A service starts refusing connections with 'too many open files' after about six hours, every time. Find it.

Raising the limit buys hours and proves nothing. The six-hour periodicity is the diagnosis: something is opening descriptors on a code path that never closes them.

Updated Sep 2026 · Grounded in researched DevOps, SRE and platform engineering interview loops, written to a senior-engineer editorial bar, and never padded to hit a word count.

Raising the limit buys hours and proves nothing. The six-hour periodicity is the diagnosis: something is opening descriptors on a code path that never closes them.

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