n8n errors / Connectivity
connect ECONNREFUSED 127.0.0.1:5432
Cause
The Postgres node cannot reach the database, typically because n8n is in Docker and the host is set to localhost/127.0.0.1 instead of the container name.
Fix
In Docker Compose, set the credential host to the Postgres service name (e.g. postgres), not localhost. Confirm port 5432 is exposed and pg_hba.conf/postgresql.conf allow remote connections from the n8n network. If using an SSH tunnel, upgrade to n8n v1.99.0 for the connection-pool fix.
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