Strange errors in the logfile

Question

We have a web application with servlets and jsp. We use websphere 3.0 on a solaris OS.
Shortly we have some strange errors in the logfile. 'img.class' is not found but we don't use this class. We get this error every 5 seconds.
Is there a solution for this problem???
Instantiate: img
Entering createSessionContext
Entering createSessionContext
Entering createSessionContext
191644.271 1bc3c935 WebGroup X [Servlet Error]-[{0}]: {1}: {2}
"img"
"Failed to load servlet"
javax.servlet.ServletException: Servlet [img]: Could not find required servlet class - img.class
     at java.lang.Throwable.<init>(Compiled Code)
     at java.lang.Exception.<init>(Compiled Code)
     at javax.servlet.ServletException.<init>(Compiled Code)
     at com.ibm.servlet.engine.webapp.WebAppServletManager.loadServlet(Compiled Code)
     at com.ibm.servlet.engine.webapp.WebApp.addServlet(Compiled Code)
     at com.ibm.servlet.engine.webapp.WebAppServletRegistry.addServlet(Compiled Code)
     at com.ibm.servlet.engine.webapp.InvokerServlet.service(Compiled Code)
     at javax.servlet.http.HttpServlet.service(Compiled Code)
     at com.ibm.servlet.engine.webapp.StrictServletInstance.doService(Compiled Code)
     at com.ibm.servlet.engine.webapp.StrictLifecycleServlet._service(Compiled Code)
     at com.ibm.servlet.engine.webapp.IdleServletState.service(Compiled Code)
     at com.ibm.servlet.engine.webapp.StrictLifecycleServlet.service(Compiled Code)
     at com.ibm.servlet.engine.webapp.ServletInstance.service(Compiled Code)
     at com.ibm.servlet.engine.webapp.ValidServletReferenceState.dispatch(Compiled Code)
     at com.ibm.servlet.engine.webapp.ServletInstanceReference.dispatch(Compiled Code)
     at com.ibm.servlet.engine.webapp.WebAppRequestDispatcher.handleWebAppDispatch(Compiled Code)
     at com.ibm.servlet.engine.webapp.WebAppRequestDispatcher.dispatch(Compiled Code)
     at com.ibm.servlet.engine.webapp.WebAppRequestDispatcher.forward(Compiled Code)
     at com.ibm.servlet.engine.srt.WebAppInvoker.handleInvocationHook(Compiled Code)
     at com.ibm.servlet.engine.invocation.CachedInvocation.handleInvocation(Compiled Code)
     at com.ibm.servlet.engine.invocation.CacheableInvocationContext.invoke(Compiled Code)
     at com.ibm.servlet.engine.srp.ServletRequestProcessor.dispatchByURI(Compiled Code)
     at com.ibm.servlet.engine.oselistener.OSEListenerDispatcher.service(Compiled Code)
     at com.ibm.servlet.engine.oselistener.SQEventListenerImp$ServiceRunnable.run(Compiled Code)
     at com.ibm.servlet.engine.oselistener.SQEventListenerImp.notifySQEvent(Compiled Code)
     at com.ibm.servlet.engine.oselistener.serverqueue.SQEventSource.notifyEvent(Compiled Code)
     at com.ibm.servlet.engine.oselistener.serverqueue.SQWrapperEventSource$SelectRunnable.notifyService(Compiled Code)
     at com.ibm.servlet.engine.oselistener.serverqueue.SQWrapperEventSource$SelectRunnable.run(Compiled Code)
     at com.ibm.servlet.engine.oselistener.outofproc.OutOfProcThread$CtlRunnable.run(Compiled Code)
     at java.lang.Thread.run(Compiled Code)

Answer 1

it seems your servlet packages is dammaged or bad installed...
this class img.class may being used by another class your system didn't founded...
review your server installation, permissions, etc.