[pgpool-general: 5120] PGPool failover backend communication error clarification

Alfonso Subiotto Marqués alfonso.subiotto.marques at gmail.com
Mon Nov 14 05:16:12 JST 2016


I have a question regarding the fail_over_on_backend_error option,
specifically what exactly constitutes a backend communication error.
Consider a client connecting to a server through pgpool. If for some reason
a SQL error is returned by the server before a SQL connection is
established (e.g. an ErrorResponse during start-up, see
https://www.postgresql.org/docs/current/static/protocol-flow.html) would
this constitute a backend communication error and mark the server as down?
I assume that this would be the case during normal health check procedures.

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