Just a quick note (and I'm sure that you're already aware of this, but for the benefit of others reading this): when "some tasks ... have failed [to be scheduled]" the task queue uses an exponential backoff algorithm, so the failed tasks will be delayed. See the configuration options in queue.yaml (https://cloud.google.com/appengine/docs/standard/python/config/queueref) - especially the "retry_parameters" and their default values.
If you browse your queue in the cloud console, you can see how many (if any) times a task has been retried. You can also check this from within the task by looking at the "X-AppEngine-TaskRetryCount" header. Cheers, Attila -- 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/36df5504-bb13-4e20-8a7f-3b9fbfe4334b%40googlegroups.com. For more options, visit https://groups.google.com/d/optout.
