I am using google app engine. Before everything was working fine but now when i call a servlet, browser takes a lot of time and then shows this:
DeleteBooksServlet: com.google.apphosting.api.DeadlineExceededException: This request (0000000000000000) started at 2011/10/08 10:58:13.573 UTC and was still executing at 2011/10/08 10:59:13.036 UTC.
In that servlet i have a query which takes all books from database and then delete them.
Before same servlet was working fine but now i am getting this. Why i am getting this thing now? Thanks in advance.
Because you certainly have so many books in the database that the query takes a lot of time (more than 1 minute), and that GAE throws this exception when a request is so long.
See http://code.google.com/intl/en-US/appengine/docs/java/runtime.html#Quotas_and_Limits