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From: Peter Röthlisberger <[email protected]>
To: [email protected]
Subject: undefined symbol: PQcancelStart
Date: Fri, 20 Jun 2025 13:49:41 +0200
Message-ID: <[email protected]> (raw)

Hello all,

Platform: Rocky Linux release 9.4 (Blue Onyx)

I try to migrate from version 16.7 to 17.5. When executing pg_upgrade —check I get the following:


could not load library "$libdir/dblink": ERROR:  could not load library "/opt/postgresql-17.5/lib/dblink.so": /opt/postgresql-17.5/lib/dblink.so: undefined symbol: PQcancelStart
In database: zen_dev1
In database: zen_prod2
could not load library "$libdir/postgres_fdw": ERROR:  could not load library "/opt/postgresql-17.5/lib/postgres_fdw.so": /opt/postgresql-17.5/lib/postgres_fdw.so: undefined symbol: PQcancelStart
In database: zen_dev1

I  tried hard to find a hint on the net. No success hence my first post here. I was able to execute the update on another server having the same OS.

Any help is highly appreciated 

Thanks: peter

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