Pitfalls of Concurrent Automated File Writing
Ok-Masterpiece-7614 · reddit · 2026-07-09
The author shares a bug encountered while running a multi-worker automation process: 10 workers writing to the same result file simultaneously caused one to overwrite another's content. The program threw no errors, resulting in silent data loss.
The solution was updated to have each worker write to an independent file first, which are then merged by a central coordinator. The post emphasizes that the true challenge of concurrent automation isn't speed, but rather resource contention issues that often remain hidden until it's too late.
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