Push pubsub messages on app engine results in 403 error
I am trying to integrate google pubsub into my project. So far I managed to get everyhting to work (create/delete topics/subscriptions publish and pull messages) except for push endpoints, I am unable to sent messages to them. I am using app engine flex environment, and used this code as sample: https://github.com/GoogleCloudPlatform/cloud-pubsub-samples-java/tree/master/appengine-push I am not getting any useful logs except a 403 error similar to this " POST /_ah/push-handlers/receive_message? HTTP/1.1" 403 156 - "-" "versionId-dot-projectId.com" I followed the document in here which explains what to do in case of 403, but no luck. https://cloud.google.com/pubsub/docs/troubleshooting https://cloud.google.com/pubsub/docs/advanced#gae-endpoints My questions: Does pubsub need ssl certificates even on app engine. If it does, what sort of self signed certificates are acceptable.
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