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UTF data for mat exception

 
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Hi All,
Any body can help me to resolve this problem.
Environment: WebSphere 3.5
I am passing data from applet to servlet using hash tables. When going from applet(i.e on click save button in applet side) to servlet it is throwing exception. In servlet side it is not able to read the object (Hash table).
I get the errors below:
Thanx in advance
Regards,
java.io.UTFDataFormatException
at java.io.UTFDataFormatException.<init>(UTFDataFormatException.java:39)
at java.io.DataInputStream.readUTF(DataInputStream.java(Compiled Code))
at java.io.ObjectInputStream.readUTF(ObjectInputStream.java(Compiled Code))
at java.io.ObjectInputStream.readObject(ObjectInputStream.java(Compiled Code))
at java.io.ObjectInputStream.inputClassFields(ObjectInputStream.java(Compiled Code))
at java.io.ObjectInputStream.defaultReadObject(ObjectInputStream.java(Compiled Code))
at java.io.ObjectInputStream.inputObject(ObjectInputStream.java(Compiled Code))
at java.io.ObjectInputStream.readObject(ObjectInputStream.java(Compiled Code))
at java.io.ObjectInputStream.readObject(ObjectInputStream.java(Compiled Code))
at java.util.Hashtable.readObject(Hashtable.java:775)
at java.lang.reflect.Method.invoke(Native Method)
at java.io.ObjectInputStream.invokeObjectReader(ObjectInputStream.java(Compiled Code))
at java.io.ObjectInputStream.inputObject(ObjectInputStream.java(Compiled Code))
at java.io.ObjectInputStream.readObject(ObjectInputStream.java(Compiled Code))
at java.io.ObjectInputStream.readObject(ObjectInputStream.java(Compiled Code))
at java.util.Hashtable.readObject(Hashtable.java:775)
at java.lang.reflect.Method.invoke(Native Method)
at java.io.ObjectInputStream.invokeObjectReader(ObjectInputStream.java(Compiled Code))
at java.io.ObjectInputStream.inputObject(ObjectInputStream.java(Compiled Code))
at java.io.ObjectInputStream.readObject(ObjectInputStream.java(Compiled Code))
at java.io.ObjectInputStream.readObject(ObjectInputStream.java(Compiled Code))
at chekhov.que.QUES007.doPost(QUES007.java(Compiled Code))
at javax.servlet.http.HttpServlet.service(HttpServlet.java:760)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:853)
at com.ibm.servlet.engine.webapp.StrictServletInstance.doService(ServletManager.java:626)
at com.ibm.servlet.engine.webapp.StrictLifecycleServlet._service(StrictLifecycleServlet.java:160)
at com.ibm.servlet.engine.webapp.IdleServletState.service(StrictLifecycleServlet.java:287)
at com.ibm.servlet.engine.webapp.StrictLifecycleServlet.service(StrictLifecycleServlet.java:105)
at com.ibm.servlet.engine.webapp.ServletInstance.service(ServletManager.java:360)
at com.ibm.servlet.engine.webapp.ValidServletReferenceState.dispatch(ServletManager.java:775)
at com.ibm.servlet.engine.webapp.ServletInstanceReference.dispatch(ServletManager.java:701)
at com.ibm.servlet.engine.webapp.WebAppRequestDispatcher.handleWebAppDispatch(WebAppRequestDispatcher.java:478)
at com.ibm.servlet.engine.webapp.WebAppRequestDispatcher.dispatch(WebAppRequestDispatcher.java:234)
at com.ibm.servlet.engine.webapp.WebAppRequestDispatcher.forward(WebAppRequestDispatcher.java:138)
at com.ibm.servlet.engine.srt.WebAppInvoker.handleInvocationHook(WebAppInvoker.java:77)
at com.ibm.servlet.engine.invocation.CachedInvocation.handleInvocation(CachedInvocation.java:67)
at com.ibm.servlet.engine.invocation.CacheableInvocationContext.invoke(CacheableInvocationContext.java:106)
at com.ibm.servlet.engine.srp.ServletRequestProcessor.dispatchByURI(ServletRequestProcessor.java:160)
at com.ibm.servlet.engine.oselistener.OSEListenerDispatcher.service(OSEListener.java:300)
at com.ibm.servlet.engine.oselistener.SQEventListenerImp$ServiceRunnable.run(SQEventListenerImp.java:230)
at com.ibm.servlet.engine.oselistener.SQEventListenerImp.notifySQEvent(SQEventListenerImp.java:104)
at com.ibm.servlet.engine.oselistener.serverqueue.SQEventSource.notifyEvent(SQEventSource.java:212)
at com.ibm.servlet.engine.oselistener.serverqueue.SQWrapperEventSource$SelectRunnable.notifyService(SQWrapperEventSource.java:353)
at com.ibm.servlet.engine.oselistener.serverqueue.SQWrapperEventSource$SelectRunnable.run(SQWrapperEventSource.java:220)
at com.ibm.servlet.engine.oselistener.outofproc.OutOfProcThread$CtlRunnable.run(OutOfProcThread.java:248)
at java.lang.Thread.run(Thread.java:481)
 
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