[pgpool-committers: 10201] 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
------
V4_1_STABLE

Details
-------
https://git.postgresql.org/gitweb?p=pgpool2.git;a=commitdiff;h=7a2e13dcefd5d5834029bb872348eedcebdc1d67

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