BUG #18800: Error while using pg_combinebackup

From: PG Bug reporting form <noreply(at)postgresql(dot)org>
To: pgsql-bugs(at)lists(dot)postgresql(dot)org
Cc: james(dot)inform(at)pharmapp(dot)de
Subject: BUG #18800: Error while using pg_combinebackup
Date: 2025-02-07 23:30:49
Message-ID: 18800-8b51806e266e3ffa@postgresql.org
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The following bug has been logged on the website:

Bug reference: 18800
Logged by: James Inform
Email address: james(dot)inform(at)pharmapp(dot)de
PostgreSQL version: 17.2
Operating system: Linux Debian
Description:

I use pg_combinebackup with --dry-run to check an incremental backup. So far
everything went fine for weeks but know I get the following error message:

/opt/pg/bin/pg_combinebackup --dry-run -o /exchange/recover
./20250117_235000_full ./20250208_001500_incremental

pg_combinebackup: error: file
"./20250208_001500_incremental/base/4043490/INCREMENTAL.4048177" has
truncation block length 243767 in excess of segment size 131072
pg_combinebackup: removing contents of output directory
"/exchange/recover"

What can I do to narrow the issue down or get around this error?

I use multiple PostgreSQL installations and I only encounter this of one
installation.
Can a somehow corrupt storage be the reason?

Cheers,
James

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