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taskClient.complete EXCEPTION

created by gigazhang in jBPM Development - View the full discussion

when call

taskClient.complete(taskId, userId, contentData, operationHandler);

throwing some EXCEPTION:

what's wrong with it?

2012-06-19 17:58:40,617 WARN [org.apache.mina.filter.logging.LoggingFilter] - <EXCEPTION :>

org.apache.mina.filter.codec.ProtocolEncoderException: java.lang.NullPointerException

at org.apache.mina.filter.codec.ProtocolCodecFilter.filterWrite(ProtocolCodecFilter.java:355)

at org.apache.mina.core.filterchain.DefaultIoFilterChain.callPreviousFilterWrite(DefaultIoFilterChain.java:509)

at org.apache.mina.core.filterchain.DefaultIoFilterChain.access$1400(DefaultIoFilterChain.java:46)

at org.apache.mina.core.filterchain.DefaultIoFilterChain$EntryImpl$1.filterWrite(DefaultIoFilterChain.java:808)

at org.apache.mina.core.filterchain.DefaultIoFilterChain$TailFilter.filterWrite(DefaultIoFilterChain.java:734)

at org.apache.mina.core.filterchain.DefaultIoFilterChain.callPreviousFilterWrite(DefaultIoFilterChain.java:509)

at org.apache.mina.core.filterchain.DefaultIoFilterChain.fireFilterWrite(DefaultIoFilterChain.java:501)

at org.apache.mina.core.session.AbstractIoSession.write(AbstractIoSession.java:490)

at org.apache.mina.core.session.AbstractIoSession.write(AbstractIoSession.java:435)

at org.jbpm.task.service.mina.MinaSessionWriter.write(MinaSessionWriter.java:31)

at org.jbpm.task.service.TaskServerHandler.messageReceived(TaskServerHandler.java:134)

at org.jbpm.task.service.mina.MinaTaskServerHandler.messageReceived(MinaTaskServerHandler.java:41)

at org.apache.mina.core.filterchain.DefaultIoFilterChain$TailFilter.messageReceived(DefaultIoFilterChain.java:71

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:7

96)

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:7

96)

at org.apache.mina.filter.logging.LoggingFilter.messageReceived(LoggingFilter.java:177)

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:7

96)

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)

Caused by: java.lang.NullPointerException

at java.io.ObjectOutputStream$BlockDataOutputStream.getUTFLength(ObjectOutputStream.java:2116)

at java.io.ObjectOutputStream$BlockDataOutputStream.writeUTF(ObjectOutputStream.java:1987)

at java.io.ObjectOutputStream.writeUTF(ObjectOutputStream.java:865)

at org.jbpm.task.I18NText.writeExternal(I18NText.java:53)

at org.jbpm.task.utils.CollectionUtils.writeI18NTextList(CollectionUtils.java:235)

at org.jbpm.task.Task.writeExternal(Task.java:92)

at java.io.ObjectOutputStream.writeExternalData(ObjectOutputStream.java:1443)

at java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java:1414)

at java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1174)

at java.io.ObjectOutputStream.writeArray(ObjectOutputStream.java:1362)

at java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1170)

at java.io.ObjectOutputStream.defaultWriteFields(ObjectOutputStream.java:1528)

at java.io.ObjectOutputStream.writeSerialData(ObjectOutputStream.java:1493)

at java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java:1416)

at java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1174)

at java.io.ObjectOutputStream.defaultWriteFields(ObjectOutputStream.java:1528)

at java.io.ObjectOutputStream.writeSerialData(ObjectOutputStream.java:1493)

at java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java:1416)

at java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1174)

at java.io.ObjectOutputStream.writeObject(ObjectOutputStream.java:346)

at org.apache.mina.core.buffer.AbstractIoBuffer.putObject(AbstractIoBuffer.java:2011)

at org.apache.mina.filter.codec.serialization.ObjectSerializationEncoder.encode(ObjectSerializationEncoder.java:

80)

at org.apache.mina.filter.codec.ProtocolCodecFilter.filterWrite(ProtocolCodecFilter.java:322)

... 36 more