jbpm5.3 task complete NullPointerException GetCompletedTaskResponseHandler.execute(AsyncGenericHTWorkItemHandler.java:241)
the bpmn file:
<?xml version="1.0" encoding="UTF-8"?>
<definitions id="Definition"
targetNamespace="http://www.jboss.org/drools"
typeLanguage="http://www.java.com/javaTypes"
expressionLanguage="http://www.mvel.org/2.0"
xmlns="http://www.omg.org/spec/BPMN/20100524/MODEL"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://www.omg.org/spec/BPMN/20100524/MODEL BPMN20.xsd"
xmlns:g="http://www.jboss.org/drools/flow/gpd"
xmlns:bpmndi="http://www.omg.org/spec/BPMN/20100524/DI"
xmlns:dc="http://www.omg.org/spec/DD/20100524/DC"
xmlns:di="http://www.omg.org/spec/DD/20100524/DI"
xmlns:tns="http://www.jboss.org/drools">
<process processType="Private" isExecutable="true" id="com.baison.shop2" name="leave" tns:packageName="baison" >
<!-- nodes -->
<startEvent id="_1" name="Start" />
<userTask id="_2" name="Order" >
<ioSpecification>
<dataInput id="_2_CommentInput" name="Comment" />
<dataInput id="_2_TaskNameInput" name="TaskName" />
<inputSet>
<dataInputRefs>_2_CommentInput</dataInputRefs>
<dataInputRefs>_2_TaskNameInput</dataInputRefs>
</inputSet>
<outputSet>
</outputSet>
</ioSpecification>
<dataInputAssociation>
<targetRef>_2_CommentInput</targetRef>
<assignment>
<from xsi:type="tFormalExpression">Order comment</from>
<to xsi:type="tFormalExpression">_2_CommentInput</to>
</assignment>
</dataInputAssociation>
<dataInputAssociation>
<targetRef>_2_TaskNameInput</targetRef>
<assignment>
<from xsi:type="tFormalExpression">Order</from>
<to xsi:type="tFormalExpression">_2_TaskNameInput</to>
</assignment>
</dataInputAssociation>
<potentialOwner>
<resourceAssignmentExpression>
<formalExpression>chenjia</formalExpression>
</resourceAssignmentExpression>
</potentialOwner>
</userTask>
<userTask id="_3" name="Approval" >
<ioSpecification>
<dataInput id="_3_CommentInput" name="Comment" />
<dataInput id="_3_TaskNameInput" name="TaskName" />
<inputSet>
<dataInputRefs>_3_CommentInput</dataInputRefs>
<dataInputRefs>_3_TaskNameInput</dataInputRefs>
</inputSet>
<outputSet>
</outputSet>
</ioSpecification>
<dataInputAssociation>
<targetRef>_3_CommentInput</targetRef>
<assignment>
<from xsi:type="tFormalExpression">Approval comment</from>
<to xsi:type="tFormalExpression">_3_CommentInput</to>
</assignment>
</dataInputAssociation>
<dataInputAssociation>
<targetRef>_3_TaskNameInput</targetRef>
<assignment>
<from xsi:type="tFormalExpression">Approval</from>
<to xsi:type="tFormalExpression">_3_TaskNameInput</to>
</assignment>
</dataInputAssociation>
<potentialOwner>
<resourceAssignmentExpression>
<formalExpression>zhangsan</formalExpression>
</resourceAssignmentExpression>
</potentialOwner>
</userTask>
<endEvent id="_4" name="End" >
<terminateEventDefinition/>
</endEvent>
<!-- connections -->
<sequenceFlow id="_1-_2" sourceRef="_1" targetRef="_2" />
<sequenceFlow id="_2-_3" sourceRef="_2" targetRef="_3" />
<sequenceFlow id="_3-_4" sourceRef="_3" targetRef="_4" />
</process>
<bpmndi:BPMNDiagram>
<bpmndi:BPMNPlane bpmnElement="com.baison.shop2" >
<bpmndi:BPMNShape bpmnElement="_1" >
<dc:Bounds x="100" y="100" width="48" height="48" />
</bpmndi:BPMNShape>
<bpmndi:BPMNShape bpmnElement="_2" >
<dc:Bounds x="244" y="107" width="100" height="48" />
</bpmndi:BPMNShape>
<bpmndi:BPMNShape bpmnElement="_3" >
<dc:Bounds x="421" y="108" width="100" height="48" />
</bpmndi:BPMNShape>
<bpmndi:BPMNShape bpmnElement="_4" >
<dc:Bounds x="647" y="110" width="48" height="48" />
</bpmndi:BPMNShape>
