1 Reply Latest reply on Dec 23, 2004 5:07 AM by Oghie Sheehy

    ClassCircularityError

    Oghie Sheehy Newbie

      Hello,

      We are experiencing an intermittent ClassCircularityError. I am pretty new to JBoss and would appreciate any help in diagnosing or resolving the problem.

      The error occurs at the point of connecting to a JMS queue. The class creating the queue connection is invoked from a Scheduled Task which is started/run at JBoss startup. The error occurs at a frequency of approximately 1 in 8 starts.

      We are running with the following versions of software:
      JBoss 3.2.5
      Java 1.4.2_06
      Red Hat Linux release 7.3 / Red Hat Enterprise Linux ES release 3

      Included are:
      a) Example output of the error
      b) scheduler-service.xml
      c) Source code of class being invoked.

      2004-12-23 08:29:12,837 55946 DEBUG [schedclient.SchedulerClient] (ThreadPoolWorker[1]:) Executed Availability Killer At: Thu Dec 23 08:29:11 GMT 2004
      2004-12-23 08:29:13,166 56275 DEBUG [schedclient.SchedulerClient] (ThreadPoolWorker[1]:) Creating Queue Connection
      2004-12-23 08:29:13,276 56385 ERROR [STDERR] (UILServerILService Accept Thread:) java.lang.ClassCircularityError: org/jboss/mq/il/uil2/SocketManager$ReadTask
      2004-12-23 08:29:13,278 56387 ERROR [STDERR] (UILServerILService Accept Thread:) at org.jboss.mq.il.uil2.SocketManager.start(SocketManager.java:115)
      2004-12-23 08:29:13,278 56387 ERROR [STDERR] (UILServerILService Accept Thread:) at org.jboss.mq.il.uil2.UILServerILService.run(UILServerILService.java:127)
      2004-12-23 08:29:13,279 56388 ERROR [STDERR] (UILServerILService Accept Thread:) at java.lang.Thread.run(Thread.java:534)
      2004-12-23 08:29:13,824 56933 INFO [org.jboss.ejb.EJBDeployer] (main:) Deployed: file:/opt/jboss-3.2.5/server/default/tmp/deploy/tmp18048BookingEngine.ear-contents/BookingEngine.jar
      2004-12-23 08:29:14,632 57741 INFO [org.jboss.deployment.EARDeployer] (main:) Started J2EE application: file:/opt/jboss-3.2.5/server/default/deploy/BookingEngine.ear
      2004-12-23 08:29:14,855 57964 INFO [org.jboss.system.server.Server] (main:) JBoss (MX MicroKernel) [3.2.5 (build: CVSTag=JBoss_3_2_5 date=200406251954)] Started in 57s:942ms
      2004-12-23 08:30:13,784 116893 ERROR [schedclient.SchedulerClient] (ThreadPoolWorker[1]:) Availability Killer Failed At: Thu Dec 23 08:29:11 GMT 2004
      org.jboss.mq.SpyJMSException: Cannot authenticate user; - nested throwable: (java.net.SocketException: Connection reset)
      at org.jboss.mq.Connection.authenticate(Connection.java:1161)
      at org.jboss.mq.Connection.(Connection.java:248)
      at org.jboss.mq.Connection.(Connection.java:325)
      at org.jboss.mq.SpyConnection.(SpyConnection.java:66)
      at org.jboss.mq.SpyConnectionFactory.createConnection(SpyConnectionFactory.java:87)
      at org.jboss.mq.SpyConnectionFactory.createQueueConnection(SpyConnectionFactory.java:124)
      at schedclient.SchedulerClient.perform(SchedulerClient.java:30)
      at org.jboss.varia.scheduler.Scheduler$Listener.handleNotification(Scheduler.java:1263)
      at sun.reflect.GeneratedMethodAccessor3.invoke(Unknown Source)
      at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
      at java.lang.reflect.Method.invoke(Method.java:324)
      at org.jboss.mx.notification.NotificationListenerProxy.invoke(NotificationListenerProxy.java:138)
      at $Proxy8.handleNotification(Unknown Source)
      at javax.management.NotificationBroadcasterSupport.handleNotification(NotificationBroadcasterSupport.java:98)
      at javax.management.NotificationBroadcasterSupport.sendNotification(NotificationBroadcasterSupport.java:83)
      at javax.management.timer.Timer.sendNotifications(Timer.java:441)
      at javax.management.timer.Timer.access$000(Timer.java:31)
      at javax.management.timer.Timer$RegisteredNotification.doRun(Timer.java:612)
      at org.jboss.mx.util.SchedulableRunnable.run(SchedulableRunnable.java:164)
      at org.jboss.mx.util.ThreadPool$Worker.run(ThreadPool.java:240)
      Caused by: java.net.SocketException: Connection reset
      at java.net.SocketInputStream.read(SocketInputStream.java:168)
      at java.io.BufferedInputStream.fill(BufferedInputStream.java:183)
      at java.io.BufferedInputStream.read1(BufferedInputStream.java:222)
      at java.io.BufferedInputStream.read(BufferedInputStream.java:277)
      at org.jboss.util.stream.NotifyingBufferedInputStream.read(NotifyingBufferedInputStream.java:77)
      at java.io.ObjectInputStream$PeekInputStream.read(ObjectInputStream.java:2150)
      at java.io.ObjectInputStream$PeekInputStream.readFully(ObjectInputStream.java:2163)
      at java.io.ObjectInputStream$BlockDataInputStream.readShort(ObjectInputStream.java:2631)
      at java.io.ObjectInputStream.readStreamHeader(ObjectInputStream.java:734)
      at java.io.ObjectInputStream.(ObjectInputStream.java:253)
      at org.jboss.mq.il.uil2.SocketManager$ReadTask.run(SocketManager.java:266)
      at java.lang.Thread.run(Thread.java:534)


