Five Automation Lanes Failed for 63 Minutes Because Retries Ignored Failure Types

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Five automation lanes in an SNS automation environment experienced simultaneous failures on August 8–9, 2026, each repeatedly retrying without success for up to 63 minutes. Despite sharing similar symptoms in logs, the root causes were entirely different across lanes — including deterministic validation errors, content-triggered moderation blocks, and resource slot shortages. A script generating article titles kept producing a 63-character title against a 58-character limit, while an image generator exhausted all fallback prompt tiers against an unmovable moderation wall. A browser slot manager silently skipped jobs when no slots were free, leaving some accounts with zero activity for the day. The core problem was a one-size-fits-all retry loop that treated deterministic, conditional, and resource-contention failures identically, making it impossible to distinguish fixable errors from unfixable ones.

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