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Logical replication 'ERROR: invalid memory alloc request size 1831213792' after upgrading to 15.13

Braulio Fdo Gonzalez <brauliofg@gmail.com>

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From: Braulio Fdo Gonzalez <brauliofg@gmail.com>
To: pgsql-bugs@lists.postgresql.org
Date: 2025-06-09T12:10:11Z
Lists: pgsql-bugs 
Hi, I'm having the issue with PG 15.13. We tried adding more memory
(logical_decoding_work_mem) to 5 GB, but it still doesn't work, and the
process "replicate" stops with the following error:

"CDC Fetch Failed: An unexpected connection error occurred while attempting
to replicate data from the source. Make sure your connection profile
settings are correct. If the problem persists, contact Google Support."
"ERROR: Invalid memory allocation request, size 1674007328."

We have another environment with PG 15.12, and it works perfectly.

This case has have relation with
https://www.postgresql.org/message-id/CALDaNm2sGfKsZwm8rG132N_i0AvyxkYu8TL46kNcx7KwAUABxA%40mail.gmail.com



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Same data as JSON: GET /api/v1/messages/:b64id/commits the thread's linked commits as JSON, with link sources. API reference →

  1. Fix re-distributing previously distributed invalidation messages during logical decoding.