500 Internal Server Error in webdynpro

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Hi all,

i am getting the following error when i tested the application in QAE.

The error stack trace is

com.sap.tc.webdynpro.services.session.LockException: Thread SAPEngine_Application_Thread[impl:3]_14 failed to acquire exclusive lock on client session ClientSession(. m e l at com.sap.tc.webdynpro.clientserver.session.ClientSession$LockingManager.lock(ClientSession.java:1511)

at com.sap.tc.webdynpro.clientserver.session.ClientSession.doProcessing(ClientSession.java:233)

at com.sap.tc.webdynpro.clientserver.session.RequestManager.doProcessing(RequestManager.java:150)

at com.sap.tc.webdynpro.serverimpl.defaultimpl.DispatcherServlet.doContent(DispatcherServlet.java:62)

at com.sap.tc.webdynpro.serverimpl.defaultimpl.DispatcherServlet.doPost(DispatcherServlet.java:53)

at javax.servlet.http.HttpServlet.service(HttpServlet.java:760)

at javax.servlet.http.HttpServlet.service(HttpServlet.java:853)

Regards

ChandraShekar