpm.bpel.def.BpelDefinition.messageReceived(BpelDefinition.java:109) at org.jbpm.bpel.integration.jms.StartListener.onMessage(StartListener.java:115) at org.jboss.mq.SpyMessageConsumer.run(SpyMessageConsumer.java:696) at java.lang.Thread.run(Thread.java:595)
I do not know why this wait statement causes this exception.
A second question: I have changed the bpel process several times and have
deployed the definition each time. Is it necessary to restart the application server each time?
I have recognized that the changes have not taken effect after the deployment. The behaviour was different only after an additional restart of the application server .
My environment: jbpm-bpel-1.1.Beta2.zip
Many thanks in advance,
Frank