[pgpool-committers: 7436] pgpool: Fix segfault in snapshot isolation mode.

[Tatsuo Ishii]

Fix segfault in snapshot isolation mode.

If one DB nodes goes down, pgpool segfaulted in the mode. This
happened in si_get_snapshot(). This was caused because it did not
check whether DB node is alive or not.

Branch
------
V4_2_STABLE

Details
-------
https://git.postgresql.org/gitweb?p=pgpool2.git;a=commitdiff;h=d479a463a56087f820857788f1dcce6ce601e20d

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