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From: Andrey Borodin <[email protected]>
To: Michael Banck <[email protected]>
Cc: Heikki Linnakangas <[email protected]>
Cc: [email protected]
Cc: [email protected]
Cc: PostgreSQL mailing lists <[email protected]>
Subject: Re: Out-of-Cycle release? (was Re: BUG #19490: Streaming standby on 16.14 stops applying WAL on  MultiXactOffsetSLRU when primary is 16.8)
Date: Thu, 25 Jun 2026 15:14:46 +0500
Message-ID: <[email protected]> (raw)
In-Reply-To: <[email protected];lightning.p46.dedyn.io>
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> On 25 Jun 2026, at 14:30, Michael Banck <[email protected]> wrote:
> 
> If either the standby gets updated to the
> latest minor release first, or if somebody does PITR from a primary on an
> earlier release to an instance with the latest minor release, the
> standby/PITR deadlocks and just sits there.

A bit of clarification. To trigger this bug WAL must be generated by 16.10
or prior and replay must be done by latest release (16.14). And the WAL
trace must contain sufficient number of MultiXacts.

So far we had 3 or 4 reports on pgsql-bugs and few in chats.

But yeah, restoration from an old backup is a typical use case.


Best regards, Andrey Borodin.





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