[pgpool-committers: 10206] 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
------
master

Details
-------
https://git.postgresql.org/gitweb?p=pgpool2.git;a=commitdiff;h=ab091663b09ef8c2d0a1841921597948c597444e

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