      <?xml version="1.0" encoding="UTF-8"?>
      <!-- $Id: scheduler-service.xml,v 1.4.2.2 2003/10/13 12:31:03 starksm Exp $ -->



      <!-- ==================================================================== -->
      <!-- Scheduler Service -->
      <!-- ==================================================================== -->




      true
      schedclient.SchedulerClient


      NOW
      3600000
      -1
      jboss.j2ee:jndiName=comp/env/ejb/availabilityEngine,service=EJB


      <!--
      | This example shows how to use a pluggable Schedulable impl


      true
      org.jboss.varia.scheduler.example.SchedulableExample
      Schedulabe Test,12345
      java.lang.String,int
      0
      10000
      -1


      -->

      <!--
      | This example shows how to use a target MBean




      true
      :name=SchedulableMBeanExample
      hit( NOTIFICATION, DATE, REPETITIONS, SCHEDULER_NAME, java.lang.String )
      NOW
      10000
      10


      -->




      package schedclient;

      import java.util.Date;
      import org.jboss.varia.scheduler.Schedulable;
      import org.jboss.logging.Logger;
      import javax.naming.*;
      import javax.rmi.PortableRemoteObject;
      import availability.*;
      import javax.jms.QueueConnectionFactory;
      import javax.jms.QueueConnection;
      import javax.jms.QueueSession;
      import javax.jms.Queue;
      import javax.jms.QueueSender;
      import javax.jms.MapMessage;

      public class SchedulerClient implements Schedulable {

      /** Class logger. */
      private Logger log = Logger.getLogger(this.getClass());

