Thank you for the further details. This issue is being tracked in this Public Issue Tracker <https://issuetracker.google.com/71840041>. As stated in the last comment, only having one instance in the Flexible Environment will often cause this issue (as I see you have 'max_num_instances' set to '1'), and it is recommended to at least have two instances. All further communications about this issue should occur in the Public Issue Tracker <https://issuetracker.google.com/71840041>.
-- 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 [email protected]. To post to this group, send email to [email protected]. 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/a62f93ce-8511-434f-8d31-6e89d11d580f%40googlegroups.com. For more options, visit https://groups.google.com/d/optout.
