On 19.12.23 17:29, Tom Lane wrote:
IMO, we aren't really going to get a massive payoff from this with
the current backtrace output; it's just not detailed enough. It's
better than nothing certainly, but to really move the goalposts
we'd need something approaching gdb's "bt full" output. I wonde
On Wed, 20 Dec 2023 at 11:30, Andres Freund wrote:
> Tom's patch imo doesn't really introduce anything really new - we already deal
> with EOF that way in other places. And it's how the standard APIs deal with
> the issue. I'd not design it this way on a green field, but given the current
> state
Hi,
On 2023-12-20 10:08:42 +0100, Jelte Fennema-Nio wrote:
> On Sun, 10 Dec 2023 at 00:14, Tom Lane wrote:
> > I'm not actually sure that the fe-secure.c part of v3-0002 is
> > necessary, because it's guarding plain recv(2) which really shouldn't
> > return -1 without setting errno. Still, it's
On Tue, 19 Dec 2023 at 17:12, Robert Haas wrote:
> On Fri, Dec 8, 2023 at 1:34 PM Andres Freund wrote:
> > Oh, very much agreed. But I suspect we won't quickly do the same for
> > out-of-core extensions...
>
> I feel like this is a problem that will sort itself out just fine. The
> rules about us
On Sun, 10 Dec 2023 at 00:14, Tom Lane wrote:
> I'm not actually sure that the fe-secure.c part of v3-0002 is
> necessary, because it's guarding plain recv(2) which really shouldn't
> return -1 without setting errno. Still, it's a pretty harmless
> addition.
v3-0002 seems have a very similar goa
On Tue, Dec 19, 2023 at 11:29 AM Tom Lane wrote:
> IMO, we aren't really going to get a massive payoff from this with
> the current backtrace output; it's just not detailed enough. It's
> better than nothing certainly, but to really move the goalposts
> we'd need something approaching gdb's "bt f
Robert Haas writes:
> The last change we made in this area that, at least for me, massively
> improved debuggability was the change to log the current query string
> when a backend crashes. That's such a huge help; I can't imagine going
> back to the old way where you had basically no idea what ma
On Fri, Dec 8, 2023 at 1:34 PM Andres Freund wrote:
> Oh, very much agreed. But I suspect we won't quickly do the same for
> out-of-core extensions...
I feel like this is a problem that will sort itself out just fine. The
rules about using ereport() and elog() could probably be better
documented
On 08.12.23 19:14, Andres Freund wrote:
FWIW, I did some analysis on aggregated logs on a larger number of machines,
and it does look like that'd be a measurable increase in log volume. There are
a few voluminous internal errors in core, but the bigger issue is
extensions. They are typically much
Andres Freund writes:
> On 2023-12-09 12:41:30 -0500, Tom Lane wrote:
>> On further reflection I realized that you're right so far as the SSL
>> code path goes, because SSL_write() can involve physical reads as well
>> as writes, so at least in principle it's possible that we'd see EOF
>> reported
Hi,
On 2023-12-09 12:41:30 -0500, Tom Lane wrote:
> I wrote:
> > Andres Freund writes:
> >> I was wondering about that too. But if we do so, why not also do it for
> >> writes?
>
> > Writes don't act that way, do they? EOF on a pipe gives you an error,
> > not silently reporting that zero bytes
I wrote:
> Andres Freund writes:
>> I was wondering about that too. But if we do so, why not also do it for
>> writes?
> Writes don't act that way, do they? EOF on a pipe gives you an error,
> not silently reporting that zero bytes were written and leaving you
> to retry indefinitely.
On furthe
Hi,
On 2023-12-08 19:39:20 -0500, Tom Lane wrote:
> Andres Freund writes:
> > On 2023-12-08 17:29:45 -0500, Tom Lane wrote:
> >> Agreed. I think we want to do that after the initial handshake,
> >> too, so maybe as attached.
>
> > I was wondering about that too. But if we do so, why not also do
Andres Freund writes:
> On 2023-12-08 17:29:45 -0500, Tom Lane wrote:
>> Agreed. I think we want to do that after the initial handshake,
>> too, so maybe as attached.
