Question

When I run my Java Web App, made using Netbeans, it runs perfectly with no problems, and everything seems to work, but if I leave it be, after some idle time, if wanted to do anything with it (mostly loading rows from database, jquery, ajax), nothing happens, when I refresh the page, I get this error.

I’m sorry because I couldn’t post the log here, it was too big and my browser crashed every time I pasted, and when it worked Stackoverflow has a limit…so I uploaded it and here’s the link.

http://www.crocko.com/99F6AEF8373B425A885BD379686EF2C5/server.log_2012-08-11T05-03-18

StandardWrapperValve[JoinPart]: PWC1406: Servlet.service() for servlet JoinPart threw exception
java.lang.NumberFormatException: null
    at java.lang.Integer.parseInt(Integer.java:454)
    at java.lang.Integer.parseInt(Integer.java:527)
    at JoinPart.doGet(JoinPart.java:315)
    at javax.servlet.http.HttpServlet.service(HttpServlet.java:668)
    at javax.servlet.http.HttpServlet.service(HttpServlet.java:770

EDIT: the current project was a copy of a previous project that contained a servlet JoinPart.java, after creating this copy, I deleted this servlet because I no longer needed it, I don’t know if it still exist in some traces of this project, how can I get rid of it? this servlet is already deleted, I checked the javascript files, and none of them contains ajax requests on this servlet, I should have created a whole new project instead of copying, how can I get rid of any traces of this servlet?

Answer 1

Never copy projects if you intend to work on something completely different, always create new projects!