[pgpool-committers: 8081] pgpool: Enhance SIGHLD handler of Pgpool-II main process.

[Tatsuo Ishii]

Enhance SIGHLD handler of Pgpool-II main process.

When Pgpool-II child is killed by SIGKILL signal, the SIGHLD handler
just emitted LOG level message as other signals.  But SIGKILL is an
important event, for example killed by OOM killer. So emit a WARNING
level message instead.

Per suggestion from Michail Alexakis.
Discussion: https://www.pgpool.net/pipermail/pgpool-general/2021-October/007808.html

Branch
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V4_2_STABLE

Details
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https://git.postgresql.org/gitweb?p=pgpool2.git;a=commitdiff;h=e633e7ec3754c7d751c308bd176c12f9e125550f

Modified Files
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src/main/pgpool_main.c | 5 ++++-
1 file changed, 4 insertions(+), 1 deletion(-)