<bpmndi:BPMNEdge bpmnElement="_1-_2" >
<di:waypoint x="124" y="124" />
<di:waypoint x="294" y="131" />
</bpmndi:BPMNEdge>
<bpmndi:BPMNEdge bpmnElement="_2-_3" >
<di:waypoint x="294" y="131" />
<di:waypoint x="471" y="132" />
</bpmndi:BPMNEdge>
<bpmndi:BPMNEdge bpmnElement="_3-_4" >
<di:waypoint x="471" y="132" />
<di:waypoint x="671" y="134" />
</bpmndi:BPMNEdge>
</bpmndi:BPMNPlane>
</bpmndi:BPMNDiagram>
</definitions>
ContentData contentData = null;
if (data != null) {
ByteArrayOutputStream bos = new ByteArrayOutputStream();
ObjectOutputStream out = null;
try {
out = new ObjectOutputStream(bos);
out.writeObject(data);
contentData = new ContentData();
System.out.println(bos.toByteArray());
contentData.setContent(bos.toByteArray());
contentData.setAccessType(AccessType.Inline);
out.close();
out = null;
bos.close();
bos = null;
} catch (IOException e) {
e.printStackTrace();
}
}
taskClient.complete(taskId, userId, contentData, operationHandler);
when I complete the task,there throws exception:
2012-06-27 17:34:46,634 INFO [org.apache.mina.filter.logging.LoggingFilter] - <SENT: HeapBuffer[pos=0 lim=0 cap=0: empty]>
java.lang.NullPointerException
at org.jbpm.process.workitem.wsht.AsyncGenericHTWorkItemHandler$GetCompletedTaskResponseHandler.execute(AsyncGenericHTWorkItemHandler.java:241)
at org.jbpm.task.service.TaskClientHandler.messageReceived(TaskClientHandler.java:81)
at org.jbpm.task.service.mina.MinaTaskClientHandler.messageReceived(MinaTaskClientHandler.java:47)
at org.apache.mina.core.filterchain.DefaultIoFilterChain$TailFilter.messageReceived(DefaultIoFilterChain.java:716)
at org.apache.mina.core.filterchain.DefaultIoFilterChain.callNextMessageReceived(DefaultIoFilterChain.java:434)
at org.apache.mina.core.filterchain.DefaultIoFilterChain.access$1200(DefaultIoFilterChain.java:46)
at org.apache.mina.core.filterchain.DefaultIoFilterChain$EntryImpl$1.messageReceived(DefaultIoFilterChain.java:796)
at org.apache.mina.filter.codec.ProtocolCodecFilter$ProtocolDecoderOutputImpl.flush(ProtocolCodecFilter.java:427)
at org.apache.mina.filter.codec.ProtocolCodecFilter.messageReceived(ProtocolCodecFilter.java:245)
at org.apache.mina.core.filterchain.DefaultIoFilterChain.callNextMessageReceived(DefaultIoFilterChain.java:434)
at org.apache.mina.core.filterchain.DefaultIoFilterChain.access$1200(DefaultIoFilterChain.java:46)
at org.apache.mina.core.filterchain.DefaultIoFilterChain$EntryImpl$1.messageReceived(DefaultIoFilterChain.java:796)
at org.apache.mina.core.filterchain.IoFilterAdapter.messageReceived(IoFilterAdapter.java:119)
at org.apache.mina.core.filterchain.DefaultIoFilterChain.callNextMessageReceived(DefaultIoFilterChain.java:434)
at org.apache.mina.core.filterchain.DefaultIoFilterChain.fireMessageReceived(DefaultIoFilterChain.java:426)
at org.apache.mina.core.polling.AbstractPollingIoProcessor.read(AbstractPollingIoProcessor.java:692)
at org.apache.mina.core.polling.AbstractPollingIoProcessor.process(AbstractPollingIoProcessor.java:645)
at org.apache.mina.core.polling.AbstractPollingIoProcessor.process(AbstractPollingIoProcessor.java:634)
at org.apache.mina.core.polling.AbstractPollingIoProcessor.access$400(AbstractPollingIoProcessor.java:66)
at org.apache.mina.core.polling.AbstractPollingIoProcessor$Processor.run(AbstractPollingIoProcessor.java:1078)
at org.apache.mina.util.NamePreservingRunnable.run(NamePreservingRunnable.java:64)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1110)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:603)
at java.lang.Thread.run(Thread.java:722)