For those who are interested or stumble onto this thread in the future; It seems, when instances fail to serve a request, a taskqueue task, that internal failure counts as a task failure (this shouldn't happen, but does happen) It internally eats up your task_retry_limit (In my opinion, it shouldn't, as it is not controlled, and it can happen unknown times, only code exceptions/critical instance deaths should count through task retry limits)
The event is logged for a very very short time as "*Request was aborted after waiting too long to attempt to service your request.*" in the logs, this should be an error log, but it's an info log, also it disappears in <10 minutes (I have a high log storage capacity, it shouldn't disappear, but it does) -- 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 http://groups.google.com/group/google-appengine. For more options, visit https://groups.google.com/d/optout.
