The following crates are to be released: - tower - tower-buffer - tower-discover - tower-layer - tower-limit - tower-load-shed - tower-retry - tower-service - tower-test - tower-timeout - tower-util
- Inspect the request, response, and error when determining to retry - Return a future if retry is desired - This future allows an impl to delay a retry - The future yields a new `Policy`, allowing state to be changed for later retries.