0 Replies Latest reply on Jun 21, 2010 3:14 AM by Sanjit kumar

    Classloading problem in redployment

    Sanjit kumar Newbie

      Hello everybody,

       

      I have a curious problem with redployment same class gives classcastException

       

      I have Enterprise application (test-app.ear) following is the architecuture of the ear.

       

      test-app.ear
          + META-INF
          ++ application.xml
          + test-app.jar
          +++ test-app-jboss-beans.xml
          +++ test-model.jar
          ...
          ...
          +test-web.war
          ++ WEB-INF
          +++ jboss-web.xml
          +++ web.xml
          +++ lib
          +++ classes
          ++ (swf files)

       

      Apllication is also using quartz service to schedule the job and run job to execute the business logic. The jar files present in test-app.jar file is used by quartz services which is present in deploy directory.

       

      The first time I start jboss server all works fine, application is able to schedule the job and run the job as expected. The problem comes when I redeploy the app. Once the application gets redeployed, when I access the application. It schedule the job when quartz tries to execute the job it gives classCast exception for same class.

       

      Following is the error
      java.lang.ClassCastException: com.test.mv.model.Subscriber cannot be cast to com.test.mv.model.Subscriber
      2010-06-18 23:35:22,748 ERROR [STDERR] (DefaultQuartzScheduler_Worker-1) java.lang.ClassCastException: com.test.mv.model.Subscriber cannot be cast to com.test.mv.model.Subscriber
      2010-06-18 23:35:22,748 ERROR [STDERR] (DefaultQuartzScheduler_Worker-1)        at com.test.mv.logic.jobs.ExecutionContext.<init>(ExecutionContext.java:17)
          2010-06-18 23:35:22,748 ERROR [STDERR] (DefaultQuartzScheduler_Worker-1)        at com.test.mv.logic.jobs.ExecutionContext.fromJobExecutionContext(ExecutionContext.java:22)
          2010-06-18 23:35:22,749 ERROR [STDERR] (DefaultQuartzScheduler_Worker-1)        at com.test.mv.logic.jobs.TestJob.execute(TestJob.java:152)
          2010-06-18 23:35:22,749 ERROR [STDERR] (DefaultQuartzScheduler_Worker-1)        at org.quartz.core.JobRunShell.run(JobRunShell.java:202)
      2010-06-18 23:35:22,749 ERROR [STDERR] (DefaultQuartzScheduler_Worker-1)        at org.quartz.simpl.SimpleThreadPool$WorkerThread.run(SimpleThreadPool.java:534)

       

      It seams is the problem with class gets loaded by different classloader in case of redeployment.

       

      Can anybody help me out how I can resolve this problem.