Thank you for replying.I have seen the solution which is mentioned in that link.But I didnt get what to do.Please suggest some solution.

when i start the tomcat server it is showing error server tomcat failed to start..And also when i give the localhost:8080 in browser apache tomcat page is not opening.In console it is showing error like

Oct 04, 2015 7:36:51 PM org.apache.tomc at.util.digeste r.SetProperties Rule begin
WARNING: [SetPropertiesRu le]{Server/Service/Engine/Host/Context} Setting property 'source' to 'org.eclipse.js t.jee.server:Ca lculator1' did not find...