[pgpool-committers: 10205] pgpool: Fix COPY hangs.

[Tatsuo Ishii]

Fix COPY hangs.

During COPY IN state (i.e. COPY FROM STDIN), frontend can send Flush
or Sync messages.  According to the F/B protocol specification, they
should be ignored but Pgpool-II treated as an invalid message and this
causes COPY hung.

Discussion: https://github.com/pgpool/pgpool2/issues/79
Backpatch-through: v4.1

Branch
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V4_5_STABLE

Details
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https://git.postgresql.org/gitweb?p=pgpool2.git;a=commitdiff;h=e99a70444166b210daa7bb9e8b3ba09144cec0fd

Modified Files
--------------
src/protocol/pool_proto_modules.c | 6 ++++++
1 file changed, 6 insertions(+)