[pgpool-committers: 6235] pgpool: Fix signal unblock leak in failover.

[Tatsuo Ishii]

Fix signal unblock leak in failover.

When failover event occurs, register_node_operation_request() gets
called to en-queue failover/failback requests. If the request queue is
full, this function returns false with unlocking semaphore. But it
forgot to unblock signal mask. This leads to block all signals
including SITERM, which makes pgpool fail to shutdown.

Discussion: https://www.pgpool.net/pipermail/pgpool-hackers/2019-October/003449.html

Branch
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V4_0_STABLE

Details
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https://git.postgresql.org/gitweb?p=pgpool2.git;a=commitdiff;h=fed3d6b303547d98175094a8d593accbd4ce55b1

Modified Files
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src/main/pgpool_main.c | 1 +
1 file changed, 1 insertion(+)