[jboss-dev-forums] [jBPM Development] - jbpm5.3 task complete NullPointerException GetCompletedTaskResponseHandler.execute(AsyncGenericHTWorkItemHandler.java:241)

[gigazhang]

gigazhang [https://community.jboss.org/people/gigazhang] created the discussion

"jbpm5.3 task complete NullPointerException GetCompletedTaskResponseHandler.execute(AsyncGenericHTWorkItemHandler.java:241)"

To view the discussion, visit: https://community.jboss.org/message/744483#744483

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+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)
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