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Date: Tue, 28 Aug 2018 18:42:40 +0200
From: Christoph Berg <myon@debian.org>
To: Jorge Torralba <jorge.torralba@gmail.com>
Cc: pgsql-admin@postgresql.org
Subject: Re: Index corruption after pg_basebackup
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Re: Jorge Torralba 2018-08-28 <CACut7uRx72_R-nGOdOdnTSYCGGdKZ_TfsSghCb35+deF3s-4nw@mail.gmail.com>
> ERROR:  failed to re-find parent key in index "myindex" for deletion target
> page 851753

Which data type is that, and which LC_COLLATE setting is used?

If it's text (or similar), there's a known incompatibility with
de_DE.UTF-8 in different glibc versions. Possibly other locales and
libcs are affected as well.

Christoph