      public SchedulerClient() {
      }

      public void perform(Date pTimeOfCall, long pRemainingRepetitions) {
      log.debug("Executed Availability Killer At: " + pTimeOfCall);
      try {
      Context ctx = getJBossInitialContext();
      QueueConnectionFactory qFactory = (QueueConnectionFactory) ctx.lookup("ConnectionFactory");
      log.debug("Creating Queue Connection");
      QueueConnection qConnection = qFactory.createQueueConnection();
      log.debug("Creating Queue Session");
      QueueSession qSession = qConnection.createQueueSession(false, javax.jms.Session.AUTO_ACKNOWLEDGE) ;
      log.debug("Staring Queue Connection");
      qConnection.start();
      log.debug("Looking up Queue");
      Queue theQueue = (Queue) ctx.lookup("queue/C");
      log.debug("Creating Sender");
      QueueSender qSender = qSession.createSender(theQueue);
      log.debug("Creating Message");
      MapMessage mapMessage = qSession.createMapMessage();
      log.debug("Setting Message Properties");
      mapMessage.setStringProperty("SchedCall", "Kill Availability");
      //call the killer method
      log.debug("Sending Message");
      qSender.send(mapMessage);
      qConnection.close();
      ctx.close();
      } catch (Exception e) {
      log.error("Availability Killer Failed At: "+pTimeOfCall, e);
      e.printStackTrace();
      }
      }

      private javax.naming.Context getJBossInitialContext() throws NamingException {
      java.util.Hashtable JNDIParm = new java.util.Hashtable();
      JNDIParm.put(Context.PROVIDER_URL, "jnp://localhost:1099");
      JNDIParm.put(Context.INITIAL_CONTEXT_FACTORY, "org.jnp.interfaces.NamingContextFactory");
      return new InitialContext(JNDIParm);
      }
      }

        • 1. Re: ClassCircularityError - scheduler-service.xml
          Oghie Sheehy Newbie

          Encoded scheduler-service.xml....

          <?xml version="1.0" encoding="UTF-8"?>
          <!-- $Id: scheduler-service.xml,v 1.4.2.2 2003/10/13 12:31:03 starksm Exp $ -->
          
          <server>
          
           <!-- ==================================================================== -->
           <!-- Scheduler Service -->
           <!-- ==================================================================== -->
          
           <classpath codebase="lib" archives="SchedClient.jar"/>
          
           <mbean code="org.jboss.varia.scheduler.Scheduler" name="jboss.util:service=Scheduler,type=ScheduleClient">
           <attribute name="StartAtStartup">true</attribute>
           <attribute name="SchedulableClass">schedclient.SchedulerClient</attribute>
           <attribute name="SchedulableArguments" />
           <attribute name="SchedulableArgumentTypes" />
           <attribute name="InitialStartDate">NOW</attribute>
           <attribute name="SchedulePeriod">3600000</attribute>
           <attribute name="InitialRepetitions">-1</attribute>
           <depends>jboss.j2ee:jndiName=comp/env/ejb/availabilityEngine,service=EJB</depends>
           </mbean>
          
           <!--
           | This example shows how to use a pluggable Schedulable impl
          
           <mbean code="org.jboss.varia.scheduler.Scheduler"
           name=":service=Scheduler">
           <attribute name="StartAtStartup">true</attribute>
           <attribute name="SchedulableClass">org.jboss.varia.scheduler.example.SchedulableExample</attribute>
           <attribute name="SchedulableArguments">Schedulabe Test,12345</attribute>
           <attribute name="SchedulableArgumentTypes">java.lang.String,int</attribute>
           <attribute name="InitialStartDate">0</attribute>
           <attribute name="SchedulePeriod">10000</attribute>
           <attribute name="InitialRepetitions">-1</attribute>
           </mbean>
          
           -->
          
           <!--
           | This example shows how to use a target MBean
          
           <mbean code="org.jboss.varia.scheduler.example.SchedulableMBeanExample"
           name=":name=SchedulableMBeanExample">
           </mbean>
           <mbean code="org.jboss.varia.scheduler.Scheduler"
           name=":service=Scheduler,name=SchedulableMBeanExample">
           <attribute name="StartAtStartup">true</attribute>
           <attribute name="SchedulableMBean">:name=SchedulableMBeanExample</attribute>
           <attribute name="SchedulableMBeanMethod">hit( NOTIFICATION, DATE, REPETITIONS, SCHEDULER_NAME, java.lang.String )</attribute>
           <attribute name="InitialStartDate">NOW</attribute>
           <attribute name="SchedulePeriod">10000</attribute>
           <attribute name="InitialRepetitions">10</attribute>
           </mbean>
          
           -->
          
          </server>