• Reliable delivery retries: Each relay fan-out target now receives one initial attempt plus five delayed retries.
• Bounded Fibonacci backoff: Retry delays occur at approximately 8, 13, 21, 34, and 55 seconds.
• Longer activity retention: Shared activity bodies remain in Redis for 15 minutes, covering the full retry window with additional margin.
• Correct terminal accounting: remain_count is reduced only after successful delivery or final retry exhaustion—not after every failed attempt.
• Protection against premature payload deletion: A temporary failure from one receiver can no longer delete the activity needed by its own retry or other pending receivers.
• Structured delivery diagnostics: Logs now include task UUID, activity storage ID, activity/object/actor identifiers, origin domain, receiver domain, attempt number, remaining retries, and body SHA-256.
• Delivery timing details: Each attempt records elapsed processing time and the scheduled time or delay for the next retry.
• Improved HTTP failure evidence: Logs capture HTTP status codes, classified error types, and bounded response text from receivers, including useful errors such as 424 Failed Dependency.
• Safer diagnostic logging: Raw activity bodies, HTTP signatures, private keys, and unbounded remote responses are not written to logs.
• At-least-once recovery: A receiver that finishes processing after the relay times out may receive the same activity again during retry, allowing recovery from ambiguous timeout outcomes.
• Receiver-health tracking across retries: Successful and failed attempts update per-receiver delivery statistics and consecutive-failure state.
• Regression coverage: New tests verify retriable failure retention, successful later delivery, terminal cleanup, retry timing, metadata extraction, and bounded response handling.
• Operational observability: RC2 supports private health, readiness, and Prometheus metrics endpoints, now enabled locally in production on 127.0.0.1:9090.
• Preserved upgrade state: Deployment validation confirmed that the relay actor identity, private key, configuration, website settings, and all Redis logical data remained intact during the RC1-to-RC2 upgrade.

Changelog

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