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n8n errors / Connectivity

Unable to connect to Redis after trying to connect for 10s

platform: n8n / category: Connectivity

Cause

The n8n main/worker cannot reach Redis, commonly from an incorrect QUEUE_BULL_REDIS_HOST, a Docker network mismatch, or TLS issues.

Fix

Verify QUEUE_BULL_REDIS_HOST/PORT match the Redis service name and port and that both containers share a network. For TLS Redis, mount the CA cert and set QUEUE_BULL_REDIS_TLS=true with cert paths. If Redis has idle timeouts, set QUEUE_BULL_REDIS_TIMEOUT_THRESHOLD below the server timeout to reconnect proactively.

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