GWT, Google App Engine, TimerTask or Thread in ServiceImpl throw exception

Question

I am using GWT and Google App Engine. I have array of records and I want to update them every 30 mins. In the ServiceImpl I have the fallowing code :

Answer 1

The issue is not just in App engine, but in general in any Servlet container. When one is in a service method (which you are always in Servlet container), you can not create threads and do sleeps.

In today's scalable service world, thread.sleep is a bad thing....