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Re: jBPM5.1 : History Information and Reporting using API
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created by <a href="http://community.jboss.org/people/sandip.bhoi">Sandip Bhoi</a> in <i>jBPM</i> - <a href="http://community.jboss.org/message/638221#638221">View the full discussion</a>
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<div class="jive-rendered-content"><p>Hi Demian,</p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>Sorry for being so dump <span> :( </span> </p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>What could be the wrong with following code. I am getting NPE.</p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>public void init() throws ServletException {</p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>        super.init();</p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>        try {</p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>            UserTransaction ut = (UserTransaction) new InitialContext().lookup("java:comp/UserTransaction");</p><p>            ut.begin();</p><p>            StatefulKnowledgeSession ksession = JbpmAPIUtil.getSession();</p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>            /* Create the knowledge base */</p><p>            </p><p>            JPAWorkingMemoryDbLogger  logger = new JPAWorkingMemoryDbLogger (ksession);</p><p>            JPAProcessInstanceDbLog  processInstaceLogger = new JPAProcessInstanceDbLog (ksession.getEnvironment());</p><p>            </p><p>            CommandBasedWSHumanTaskHandler taskHandler = new CommandBasedWSHumanTaskHandler(ksession);</p><p>            ksession.getWorkItemManager().registerWorkItemHandler("Human Task", taskHandler);</p><p>            taskHandler.connect();</p><p>            ut.commit();</p><p>            logger.dispose();</p><p>            processInstaceLogger.dispose();</p><p>        } catch (Throwable t) {</p><p>            // log.error(t.getMessage(), t.getCause());</p><p>            throw new RuntimeException("error while creating session", t);</p><p>        }</p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>    }</p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>Nov 24, 2011 10:26:14 PM org.apache.catalina.core.ApplicationContext log</p><p>SEVERE: StandardWrapper.Throwable</p><p>java.lang.RuntimeException: error while creating session</p><p>    at com.sample.processserver.TaskProcessServlet.init(TaskProcessServlet.java:43)</p><p>    at javax.servlet.GenericServlet.init(GenericServlet.java:160)</p><p>    at org.apache.catalina.core.StandardWrapper.initServlet(StandardWrapper.java:1190)</p><p>    at org.apache.catalina.core.StandardWrapper.loadServlet(StandardWrapper.java:1103)</p><p>    at org.apache.catalina.core.StandardWrapper.load(StandardWrapper.java:1010)</p><p>    at org.apache.catalina.core.StandardContext.loadOnStartup(StandardContext.java:4957)</p><p>    at org.apache.catalina.core.StandardContext$3.call(StandardContext.java:5284)</p><p>    at org.apache.catalina.core.StandardContext$3.call(StandardContext.java:5279)</p><p>    at java.util.concurrent.FutureTask$Sync.innerRun(Unknown Source)</p><p>    at java.util.concurrent.FutureTask.run(Unknown Source)</p><p>    at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(Unknown Source)</p><p>    at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)</p><p>    at java.lang.Thread.run(Unknown Source)</p><p>Caused by: java.lang.NullPointerException</p><p>    at org.jbpm.process.audit.JPAProcessInstanceDbLog.dispose(JPAProcessInstanceDbLog.java:165)</p><p>    at com.sample.processserver.TaskProcessServlet.init(TaskProcessServlet.java:40)</p><p>    ... 12 more</p><p>Nov 24, 2011 10:26:14 PM org.apache.catalina.core.StandardContext loadOnStartup</p><p>SEVERE: Servlet /OrderFactoryWeb threw load() exception</p><p>java.lang.NullPointerException</p><p>    at org.jbpm.process.audit.JPAProcessInstanceDbLog.dispose(JPAProcessInstanceDbLog.java:165)</p><p>    at com.sample.processserver.TaskProcessServlet.init(TaskProcessServlet.java:40)</p><p>    at javax.servlet.GenericServlet.init(GenericServlet.java:160)</p><p>    at org.apache.catalina.core.StandardWrapper.initServlet(StandardWrapper.java:1190)</p><p>    at org.apache.catalina.core.StandardWrapper.loadServlet(StandardWrapper.java:1103)</p><p>    at org.apache.catalina.core.StandardWrapper.load(StandardWrapper.java:1010)</p><p>    at org.apache.catalina.core.StandardContext.loadOnStartup(StandardContext.java:4957)</p><p>    at org.apache.catalina.core.StandardContext$3.call(StandardContext.java:5284)</p><p>    at org.apache.catalina.core.StandardContext$3.call(StandardContext.java:5279)</p><p>    at java.util.concurrent.FutureTask$Sync.innerRun(Unknown Source)</p><p>    at java.util.concurrent.FutureTask.run(Unknown Source)</p><p>    at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(Unknown Source)</p><p>    at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)</p><p>    at java.lang.Thread.run(Unknown Source)</p><p>Nov 24, 2011 10:26:14 PM org.apache.solr.servlet.SolrServlet init</p><p>INFO: SolrServlet.init()</p></div>
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