Re: logical replication and SIGHUP

From: Michael Paquier <michael(dot)paquier(at)gmail(dot)com>
To: Noah Misch <noah(at)leadboat(dot)com>
Cc: peter(dot)eisentraut(at)2ndquadrant(dot)com, Fujii Masao <masao(dot)fujii(at)gmail(dot)com>, PostgreSQL-development <pgsql-hackers(at)postgresql(dot)org>
Subject: Re: logical replication and SIGHUP
Date: 2017-04-10 03:20:17
Message-ID: CAB7nPqRa1s627kgXVXSaZ4Co22bd52rvK5QqVVs-y6y9qgrY8w@mail.gmail.com
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On Mon, Apr 10, 2017 at 11:41 AM, Noah Misch <noah(at)leadboat(dot)com> wrote:
> On Thu, Apr 06, 2017 at 02:21:29AM +0900, Fujii Masao wrote:
>> Both launcher and worker don't handle SIGHUP signal and cannot
>> reload the configuration. I think that this is a bug. Will add this as
>> an open item barring objection.
>
> [Action required within three days. This is a generic notification.]
>
> The above-described topic is currently a PostgreSQL 10 open item. Peter,
> since you committed the patch believed to have created it, you own this open
> item. If some other commit is more relevant or if this does not belong as a
> v10 open item, please let us know. Otherwise, please observe the policy on
> open item ownership[1] and send a status update within three calendar days of
> this message. Include a date for your subsequent status update. Testers may
> discover new open items at any time, and I want to plan to get them all fixed
> well in advance of shipping v10. Consequently, I will appreciate your efforts
> toward speedy resolution. Thanks.
>
> [1] https://www.postgresql.org/message-id/20170404140717.GA2675809%40tornado.leadboat.com

After more review, I think that got_SIGTERM should be of type volatile
sig_atomic_t in launcher.c or that's not signal-safe. I think as well
that for correctness errno should be saved as SetLatch() is called and
restored afterwards. Please find attached a patch to address all that.
--
Michael
VMware vCenter Server
www.vmware.com

Attachment Content-Type Size
logirep-sighup.patch application/octet-stream 3.4 KB

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