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From: Tom Lane <tgl@sss.pgh.pa.us>
To: Peter Geoghegan <pg@bowt.ie>
Cc: sireesha <sireesha.padmini@gmail.com>
Cc: pgsql-admin@lists.postgresql.org
Subject: Re: Mutex error 22 - Postgres version 14
Date: Wed, 01 Feb 2023 19:18:55 -0500
Message-ID: <1435492.1675297135@sss.pgh.pa.us> (raw)
In-Reply-To: <CAH2-WzkG-yixQvpnJHE63Gx9yebo8vQFD=Hm1__C_fA_D0iscg@mail.gmail.com>
References: <CAAM4KK3_J1bpv6ZHgZiC8_zKNrCp1AA747qUFRaL13Qubf5VKw@mail.gmail.com>
	<1423181.1675289897@sss.pgh.pa.us>
	<CAAM4KK1PPc7coV80AZ6D_f=kDDC7qygnRqkXLemabj=y1Q=f=Q@mail.gmail.com>
	<1428133.1675292556@sss.pgh.pa.us>
	<CAH2-WzkG-yixQvpnJHE63Gx9yebo8vQFD=Hm1__C_fA_D0iscg@mail.gmail.com>

Peter Geoghegan <pg@bowt.ie> writes:
> On Wed, Feb 1, 2023 at 3:02 PM Tom Lane <tgl@sss.pgh.pa.us> wrote:
>>> 2023-01-24 02:35:45.833 PST [3424807] LOG:  PID 0 in cancel request did not
>>> match any process
>>> *Error locking mutex 22*

> I wonder if 22 might be EINVAL, which is one possible error code used
> by pthread_mutex_lock().

Maybe, but we still don't know what's reporting the error.

I tried searching for "Error locking mutex" in Debian Code Search,
and got several hits, but none of them match this exactly --- the
ones that offer any additional info present it as a string not a
number.

			regards, tom lane

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