Google App Engine: WARNING: failed Server@3d484a8a: java.net.BindException: Address already in use

Question

I just started learning about servers, and I am messing around with Google's App Engine. I am trying to get through App Engine's tutorial located here using Eclipse on Mac, but I am getting a problem that reads:

Jun 24, 2010 4:35:08 PM com.google.apphosting.utils.jetty.JettyLogger info
INFO: Logging to JettyLogger(null) via com.google.apphosting.utils.jetty.JettyLogger
Jun 24, 2010 4:35:08 PM com.google.apphosting.utils.config.AppEngineWebXmlReader readAppEngineWebXml
INFO: Successfully processed /Users/ayanonagon/Desktop/Venmo/iPhoneApplication/Guestbook/war/WEB-INF/appengine-web.xml
Jun 24, 2010 4:35:08 PM com.google.apphosting.utils.config.AbstractConfigXmlReader readConfigXml
INFO: Successfully processed /Users/ayanonagon/Desktop/Venmo/iPhoneApplication/Guestbook/war/WEB-INF/web.xml
Jun 24, 2010 4:35:08 PM com.google.apphosting.utils.jetty.JettyLogger warn
WARNING: failed [email protected]:8888: java.net.BindException: Address already in use
Jun 24, 2010 4:35:08 PM com.google.apphosting.utils.jetty.JettyLogger warn
WARNING: failed Server@3d484a8a: java.net.BindException: Address already in use

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Could not open the requested socket: Address already in use
Try overriding --address and/or --port.

I've tried searching the problem, and no, the red square in the console view is not red. It might somehow be a Mac problem, since my friend who is also going through the tutorial is not getting any problems. Maybe something to do with localhost:8888?

Answer 1

This means you either have another instance running on the port or you have another prgram listening on the port. What else do you have on port 8888 ?

If you want to customize how the server is started, you can create a new Run/Debug configuration of the type "Web Application." in eclipse or change the existing one you have.

Answer 2

You most likely have a previous instance running (check the console selection button, or just File -> Restart)

The error means that the web server could not bind to the port (like 8080, or 80) it was told to because another program already has bound itself to it.