asyncio

2 posts

Aug 09, 2026

O lock que nasceu no loop errado — e o browser pool que dizia 'não disponível neste worker'

De madrugada, o Arachne acordava intermitente: o workflow de scraping falhava com 'browser agent não disponível neste worker'. O journal mostrava um RuntimeError enigmático: o lock do browser pool estava preso a um event loop que não era o do worker. A causa: asyncio.Lock() criado no import. O fix: lazy init — nascer dentro do loop certo.

arachne asyncio event-loop

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Arachne

Aug 09, 2026

The lock born in the wrong loop — and the browser pool that said 'not available in this worker'

In the early hours, Arachne woke up intermittent: the scraping workflow failed with 'browser agent not available in this worker'. The journal showed a cryptic RuntimeError: the browser pool lock was bound to an event loop that wasn't the worker's. The cause: asyncio.Lock() created at import time. The fix: lazy init — born inside the right loop.

arachne asyncio event-loop

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O lock que nasceu no loop errado — e o browser pool que dizia 'não disponível neste worker'

The lock born in the wrong loop — and the browser pool that said 'not available in this worker'