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Human Task Service transactions fail
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created by <a href="https://community.jboss.org/people/gkalabin">Grigory Kalabin</a> in <i>jBPM</i> - <a href="https://community.jboss.org/message/762559#762559">View the full discussion</a>
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<div class="jive-rendered-content"><p>Hi everybody!</p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p><span style="color: #555555; font-family: 'Lucida Sans', 'Lucida Sans Unicode', 'Lucida Grande', Verdana, Arial, Helvetica, sans-serif; font-size: 12px; background-color: #eef4f9;">I'm using jBPM 5.3.0.Final (except jbpm-human-task which version is 5.3.0.CR1, because something is wrong with my pom.xml or maven repo) and JBoss 7.1.1.</span></p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p><span style="color: #555555; font-family: 'Lucida Sans', 'Lucida Sans Unicode', 'Lucida Grande', Verdana, Arial, Helvetica, sans-serif; font-size: 12px; background-color: #eef4f9;">I'm trying to run jbpm with human task service.</span></p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p><span style="color: #555555; font-family: 'Lucida Sans', 'Lucida Sans Unicode', 'Lucida Grande', Verdana, Arial, Helvetica, sans-serif; font-size: 12px; background-color: #eef4f9;">When I start processes without human tasks everything works fine. But when I try to run process with human task I get the following exception (see full error log in attachments):</span></p><p><span style="color: #555555; font-family: 'Lucida Sans', 'Lucida Sans Unicode', 'Lucida Grande', Verdana, Arial, Helvetica, sans-serif; font-size: 12px; background-color: #eef4f9;"><br/></span></p><pre class="jive-pre"><code class="jive-code">20:04:37,710 ERROR [stderr] (NioProcessor-4) Caused by: java.lang.NullPointerException
20:04:37,715 ERROR [stderr] (NioProcessor-4)    at org.jbpm.task.service.persistence.TaskJTATransactionManager.getStatus(TaskJTATransactionManager.java:70)
20:04:37,726 ERROR [stderr] (NioProcessor-4)    at org.jbpm.task.service.persistence.TaskJTATransactionManager.ownsTransaction(TaskJTATransactionManager.java:28)
20:04:37,737 ERROR [stderr] (NioProcessor-4)    at org.jbpm.task.service.persistence.TaskPersistenceManager.beginTransaction(TaskPersistenceManager.java:50)
20:04:37,749 ERROR [stderr] (NioProcessor-4)    at org.jbpm.task.service.TaskServiceSession.doOperationInTransaction(TaskServiceSession.java:887)
20:04:37,754 ERROR [stderr] (NioProcessor-4)    ... 28 more
</code></pre><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>I init HumanTaskService and jBPM like:</p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><pre class="jive-pre"><code class="jive-code jive-java">Environment JBPM_ENVIRONMENT = KnowledgeBaseFactory.newEnvironment();
JBPM_ENVIRONMENT.set(EnvironmentName.ENTITY_MANAGER_FACTORY, Persistence.createEntityManagerFactory(<font color="red">"org.jbpm.persistence.jpa"</font>));
JBPM_ENVIRONMENT.set(EnvironmentName.TRANSACTION_MANAGER, TransactionManagerServices.getTransactionManager());
JBPM_ENVIRONMENT.set(EnvironmentName.GLOBALS, <font color="navy"><b>new</b></font> MapGlobalResolver());
 
Properties properties = <font color="navy"><b>new</b></font> Properties();
properties.put(<font color="red">"drools.processInstanceManagerFactory"</font>, <font color="red">"org.jbpm.persistence.processinstance.JPAProcessInstanceManagerFactory"</font>);
properties.put(<font color="red">"drools.processSignalManagerFactory"</font>, <font color="red">"org.jbpm.persistence.processinstance.JPASignalManagerFactory"</font>);
KnowledgeSessionConfiguration JBPM_CONFIG = KnowledgeBaseFactory.newKnowledgeSessionConfiguration(properties);
 
EntityManagerFactory emf = Persistence.createEntityManagerFactory(<font color="red">"org.jbpm.task"</font>);
TaskService taskService = <font color="navy"><b>new</b></font> TaskService(emf, SystemEventListenerFactory.getSystemEventListener());
 
