SimpleThreadPool - Classcast exception

[Manas Ahlaad]

I am using Quartz as scheduler for an application deployed on WebSphere 4.0 . I dont see any issues if WebSphere server is on Windows NT machine, but if I deploy it on an UNIX machine ( AIX ) I get SimpleThreadPool - Classcast exception

more specifically
========================


[3/16/05 14:47:32:927 GMT+00:00] 376e4a65 SystemOut U 2005-03-16 14:47:32,922 [ORB.thread.pool:2] ERROR com.honeywell.eac.admin.ejb.AdminGeneralManagerBean - ThreadPool class 'org.quartz.simpl.SimpleThreadPool' could not be instantiated.
org.quartz.SchedulerException: ThreadPool class 'org.quartz.simpl.SimpleThreadPool' could not be instantiated. [See nested exception: java.lang.ClassCastException: org.quartz.simpl.SimpleThreadPool]
at org.quartz.impl.StdSchedulerFactory.instantiate(StdSchedulerFactory.java:462)
at org.quartz.impl.StdSchedulerFactory.getScheduler(StdSchedulerFactory.java:837)
at com.honeywell.eac.adhocquery.scheduler.AdhocQuerySchedulerManager.getAdhocQueryScheduler(AdhocQuerySchedulerManager.java:53)
at com.honeywell.eac.adhocquery.scheduler.AdhocQuerySchedulerManagerServlet.init(AdhocQuerySchedulerManagerServlet.java:64)
at javax.servlet.GenericServlet.init(GenericServlet.java:258)
at com.ibm.servlet.engine.webapp.StrictServletInstance.doInit(ServletManager.java:802)
at com.ibm.servlet.engine.webapp.StrictLifecycleServlet._init(StrictLifecycleServlet.java:141)
at com.ibm.servlet.engine.webapp.PreInitializedServletState.init(StrictLifecycleServlet.java:254)
at com.ibm.servlet.engine.webapp.StrictLifecycleServlet.init(StrictLifecycleServlet.java(Inlined Compiled Code))
at com.ibm.servlet.engine.webapp.ServletInstance.init(ServletManager.java(Compiled Code))
at javax.servlet.GenericServlet.init(GenericServlet.java(Inlined Compiled Code))
at com.ibm.servlet.engine.webapp.ServletManager.addServlet(ServletManager.java(Compiled Code))
at com.ibm.servlet.engine.webapp.WebAppServletManager.loadServlet(WebAppServletManager.java(Compiled Code))
at com.ibm.servlet.engine.webapp.WebAppServletManager.loadAutoLoadServlets(WebAppServletManager.java(Compiled Code))
at com.ibm.servlet.engine.webapp.WebApp.loadServletManager(WebApp.java:1217)
at com.ibm.servlet.engine.webapp.WebApp.init(WebApp.java:145)
at com.ibm.servlet.engine.srt.WebGroup.loadWebApp(WebGroup.java:259)
at com.ibm.servlet.engine.srt.WebGroup.init(WebGroup.java:168)
at com.ibm.servlet.engine.ServletEngine.addWebApplication(ServletEngine.java:857)
at com.ibm.ws.runtime.WebContainer.install(WebContainer.java:43)
at com.ibm.ws.runtime.Server.startModule(Server.java:617)
at com.ibm.ejs.sm.active.ActiveModule.startModule(ActiveModule.java:511)
at com.ibm.ejs.sm.active.ActiveModule.startAction(ActiveModule.java:355)
at com.ibm.ejs.sm.active.ActiveObject.startObject(ActiveObject.java:722)
at com.ibm.ejs.sm.active.ActiveObject.start(ActiveObject.java:131)
at com.ibm.ejs.sm.active.ActiveObject.operateOnContainedObjects(ActiveObject.java:622)
at com.ibm.ejs.sm.active.ActiveEJBServer.startAction(ActiveEJBServer.java:735)
at com.ibm.ejs.sm.active.ActiveObject.startObject(ActiveObject.java:722)
at com.ibm.ejs.sm.active.ActiveObject.start(ActiveObject.java:131)
at java.lang.reflect.Method.invoke(Native Method)
at com.ibm.ejs.sm.agent.AdminAgentImpl.activeObjectInvocation(AdminAgentImpl.java:93)
at com.ibm.ejs.sm.agent.AdminAgentImpl.invokeActiveObject(AdminAgentImpl.java:62)
at com.ibm.ejs.sm.agent._AdminAgentImpl_Tie._invoke(_AdminAgentImpl_Tie.java:73)
at com.ibm.CORBA.iiop.ExtendedServerDelegate.dispatch(ExtendedServerDelegate.java:532)
at com.ibm.CORBA.iiop.ORB.process(ORB.java:2450)
