You are using eclipse ide to develop your application. All the changes you make in your application is gets stored in metadata in your workspace folder. when you run the application you will get url when u open the url in web browser it shows errors.
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when you run ur application in ide ,you get url and when u open in browser that url fetches all information from your workspace. if you are given your workspace name as sathya workspace then at runtime eclipse will create a new its own workspace sathya%40workspace in this manner and search for all information in its newly created workspace. To Avoid such problems while naming the eclipse workspace follow in this way sathya_workspace or sathya.