MinaTaskServer taskServer = <font color="navy"><b>new</b></font> MinaTaskServer(taskService);
<font color="darkgreen">// start the server</font>
Thread thread = <font color="navy"><b>new</b></font> Thread(taskServer);
thread.start();
 
TaskClient taskClient = <font color="navy"><b>new</b></font> TaskClient(<font color="navy"><b>new</b></font> MinaTaskClientConnector(<font color="red">"myHtsClient"</font>,
                <font color="navy"><b>new</b></font> MinaTaskClientHandler(SystemEventListenerFactory.getSystemEventListener())));
<font color="navy"><b>if</b></font> (!taskClient.connect(TASK_CLIENT_SERVER_ADDRESS, TASK_CLIENT_SERVER_PORT)) <font color="navy">{</font>
     logger.error(<font color="red">"Could not connect task client"</font>);
<font color="navy">}</font>
 
StatefulKnowledgeSession session = JPAKnowledgeService.newStatefulKnowledgeSession(readKnowledgeBase(), JBPM_CONFIG, JBPM_ENVIRONMENT);
session.getWorkItemManager().registerWorkItemHandler(<font color="red">"Human Task"</font>, <font color="navy"><b>new</b></font> CommandBasedWSHumanTaskHandler(session));
</code></pre><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>And my persistence.xml looks like:</p><p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><pre class="jive-pre"><code class="jive-code jive-xml"><span class="jive-xml-tag"><?xml version="1.0" encoding="UTF-8"?></span>
<span class="jive-xml-tag"><span><persistence version="2.0"
             xmlns="</span><a class="jive-link-external-small" href="http://java.sun.com/xml/ns/persistence" target="_blank">http://java.sun.com/xml/ns/persistence</a><span>"
             xmlns:xsi="</span><a class="jive-link-external-small" href="http://www.w3.org/2001/XMLSchema-instance" target="_blank">http://www.w3.org/2001/XMLSchema-instance</a><span>"
             xsi:schemaLocation="</span><a class="jive-link-external-small" href="http://java.sun.com/xml/ns/persistence" target="_blank">http://java.sun.com/xml/ns/persistence</a><span> </span><a class="jive-link-external-small" href="http://java.sun.com/xml/ns/persistence/persistence_2_0.xsd" target="_blank">http://java.sun.com/xml/ns/persistence/persistence_2_0.xsd</a><span>"></span></span>
 
    <span class="jive-xml-tag"><persistence-unit name="org.jbpm.persistence.jpa" transaction-type="JTA"></span>
        <span class="jive-xml-tag"><provider></span>org.hibernate.ejb.HibernatePersistence<span class="jive-xml-tag"></provider></span>
        <span class="jive-xml-tag"><jta-data-source></span>java:jboss/datasources/jbpmDS<span class="jive-xml-tag"></jta-data-source></span>
        <span class="jive-xml-tag"><mapping-file></span>META-INF/JBPMorm-JPA2.xml<span class="jive-xml-tag"></mapping-file></span>
 
        <span class="jive-xml-tag"><class></span>org.drools.persistence.info.SessionInfo<span class="jive-xml-tag"></class></span>
        <span class="jive-xml-tag"><class></span>org.jbpm.persistence.processinstance.ProcessInstanceInfo<span class="jive-xml-tag"></class></span>
        <span class="jive-xml-tag"><class></span>org.drools.persistence.info.WorkItemInfo<span class="jive-xml-tag"></class></span>
    <span class="jive-xml-tag"></persistence-unit></span>
    <span class="jive-xml-tag"><persistence-unit name="org.jbpm.task"></span>
        <span class="jive-xml-tag"><provider></span>org.hibernate.ejb.HibernatePersistence<span class="jive-xml-tag"></provider></span>
        <span class="jive-xml-tag"><jta-data-source></span>java:jboss/datasources/jbpmDS<span class="jive-xml-tag"></jta-data-source></span>
        <span class="jive-xml-tag"><mapping-file></span>META-INF/Taskorm.xml<span class="jive-xml-tag"></mapping-file></span>
 
