App Engine for Go app update not reflecting

Question

Using Google App Engine for Go.

I have successfully deployed my project update, but it is not reflected back on the Web URL. Does anyone have any idea about that?

I have tried Updating it twice.

Command tried
goapp deploy
appcfg.py update myapp/

Answer 1

When you switch version numbers, App Engine will continue serving the old version until you have changed the default version in the App Engine console. This is by design; it allows you to have a newer version running in production that you can test without disrupting existing users (you can also run an A/B test on the different versions that are currently pushed to production).