On Wed, Aug 23, 2017 at 2:28 AM, Marco Nenciarini
<marco.nenciar...@2ndquadrant.it> wrote:
> I have noticed that after the 9.4.13 release PostgreSQL reliably fails
> to shutdown with smart and fast method if there is a running walsender.
> The postmaster continues waiting forever for the walsender termination.
> It works perfectly with all the other major releases.

Right. A similar issue has been reported yesterday:
Thanks for digging into the origin of the problem, I was lacking of
time yesterday to look at it.

> I bisected the issue to commit 1cdc0ab9c180222a94e1ea11402e728688ddc37d
> After some investigation I discovered that the instruction that sets
> got_SIGUSR2 was lost during the backpatch in the WalSndLastCycleHandler
> function.

That looks correct to me, only REL9_4_STABLE is impacted. This bug
breaks many use cases like failovers :(

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