        <span class="jive-xml-tag"><class></span>org.jbpm.task.Attachment<span class="jive-xml-tag"></class></span>
        <span class="jive-xml-tag"><class></span>org.jbpm.task.Content<span class="jive-xml-tag"></class></span>
        <span class="jive-xml-tag"><class></span>org.jbpm.task.BooleanExpression<span class="jive-xml-tag"></class></span>
        <span class="jive-xml-tag"><class></span>org.jbpm.task.Comment<span class="jive-xml-tag"></class></span>
        <span class="jive-xml-tag"><class></span>org.jbpm.task.Deadline<span class="jive-xml-tag"></class></span>
        <span class="jive-xml-tag"><class></span>org.jbpm.task.Comment<span class="jive-xml-tag"></class></span>
        <span class="jive-xml-tag"><class></span>org.jbpm.task.Deadline<span class="jive-xml-tag"></class></span>
        <span class="jive-xml-tag"><class></span>org.jbpm.task.Delegation<span class="jive-xml-tag"></class></span>
        <span class="jive-xml-tag"><class></span>org.jbpm.task.Escalation<span class="jive-xml-tag"></class></span>
        <span class="jive-xml-tag"><class></span>org.jbpm.task.Group<span class="jive-xml-tag"></class></span>
        <span class="jive-xml-tag"><class></span>org.jbpm.task.I18NText<span class="jive-xml-tag"></class></span>
        <span class="jive-xml-tag"><class></span>org.jbpm.task.Notification<span class="jive-xml-tag"></class></span>
        <span class="jive-xml-tag"><class></span>org.jbpm.task.EmailNotification<span class="jive-xml-tag"></class></span>
        <span class="jive-xml-tag"><class></span>org.jbpm.task.EmailNotificationHeader<span class="jive-xml-tag"></class></span>
        <span class="jive-xml-tag"><class></span>org.jbpm.task.PeopleAssignments<span class="jive-xml-tag"></class></span>
        <span class="jive-xml-tag"><class></span>org.jbpm.task.Reassignment<span class="jive-xml-tag"></class></span>
        <span class="jive-xml-tag"><class></span>org.jbpm.task.Status<span class="jive-xml-tag"></class></span>
        <span class="jive-xml-tag"><class></span>org.jbpm.task.Task<span class="jive-xml-tag"></class></span>
        <span class="jive-xml-tag"><class></span>org.jbpm.task.TaskData<span class="jive-xml-tag"></class></span>
        <span class="jive-xml-tag"><class></span>org.jbpm.task.SubTasksStrategy<span class="jive-xml-tag"></class></span>
        <span class="jive-xml-tag"><class></span>org.jbpm.task.OnParentAbortAllSubTasksEndStrategy<span class="jive-xml-tag"></class></span>
        <span class="jive-xml-tag"><class></span>org.jbpm.task.OnAllSubTasksEndParentEndStrategy<span class="jive-xml-tag"></class></span>
        <span class="jive-xml-tag"><class></span>org.jbpm.task.User<span class="jive-xml-tag"></class></span>
    <span class="jive-xml-tag"></persistence-unit></span>
<span class="jive-xml-tag"></persistence></span>
</code></pre></p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>Also I'm using custom TransactionManagerLookup class (it's specifyed in hibernate.properties):</p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><pre class="jive-pre"><code class="jive-code jive-java"><font color="navy"><b>public</b></font> <font color="navy"><b>class</b></font> TransactionManagerLookup <font color="navy"><b>extends</b></font> JNDITransactionManagerLookup <font color="navy">{</font>
    @Override
    <font color="navy"><b>protected</b></font> String getName() <font color="navy">{</font>
        <font color="navy"><b>return</b></font> <font color="red">"java:jboss/TransactionManager"</font>;
    <font color="navy">}</font>
 
 
    @Override
    <font color="navy"><b>public</b></font> String getUserTransactionName() <font color="navy">{</font>
        <font color="navy"><b>return</b></font> <font color="red">"java:comp/UserTransaction"</font>;
    <font color="navy">}</font>
<font color="navy">}</font>
</code></pre><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>I even tried to rebind UserTransaction (which Task service looks up) to BitronixTransactionManager, but it not helps. I checked that there is UserTransaction object which TaskService looks up.</p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>Thank you for your attention. Have a good day!</p></div>
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