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Re: Exception retrieving task
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created by <a href="https://community.jboss.org/people/jnorris">jnorris</a> in <i>jBPM</i> - <a href="https://community.jboss.org/message/744275#744275">View the full discussion</a>
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<div class="jive-rendered-content"><p>Hi All,</p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>I'm pretty sure the issues with getting a task are due to the I18NText null values.  When a process is started a task is created.  There are also 2 rows created in the I18NText table.  The first row has a value for TASK_DESCRIPTIONS_ID and nulls for TASK_SUBJECTS_ID and TASK_NAMES_ID.  The second row has a value for TASK_SUBJECTS_ID and nulls for TASK_DESCRIPTIONS_ID and TASK_NAMES_ID.  I would think only one row would be created for a task.  Does anyone have a clue what's  going on?</p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>This is a critical issue for me and I have missed a deadline already because of it.</p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>I'd appreciate any help in resolving this matter.</p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>BTW, getting a list of tasks for a user works fine.  Any other methods such as getTask, claimTask, etc. all cause a null pointer exception to be thrown similar to the one included below:</p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>Jim</p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>     [java] Hibernate: select subjects0_.Task_Subjects_Id as Task4_1_, subjects0_.id as id1_, subjects0_.id as id7_0_, subjects0_.language as language7_0_, subjects0_.text as text7_0_ from I18NText su</p><p>bjects0_ where subjects0_.Task_Subjects_Id=?</p><p>     [java] org.apache.mina.filter.codec.ProtocolEncoderException: java.lang.NullPointerException</p><p>     [java]     at org.apache.mina.filter.codec.ProtocolCodecFilter.filterWrite(ProtocolCodecFilter.java:355)</p><p>     [java]     at org.apache.mina.core.filterchain.DefaultIoFilterChain.callPreviousFilterWrite(DefaultIoFilterChain.java:509)</p><p>     [java]     at org.apache.mina.core.filterchain.DefaultIoFilterChain.access$1400(DefaultIoFilterChain.java:46)</p><p>     [java]     at org.apache.mina.core.filterchain.DefaultIoFilterChain$EntryImpl$1.filterWrite(DefaultIoFilterChain.java:808)</p><p>     [java]     at org.apache.mina.core.filterchain.DefaultIoFilterChain$TailFilter.filterWrite(DefaultIoFilterChain.java:734)</p><p>     [java]     at org.apache.mina.core.filterchain.DefaultIoFilterChain.callPreviousFilterWrite(DefaultIoFilterChain.java:509)</p><p>     [java]     at org.apache.mina.core.filterchain.DefaultIoFilterChain.fireFilterWrite(DefaultIoFilterChain.java:501)</p><p>     [java]     at org.apache.mina.core.session.AbstractIoSession.write(AbstractIoSession.java:490)</p><p>     [java]     at org.apache.mina.core.session.AbstractIoSession.write(AbstractIoSession.java:435)</p><p>     [java]     at org.jbpm.task.service.mina.MinaSessionWriter.write(MinaSessionWriter.java:31)</p><p>     [java]     at org.jbpm.task.service.TaskServerHandler.messageReceived(TaskServerHandler.java:134)</p><p>     [java]     at org.jbpm.task.service.mina.MinaTaskServerHandler.messageReceived(MinaTaskServerHandler.java:41)</p><p>     [java]     at org.apache.mina.core.filterchain.DefaultIoFilterChain$TailFilter.messageReceived(DefaultIoFilterChain.java:716)</p><p>     [java]     at org.apache.mina.core.filterchain.DefaultIoFilterChain.callNextMessageReceived(DefaultIoFilterChain.java:434)</p><p>     [java]     at org.apache.mina.core.filterchain.DefaultIoFilterChain.access$1200(DefaultIoFilterChain.java:46)</p><p>     [java]     at org.apache.mina.core.filterchain.DefaultIoFilterChain$EntryImpl$1.messageReceived(DefaultIoFilterChain.java:796)</p><p>     [java]     at org.apache.mina.filter.codec.ProtocolCodecFilter$ProtocolDecoderOutputImpl.flush(ProtocolCodecFilter.java:427)</p><p>     [java]     at org.apache.mina.filter.codec.ProtocolCodecFilter.messageReceived(ProtocolCodecFilter.java:245)</p><p>     [java]     at org.apache.mina.core.filterchain.DefaultIoFilterChain.callNextMessageReceived(DefaultIoFilterChain.java:434)</p><p>     [java]     at org.apache.mina.core.filterchain.DefaultIoFilterChain.access$1200(DefaultIoFilterChain.java:46)</p><p>     [java]     at org.apache.mina.core.filterchain.DefaultIoFilterChain$EntryImpl$1.messageReceived(DefaultIoFilterChain.java:796)</p><p>     [java]     at org.apache.mina.filter.logging.LoggingFilter.messageReceived(LoggingFilter.java:177)</p><p>     [java]     at org.apache.mina.core.filterchain.DefaultIoFilterChain.callNextMessageReceived(DefaultIoFilterChain.java:434)</p><p>     [java]     at org.apache.mina.core.filterchain.DefaultIoFilterChain.access$1200(DefaultIoFilterChain.java:46)</p><p>     [java]     at org.apache.mina.core.filterchain.DefaultIoFilterChain$EntryImpl$1.messageReceived(DefaultIoFilterChain.java:796)</p><p>     [java]     at org.apache.mina.core.filterchain.IoFilterAdapter.messageReceived(IoFilterAdapter.java:119)</p><p>     [java]     at org.apache.mina.core.filterchain.DefaultIoFilterChain.callNextMessageReceived(DefaultIoFilterChain.java:434)</p><p>     [java]     at org.apache.mina.core.filterchain.DefaultIoFilterChain.fireMessageReceived(DefaultIoFilterChain.java:426)</p><p>     [java]     at org.apache.mina.core.polling.AbstractPollingIoProcessor.read(AbstractPollingIoProcessor.java:692)</p><p>     [java]     at org.apache.mina.core.polling.AbstractPollingIoProcessor.process(AbstractPollingIoProcessor.java:645)</p><p>     [java]     at org.apache.mina.core.polling.AbstractPollingIoProcessor.process(AbstractPollingIoProcessor.java:634)</p><p>     [java]     at org.apache.mina.core.polling.AbstractPollingIoProcessor.access$400(AbstractPollingIoProcessor.java:66)</p><p>     [java]     at org.apache.mina.core.polling.AbstractPollingIoProcessor$Processor.run(AbstractPollingIoProcessor.java:1078)</p><p>     [java]     at org.apache.mina.util.NamePreservingRunnable.run(NamePreservingRunnable.java:64)</p><p>     [java]     at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:886)</p><p>     [java]     at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:908)</p><p>     [java]     at java.lang.Thread.run(Thread.java:662)</p><p>     [java] Caused by: java.lang.NullPointerException</p><p>     [java]     at java.io.ObjectOutputStream$BlockDataOutputStream.getUTFLength(ObjectOutputStream.java:2106)</p><p>     [java]     at java.io.ObjectOutputStream$BlockDataOutputStream.writeUTF(ObjectOutputStream.java:1977)</p><p>     [java]     at java.io.ObjectOutputStream.writeUTF(ObjectOutputStream.java:849)</p><p>     [java]     at org.jbpm.task.I18NText.writeExternal(I18NText.java:53)</p><p>     [java]     at org.jbpm.task.utils.CollectionUtils.writeI18NTextList(CollectionUtils.java:235)</p><p>     [java]     at org.jbpm.task.Task.writeExternal(Task.java:92)</p><p>     [java]     at java.io.ObjectOutputStream.writeExternalData(ObjectOutputStream.java:1429)</p><p>     [java]     at java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java:1398)</p><p>     [java]     at java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1158)</p><p>     [java]     at java.io.ObjectOutputStream.writeArray(ObjectOutputStream.java:1346)</p><p>     [java]     at java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1154)</p><p>     [java]     at java.io.ObjectOutputStream.defaultWriteFields(ObjectOutputStream.java:1518)</p><p>     [java]     at java.io.ObjectOutputStream.writeSerialData(ObjectOutputStream.java:1483)</p><p>     [java]     at java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java:1400)</p><p>     [java]     at java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1158)</p><p>     [java]     at java.io.ObjectOutputStream.defaultWriteFields(ObjectOutputStream.java:1518)</p><p>     [java]     at java.io.ObjectOutputStream.writeSerialData(ObjectOutputStream.java:1483)</p><p>     [java]     at java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java:1400)</p><p>     [java]     at java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1158)</p><p>     [java]     at java.io.ObjectOutputStream.writeObject(ObjectOutputStream.java:330)</p><p>     [java]     at org.apache.mina.core.buffer.AbstractIoBuffer.putObject(AbstractIoBuffer.java:2011)</p><p>     [java]     at org.apache.mina.filter.codec.serialization.ObjectSerializationEncoder.encode(ObjectSerializationEncoder.java:80)</p><p>     [java]     at org.apache.mina.filter.codec.ProtocolCodecFilter.filterWrite(ProtocolCodecFilter.java:322)</p><p>     [java]     ... 36 more</p></div>
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