app engine java: debugging servlet

Question

This may be a basic question but I am using app engine in eclipse to develop a servlet and would like to debug my application as there is a line of code which is tripping my application somewhere and causing it to output nothing but a server error. I have tried debugging by right clicking and selecting Debug As -> Web Application and opening a browser to http://localhost:8888/ and selecting my servlet but when I do this I do not see eclipse indigo classic step through the servlet's lines of code. And I don't know where to find a log file with the offending output. Any tips on how to proceed with the app engine servlet debug process would be highly appreciated.

Thanks,

John Goche

Answer 1

Your application needs some configuration if you want to be able to run it locally. Open Properties > Deployment assembly of your project, and specify how its structure maps to the web app structure. Then starting a local tomcat in debug mode (with the app deployed there) should work fine (unless you use the Datastore)