<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">
<html>
<body link="#355491" alink="#4262a1" vlink="#355491" style="background: #e2e2e2; margin: 0; padding: 20px;">
<div>
<table cellpadding="0" bgcolor="#FFFFFF" border="0" cellspacing="0" style="border: 1px solid #dadada; margin-bottom: 30px; width: 100%; -moz-border-radius: 6px; -webkit-border-radius: 6px;">
<tbody>
<tr>
<td>
<table border="0" cellpadding="0" cellspacing="0" bgcolor="#FFFFFF" style="border: solid 2px #ccc; background: #dadada; width: 100%; -moz-border-radius: 6px; -webkit-border-radius: 6px;">
<tbody>
<tr>
<td bgcolor="#000000" valign="middle" height="58px" style="border-bottom: 1px solid #ccc; padding: 20px; -moz-border-radius-topleft: 3px; -moz-border-radius-topright: 3px; -webkit-border-top-right-radius: 5px; -webkit-border-top-left-radius: 5px;">
<h1 style="color: #333333; font: bold 22px Arial, Helvetica, sans-serif; margin: 0; display: block !important;">
<!-- To have a header image/logo replace the name below with your img tag -->
<!-- Email clients will render the images when the message is read so any image -->
<!-- must be made available on a public server, so that all recipients can load the image. -->
<a href="https://community.jboss.org/index.jspa" style="text-decoration: none; color: #E1E1E1">JBoss Community</a></h1>
</td>
</tr>
<tr>
<td bgcolor="#FFFFFF" style="font: normal 12px Arial, Helvetica, sans-serif; color:#333333; padding: 20px; -moz-border-radius-bottomleft: 4px; -moz-border-radius-bottomright: 4px; -webkit-border-bottom-right-radius: 5px; -webkit-border-bottom-left-radius: 5px;"><h3 style="margin: 10px 0 5px; font-size: 17px; font-weight: normal;">
Re: Error "Timeout trying to lock table 'PROCESSINSTANCELOG'"
</h3>
<span style="margin-bottom: 10px;">
created by <a href="https://community.jboss.org/people/amizzo">Massimiliano Izzo</a> in <i>jBPM</i> - <a href="https://community.jboss.org/message/821060#821060">View the full discussion</a>
</span>
<hr style="margin: 20px 0; border: none; background-color: #dadada; height: 1px;">
<div class="jive-rendered-content"><p>Finally I understood why we receive this error.</p><p>The script task should not sleep. If you need to process some time consuming task, you should register your own workitemhandler (through the session.template file).</p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>Something like the following:</p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>public class MizzoTaskHandler  implements WorkItemHandler {</p><p>  private WorkItemManager workItemManager;</p><p>  private WorkItem workItem;</p><p>  private long workItemId;</p><p>  private Map results;</p><p>  private StatefulKnowledgeSession ksession;</p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>  public MizzoTaskHandler(StatefulKnowledgeSession ksession){</p><p>    this.ksession = ksession;</p><p>  }</p><p>  </p><p>  public void executeWorkItem(WorkItem workItem, WorkItemManager workItemManager) {</p><p>    this.workItemId = workItem.getId();</p><p>    this.workItemManager = workItemManager;</p><p>    this.workItem = workItem;</p><p>    System.out.println("exec:" + workItemId);</p><p>    results = new HashMap();</p><p>    Thread th=new Thread(){</p><p>      public void run(){</p><p>        results.put("testWH",testleggiQ());</p><p>        ksession.getWorkItemManager().completeWorkItem(workItemId,results);</p><p>      }</p><p>    };</p><p>    th.start();</p><p>  }</p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>  public void abortWorkItem(WorkItem workItem, WorkItemManager workItemManager) {</p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>  }</p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>  public void completeWorkItem() {</p><p>    workItemManager.completeWorkItem(workItemId, results);</p><p>  }</p><p>  public static String testleggiQ() {</p><p>    QueueConnection jmsConnection = null;</p><p>    QueueSession jmsSession = null;</p><p>    MessageConsumer receiver = null;</p><p>    try {</p><p>      Hashtable env = new Hashtable();</p><p>      env.put(Context.INITIAL_CONTEXT_FACTORY, "org.jnp.interfaces.NamingContextFactory");</p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>      env.put(Context.PROVIDER_URL, "jnp://127.0.0.1:1099");</p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>      InitialContext iniCtx = new InitialContext(env);</p><p>      Object tmp = iniCtx.lookup("ConnectionFactory");</p><p>      QueueConnectionFactory tcf = (QueueConnectionFactory)tmp;</p><p>      jmsConnection = tcf.createQueueConnection();</p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>      // jmsConnection.setClientID((String)contextResources.get("JMS_CLIENT_ID"));</p><p>      Queue qu = (Queue)iniCtx.lookup("queue/testQIn");</p><p>      jmsSession = jmsConnection.createQueueSession(false, QueueSession.AUTO_ACKNOWLEDGE);</p><p>      receiver = jmsSession.createConsumer(qu);</p><p>      jmsConnection.start();</p><p>      TextMessage msg = (TextMessage)receiver.receive();</p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>      return msg.getText();</p><p>    }</p><p>    catch (Exception ex) {</p><p>      ex.printStackTrace();</p><p>    }</p><p>    finally {</p><p>      try {</p><p>        if (receiver != null)</p><p>          receiver.close();</p><p>        if (jmsSession != null)</p><p>          jmsSession.close();</p><p>        if (jmsConnection != null)</p><p>          jmsConnection.close();</p><p>      }</p><p>      catch (Exception ex2) {</p><p>        ex2.printStackTrace();</p><p>      }</p><p>    }</p><p>    return "";</p><p>  }</p><p>}</p></div>
<div style="background-color: #f4f4f4; padding: 10px; margin-top: 20px;">
<p style="margin: 0;">Reply to this message by <a href="https://community.jboss.org/message/821060#821060">going to Community</a></p>
<p style="margin: 0;">Start a new discussion in jBPM at <a href="https://community.jboss.org/choose-container!input.jspa?contentType=1&containerType=14&container=2034">Community</a></p>
</div></td>
</tr>
</tbody>
</table>
</td>
</tr>
</tbody>
</table>
</div>
</body>
</html>