Message-ID: <cb6770d34ab64200fa6628e23923a7d16a8c768f.camel@cybertec.at>
Subject: Re: Bug report - pg_upgrade tool seems to have a race condition
 when trying to delete a pg_wal file
From: Laurenz Albe <laurenz.albe@cybertec.at>
To: Waka Ranai <wakadotranai@gmail.com>, pgsql-bugs@lists.postgresql.org
Date: Wed, 03 Jul 2024 10:44:30 +0200
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On Tue, 2024-07-02 at 11:57 +0200, Waka Ranai wrote:
> > command: "C:/Program Files/PostgreSQL/15/bin/pg_resetwal" -f -x 3466214=
 "C:/Program Files/PostgreSQL/15/data" >> "C:/Program Files/PostgreSQL/15/d=
ata/pg_upgrade_output.d/20>
> > pg_resetwal: error: could not delete file "pg_wal/000000010000000000000=
001": No such file or directory
>
> Hi again, I eventually found out that Cortex XDR was also installed on th=
e system,
> but even after uninstalling it, I'm still=C2=A0faced=C2=A0with the same i=
ssue. I try to monitor
> the resources that might have a handle on the file, but the only ones sho=
wn are from
> postgres (one from postgres.exe and one from pg_resetwal). I did the moni=
toring with
> the bundled Resource=C2=A0Monitor of Microsoft, do you have any recommend=
ations for another
> monitoring tool with automatic scanning maybe ?

I am not a Windows person; sorry.

> How could I make sure that the issue is not due to an internal postgres p=
rocess ?

No idea - but the problem only happens for you, and as you say, it happens
always.  Why would PostgreSQL do something else on your system only?

> Did you consider not failing the upgrade if the file cannot be deleted ? =
What would
> be the problems, if any, in that use case ?

Should PostgreSQL be resilient to important files being removed from under =
it?
I think not...

Yours,
Laurenz Albe