[pgpool-hackers: 4208] Deal with idle_session_timeout

Tatsuo Ishii ishii at sraoss.co.jp
Wed Oct 26 13:07:26 JST 2022


I have found an issue with idle_session_timeout which was introduced
in PostgreSQL 14.0.  If this parameter is enabled in postgresql.conf
and the timeout fires, Pgpool-II triggers failover if
failover_on_backend_error is on (the default). This is not good.

This is a similar issue fixed in:
In the commit we dealt with idle-in-transaction timeout.

Attached patch fixes the issue in the same direction as the commit
above: add detect_idle_session_timeout_error() to detect the error
code for idle_session_timeout. If the error is detected, Pgpool-II
returns the error code to frondend as a fatal error and disconnects
the session.

Best reagards,
Tatsuo Ishii
English: http://www.sraoss.co.jp/index_en/
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