504 Gateway Timeout

The gateway server didn't receive a timely response from the upstream server. Common with slow backends behind nginx.

Status Code504
NameGateway Timeout
CategoryServer Error
MeaningThe gateway server didn't receive a timely response from the upstream server. Common with slow backends behind nginx.

Common Causes

Slow backend — database query or API call taking too long

Proxy timeout too short — increase nginx proxy_read_timeout

Related Status Codes

500
Internal Server Error502
Bad Gateway503
Service Unavailable

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