gigazhang [https://community.jboss.org/people/gigazhang] created the discussion "taskClient.complete EXCEPTION" To view the discussion, visit: https://community.jboss.org/message/742629#742629 -------------------------------------------------------------- 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 6)         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 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 6)         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) -------------------------------------------------------------- Reply to this message by going to Community [https://community.jboss.org/message/742629#742629] Start a new discussion in jBPM Development at Community [https://community.jboss.org/choose-container!input.jspa?contentType=1&...]