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References: <2e556bbdbe6ccac93ecb6cfbb5a815059ff5aad2.camel@gmail.com>
In-Reply-To: <2e556bbdbe6ccac93ecb6cfbb5a815059ff5aad2.camel@gmail.com>
From: Alexander Kukushkin <cyberdemn@gmail.com>
Date: Thu, 7 May 2026 19:51:27 +0200
Message-ID: <CAFh8B=n57ZPGPAewHNmQ093DcY-+Nr_LQiY4W7-4RfXYoz5-XA@mail.gmail.com>
Subject: Re: untracked child process (PID XXXXX) exited with exit code 120
To: Torsten Krah <krah.tm@gmail.com>
Cc: pgsql-general@lists.postgresql.org
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My guess would be that the postmaster in your container is running with
PID=1.
The unexpected process was probably started by docker entrypoint before it
did exec postgres [...].
As a result, this subprocess became a direct child of the postmaster and we
got the problem.

The most common solution is to avoid running postmaster with PID=1.
There are two options available:
1. dumb-init
2. start container using "docker run --init [...]"

On Thu, 7 May 2026 at 19:37, Torsten Krah <krah.tm@gmail.com> wrote:

> Hi,
>
> I am running PostgreSQL 18.3 (Debian 18.3-1.pgdg13+1) (docker image)
> and found this in my database logs the other day:
>
> 2026-05-07 18:39:13.947 CEST [1] LOG:  untracked child process (PID 33254)
> exited with exit code 120
> 2026-05-07 18:39:13.947 CEST [1] LOG:  terminating any other active server
> processes
> 2026-05-07 18:39:14.077 CEST [1] LOG:  all server processes terminated;
> reinitializing
>
>
> Anyone an idea about that untracked child process and what exit code
> 120 of that process would mean / want to tell me?
>
> Thanks.
>
> Torsten
>
> PS: I used https://www.postgresql.org/search/ , but was unsuccessful so
> far to get any hints on this, but maybe I just did not find the correct
> question yet ;).
>
>
>
>

-- 
Regards,
--
Alexander Kukushkin

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<div dir=3D"ltr"><div>My guess would be that the postmaster in your contain=
er is running with PID=3D1.</div><div>The unexpected process was probably s=
tarted by docker entrypoint before it did exec postgres [...].</div><div>As=
 a result, this subprocess became a direct child of the postmaster and we g=
ot the problem.</div><div><br></div><div>The most common solution is to avo=
id running postmaster with PID=3D1.</div><div>There are two options availab=
le:</div><div>1. dumb-init</div><div>2. start container using &quot;docker =
run=C2=A0--init [...]&quot;</div></div><br><div class=3D"gmail_quote gmail_=
quote_container"><div dir=3D"ltr" class=3D"gmail_attr">On Thu, 7 May 2026 a=
t 19:37, Torsten Krah &lt;<a href=3D"mailto:krah.tm@gmail.com">krah.tm@gmai=
l.com</a>&gt; wrote:<br></div><blockquote class=3D"gmail_quote" style=3D"ma=
rgin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:=
1ex">Hi,<br>
<br>
I am running PostgreSQL 18.3 (Debian 18.3-1.pgdg13+1) (docker image)<br>
and found this in my database logs the other day:<br>
<br>
2026-05-07 18:39:13.947 CEST [1] LOG:=C2=A0 untracked child process (PID 33=
254) exited with exit code 120<br>
2026-05-07 18:39:13.947 CEST [1] LOG:=C2=A0 terminating any other active se=
rver processes<br>
2026-05-07 18:39:14.077 CEST [1] LOG:=C2=A0 all server processes terminated=
; reinitializing<br>
<br>
<br>
Anyone an idea about that untracked child process and what exit code<br>
120 of that process would mean / want to tell me?<br>
<br>
Thanks.<br>
<br>
Torsten<br>
<br>
PS: I used <a href=3D"https://www.postgresql.org/search/" rel=3D"noreferrer=
" target=3D"_blank">https://www.postgresql.org/search/</a> , but was unsucc=
essful so<br>
far to get any hints on this, but maybe I just did not find the correct<br>
question yet ;).<br>
<br>
<br>
<br>
</blockquote></div><div><br clear=3D"all"></div><br><span class=3D"gmail_si=
gnature_prefix">-- </span><br><div dir=3D"ltr" class=3D"gmail_signature"><d=
iv dir=3D"ltr"><div>Regards,</div><div>--</div><div>Alexander Kukushkin<br>=
</div></div></div>

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