grpc-js: Only automatically retry picks on known error #1286
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The automatic retry code was originally added to handle the "New streams cannot be created after receiving a GOAWAY" error. To avoid another retry loop (googleapis/nodejs-pubsub#890), we should only retry on errors that are related to the http2 session's connectivity state, and so far, that is the only known error like that.
That error code string comes from nodejs/help#2105 (comment).