Your project's logs show quite a few errors for the Cloud HTTP Load Balancer. You may consider checking these log entries and investigating possible error origins in your app's code and load balancing settings.
Related solutions have been provided on stackoverflow in reply to the "Compute Engine HTTP Load Balancing 502 errors" question <https://stackoverflow.com/questions/32552772/compute-engine-http-load-balancing-502-error?answertab=votes#tab-top> and to "Google Cloud HTTP balancer returns 502 error <https://serverfault.com/questions/702809/google-cloud-http-balancer-returns-502-error?answertab=votes#tab-top>". I encourage you to take a look at these 2 pages, and maybe adopt solutions suitable to your situation. If this still does not help, you are most welcome sharing the remaining issues here. -- You received this message because you are subscribed to the Google Groups "Google App Engine" group. To unsubscribe from this group and stop receiving emails from it, send an email to google-appengine+unsubscr...@googlegroups.com. To post to this group, send email to google-appengine@googlegroups.com. Visit this group at https://groups.google.com/group/google-appengine. To view this discussion on the web visit https://groups.google.com/d/msgid/google-appengine/d61d5893-0f71-4523-9160-6e3b410552d8%40googlegroups.com. For more options, visit https://groups.google.com/d/optout.