> I was wondering about that too. But if we do so, why not also do it for
> writes?
Writes don't act that way, do they? EOF on
Hi,
On 2023-12-08 17:35:26 -0500, Tom Lane wrote:
> Andres Freund writes:
> > I thought it'd be nice to have a test for this, particularly because it's
> > not
> > clear that the behaviour is consistent across openssl versions.
>
> Perhaps, but ...
>
> > To deal with that, I changed the test t
On 2023-12-08 17:29:45 -0500, Tom Lane wrote:
> Andres Freund writes:
> >> I think I figured it it out. Looks like we need to translate a closed
> >> socket
> >> (recvfrom() returning 0) to ECONNRESET or such.
>
> > Seems like we should just treat errno == 0 as a reason to emit the "EOF
> > dete
Andres Freund writes:
> I thought it'd be nice to have a test for this, particularly because it's not
> clear that the behaviour is consistent across openssl versions.
Perhaps, but ...
> To deal with that, I changed the test to instead check if "not accept SSL
> connection: Success" is not logge
Andres Freund writes:
>> I think I figured it it out. Looks like we need to translate a closed socket
>> (recvfrom() returning 0) to ECONNRESET or such.
> Seems like we should just treat errno == 0 as a reason to emit the "EOF
> detected" message?
Agreed. I think we want to do that after the in
Hi,
On 2023-12-08 11:33:16 -0800, Andres Freund wrote:
> On 2023-12-08 10:51:01 -0800, Andres Freund wrote:
> > On 2023-12-08 13:46:07 -0500, Tom Lane wrote:
> > > Andres Freund writes:
> > > > On 2023-12-08 13:23:50 -0500, Tom Lane wrote:
> > > >> Hmm, don't suppose you have a way to reproduce t
Hi,
On 2023-12-08 10:51:01 -0800, Andres Freund wrote:
> On 2023-12-08 13:46:07 -0500, Tom Lane wrote:
> > Andres Freund writes:
> > > On 2023-12-08 13:23:50 -0500, Tom Lane wrote:
> > >> Hmm, don't suppose you have a way to reproduce that?
> >
> > > After a bit of trying, yes. I put an abort()
Hi,
On 2023-12-08 13:46:07 -0500, Tom Lane wrote:
> Andres Freund writes:
> > On 2023-12-08 13:23:50 -0500, Tom Lane wrote:
> >> Hmm, don't suppose you have a way to reproduce that?
>
> > After a bit of trying, yes. I put an abort() into pgtls_open_client(),
> > after
> > initialize_SSL(). Con
Andres Freund writes:
> On 2023-12-08 13:23:50 -0500, Tom Lane wrote:
>> Hmm, don't suppose you have a way to reproduce that?
> After a bit of trying, yes. I put an abort() into pgtls_open_client(), after
> initialize_SSL(). Connecting does result in:
> LOG: could not accept SSL connection: Suc
Hi,
On 2023-12-08 13:23:50 -0500, Tom Lane wrote:
> Andres Freund writes:
> > On 2023-12-08 10:05:09 -0500, Tom Lane wrote:
> >> ... there was already opinion upthread that this should be on by
> >> default, which I agree with. You shouldn't be hitting cases like
> >> this commonly (if so, they'
Andres Freund writes:
> On 2023-12-08 10:05:09 -0500, Tom Lane wrote:
>> ... there was already opinion upthread that this should be on by
>> default, which I agree with. You shouldn't be hitting cases like
>> this commonly (if so, they're bugs to fix or the errcode should be
>> rethought), and th
Hi,
On 2023-12-08 10:05:09 -0500, Tom Lane wrote:
> Peter Eisentraut writes:
> > One possible question for discussion is whether the default for this
> > should be off, on, or possibly something like on-in-assert-builds.
> > (Personally, I'm happy to turn it on myself at run time, but everyone
>
Peter Eisentraut writes:
> Here is a patch to play with.
Didn't read the patch yet, but ...
> One possible question for discussion is whether the default for this
> should be off, on, or possibly something like on-in-assert-builds.
