Node.js Error Handling
summary
Shows concrete fixes: use bunion logging with unique error IDs and stored arguments so a user 500 page maps to the exact failure; wrap async APIs to intercept callbacks and attach method + args for visibility; treat errors as Error objects not strings so stacks serialize (shallow copy stack/name); use domains to route per-request uncaught exceptions and use cluster patterns to drain and restart because roughly 50% of production crashes come from forgotten null checks that crash the process.
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