On 2021/03/23 3:25, James Coleman wrote:
On Mon, Mar 22, 2021 at 1:49 PM Fujii Masao <masao.fu...@oss.nttdata.com> wrote:



On 2021/03/19 23:35, James Coleman wrote:
Here's an updated patch; I think I've gotten what Alvaro suggested.

Thanks for updating the patch! But I was thinking that our consensus is
something like the attached patch. Could you check this patch?

As far as I can tell (I might be missing something) your v5 patch does
the same thing, albeit with different code organization. It did catch
though that I'd neglected to add the DETAIL line as separate from the
errmsg line.

Is the attached (in the style of my v4, since I'm not following why we
need to move the standby determination logic into a new
CAC_NOCONSISTENT block) what you're thinking? Or is there something
else I'm missing?

I just did that to avoid adding more CAC_state. But basically it's
ok to check hot standby at either canAcceptConnections() or
ProcessStartupPacket().

                case CAC_STARTUP:
                        ereport(FATAL,
                                        (errcode(ERRCODE_CANNOT_CONNECT_NOW),
-                                        errmsg("the database system is starting 
up")));
+                                        errmsg("the database system is not 
accepting connections"),
+                                        errdetail("Consistent recovery state has 
not been yet reached.")));

Do you want to report this message even in crash recovery? Since crash
recovery is basically not so much related to "consistent recovery state",
at least for me the original message seems more suitable for crash recovery.

Also if we adopt this message, the server with hot_standby=off reports
"Consistent recovery state has not been yet reached." in PM_STARTUP,
but stops reporting this message at PM_RECOVERY even if the consistent
recovery state has not been reached yet. Instead, it reports "Hot standby
mode is disabled." at PM_RECOVERY. Isn't this transition of message confusing?

Regards,

--
Fujii Masao
Advanced Computing Technology Center
Research and Development Headquarters
NTT DATA CORPORATION


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