> (Personally, I'm happy to turn it on myself at run time, but
_list = (char *) extra;
}
/*
base-commit: 7db01fbcefbd95a7c97afa128fab59f4a09b3ff1
--
2.43.0
From 06beed94067efaf5b93da5041048347fa22a4290 Mon Sep 17 00:00:00 2001
From: Peter Eisentraut
Date: Fri, 8 Dec 2023 14:04:53 +0100
Subject: [PATCH v1 2/2] Add GUC backtrace_on_internal_error
---
doc/src/sgml/config.sgml
Peter Eisentraut writes:
> Something else to note: I wrote the above code to check the error code;
> it doesn't check whether the original code write elog() or ereport().
> There are some internal errors that are written as ereport() now.
> Others might be changed from time to time; until now
backtrace_functions(edata->funcname))
+ ((edata->funcname &&
+ backtrace_functions &&
+ matches_backtrace_functions(edata->funcname)) ||
+ (edata->sqlerrcode == ERRCODE_INTERNAL_ERROR &&
+ backtrace_on_internal_error)))
set
Matthias van de Meent writes:
> On Tue, 5 Dec 2023 at 19:30, Robert Haas wrote:
>>> I think we should consider unconditionally emitting a backtrace when
>>> an elog() is hit, instead of requiring a GUC.
>> Perhaps this should be a GUC that defaults to LOG or ERROR.
> I can't speak for Nathan, b
On Tue, Dec 05, 2023 at 07:47:25PM +0100, Matthias van de Meent wrote:
> On Tue, 5 Dec 2023 at 19:30, Robert Haas wrote:
>> On Tue, Dec 5, 2023 at 1:28 PM Nathan Bossart
>> wrote:
>> > Perhaps this should be a GUC that defaults to LOG or ERROR.
>>
>> Why?
Sorry, I should've explained why in my
On Tue, Dec 5, 2023 at 1:47 PM Matthias van de Meent
wrote:
> I can't speak for Nathan, but my reason would be that I'm not in the
> habit to attach a debugger to my program to keep track of state
> progression, but instead use elog() during patch development. I'm not
> super stoked for getting my
On Tue, 5 Dec 2023 at 19:30, Robert Haas wrote:
>
> On Tue, Dec 5, 2023 at 1:28 PM Nathan Bossart
> wrote:
> > On Tue, Dec 05, 2023 at 01:16:22PM -0500, Robert Haas wrote:
> > > I think we should consider unconditionally emitting a backtrace when
> > > an elog() is hit, instead of requiring a GU
On Tue, Dec 5, 2023 at 1:28 PM Nathan Bossart wrote:
> On Tue, Dec 05, 2023 at 01:16:22PM -0500, Robert Haas wrote:
> > I think we should consider unconditionally emitting a backtrace when
> > an elog() is hit, instead of requiring a GUC. Or at least any elog()
> > that's not at a DEBUGn level. If
On Tue, Dec 05, 2023 at 01:16:22PM -0500, Robert Haas wrote:
> I think we should consider unconditionally emitting a backtrace when
> an elog() is hit, instead of requiring a GUC. Or at least any elog()
> that's not at a DEBUGn level. If the extra output annoys anybody, that
> means they're regular
On Tue, Dec 5, 2023 at 12:40 PM Nathan Bossart wrote:
> On Tue, Dec 05, 2023 at 11:55:05AM +0100, Peter Eisentraut wrote:
> > Would others find this useful?
>
> Yes. I think I would use this pretty frequently.
I think we should consider unconditionally emitting a backtrace when
an elog() is hit,
On Tue, Dec 05, 2023 at 11:55:05AM +0100, Peter Eisentraut wrote:
> Would others find this useful?
Yes. I think I would use this pretty frequently.
> Any other settings or variants in this area
> that should be considered while we're here?
IMO it would be nice to have a way to turn on backtrace
e)) ||
+ (edata->sqlerrcode == ERRCODE_INTERNAL_ERROR &&
+ backtrace_on_internal_error)))
set_backtrace(edata, 2);
/*
where backtrace_on_internal_error would be a GUC variable.
Would others find this useful? Any other settings or variants in this
area that should be considered while we're here?
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