Re: [HACKERS] Replication to Postgres 10 on Windows is broken

Andres Freund <andres(at)anarazel(dot)de> writes:
> On 2017-08-11 18:11:03 +0530, Augustine, Jobin wrote:
>> Appears that patch is not helping.

> That's too bad. Any chance you could install
> https://docs.microsoft.com/en-us/sysinternals/downloads/procmon and
> activate monitoring just for that phase? I think it can export to a text
> file...

It strikes me that maybe the misuse of io_flag could be contributing
to this: if the walreceiver process's latch were set, we'd end up calling
PQconnectPoll before the socket had necessarily come ready, which would
produce the described symptom. That's grasping at straws admittedly,
because I'm not sure why the walreceiver process's latch would be set
at this point; but it seems like we ought to test a version of the patch
that we believe correct before deciding that we still have a problem.

To move things along, here's a corrected patch --- Jobin, please test.

regards, tom lane