at com.ibm.CORBA.iiop.OrbWorker.run(OrbWorker.java:186)
at com.ibm.ejs.oa.pool.ThreadPool$PooledWorker.run(ThreadPool.java:104)
at com.ibm.ws.util.CachedThread.run(ThreadPool.java:144)
* Nested Exception (Underlying Cause) ---------------
java.lang.ClassCastException: org.quartz.simpl.SimpleThreadPool
at org.quartz.impl.StdSchedulerFactory.instantiate(StdSchedulerFactory.java:460)
at org.quartz.impl.StdSchedulerFactory.getScheduler(StdSchedulerFactory.java:837)
at com.honeywell.eac.adhocquery.scheduler.AdhocQuerySchedulerManager.getAdhocQueryScheduler(AdhocQuerySchedulerManager.java:53)
at com.honeywell.eac.adhocquery.scheduler.AdhocQuerySchedulerManagerServlet.init(AdhocQuerySchedulerManagerServlet.java:64)
at javax.servlet.GenericServlet.init(GenericServlet.java:258)
at com.ibm.servlet.engine.webapp.StrictServletInstance.doInit(ServletManager.java:802)
at com.ibm.servlet.engine.webapp.StrictLifecycleServlet._init(StrictLifecycleServlet.java:141)
at com.ibm.servlet.engine.webapp.PreInitializedServletState.init(StrictLifecycleServlet.java:254)
at com.ibm.servlet.engine.webapp.StrictLifecycleServlet.init(StrictLifecycleServlet.java(Inlined Compiled Code))
at com.ibm.servlet.engine.webapp.ServletInstance.init(ServletManager.java(Compiled Code))
at javax.servlet.GenericServlet.init(GenericServlet.java(Inlined Compiled Code))
at com.ibm.servlet.engine.webapp.ServletManager.addServlet(ServletManager.java(Compiled Code))
at com.ibm.servlet.engine.webapp.WebAppServletManager.loadServlet(WebAppServletManager.java(Compiled Code))
at com.ibm.servlet.engine.webapp.WebAppServletManager.loadAutoLoadServlets(WebAppServletManager.java(Compiled Code))
at com.ibm.servlet.engine.webapp.WebApp.loadServletManager(WebApp.java:1217)
at com.ibm.servlet.engine.webapp.WebApp.init(WebApp.java:145)
at com.ibm.servlet.engine.srt.WebGroup.loadWebApp(WebGroup.java:259)
at com.ibm.servlet.engine.srt.WebGroup.init(WebGroup.java:168)
at com.ibm.servlet.engine.ServletEngine.addWebApplication(ServletEngine.java:857)
at com.ibm.ws.runtime.WebContainer.install(WebContainer.java:43)
at com.ibm.ws.runtime.Server.startModule(Server.java:617)
at com.ibm.ejs.sm.active.ActiveModule.startModule(ActiveModule.java:511)
at com.ibm.ejs.sm.active.ActiveModule.startAction(ActiveModule.java:355)
at com.ibm.ejs.sm.active.ActiveObject.startObject(ActiveObject.java:722)
at com.ibm.ejs.sm.active.ActiveObject.start(ActiveObject.java:131)
at com.ibm.ejs.sm.active.ActiveObject.operateOnContainedObjects(ActiveObject.java:622)
at com.ibm.ejs.sm.active.ActiveEJBServer.startAction(ActiveEJBServer.java:735)
at com.ibm.ejs.sm.active.ActiveObject.startObject(ActiveObject.java:722)
at com.ibm.ejs.sm.active.ActiveObject.start(ActiveObject.java:131)
at java.lang.reflect.Method.invoke(Native Method)
at com.ibm.ejs.sm.agent.AdminAgentImpl.activeObjectInvocation(AdminAgentImpl.java:93)
at com.ibm.ejs.sm.agent.AdminAgentImpl.invokeActiveObject(AdminAgentImpl.java:62)
at com.ibm.ejs.sm.agent._AdminAgentImpl_Tie._invoke(_AdminAgentImpl_Tie.java:73)
at com.ibm.CORBA.iiop.ExtendedServerDelegate.dispatch(ExtendedServerDelegate.java:532)
at com.ibm.CORBA.iiop.ORB.process(ORB.java:2450)
at com.ibm.CORBA.iiop.OrbWorker.run(OrbWorker.java:186)
at com.ibm.ejs.oa.pool.ThreadPool$PooledWorker.run(ThreadPool.java:104)
at com.ibm.ws.util.CachedThread.run(ThreadPool.java:144)




Is there a jdk or websphere specific class called SimpleThreadPool that conflicts with Quartz specific SimpleThreadPool and throwing classcast exception ?

To avoid this, where do I put quartz.jar file so that WebSphere always takes SimpleThreadPool inside Quartz jar and doesnt throw Class Cast Exception . Please help.

Thanks in advance