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This only happens if (1) the new standby has no WAL available locally, (2) the new standby is starting from the old timeline, (3) the promotion happened in the WAL segment from which the new standby is starting, (4) the timeline history file for the new timeline is available from the archive but the WAL files for are not (i.e. this is a race), (5) the WAL files for the new timeline are available via streaming, and (6) recovery_target_timeline='latest'. Commit ee994272ca50f70b53074f0febaec97e28f83c4e introduced this logic and was an improvement over the previous code, but it mishandled this case. If recovery_target_timeline='latest' and restore_command is set, validateRecoveryParameters() can change recoveryTargetTLI to be different from receiveTLI. If streaming is then tried afterward, expectedTLEs gets initialized with the history of the wrong timeline. It's supposed to be a list of entries explaining how to get to the target timeline, but in this case it ends up with a list of entries explaining how to get to the new standby's original timeline, which isn't right. Dilip Kumar and Robert Haas, reviewed by Kyotaro Horiguchi. Discussion: http://postgr.es/m/CAFiTN-sE-jr=LB8jQuxeqikd-Ux+jHiXyh4YDiZMPedgQKup0g@mail.gmail.com
PostgreSQL Database Management System ===================================== This directory contains the source code distribution of the PostgreSQL database management system. PostgreSQL is an advanced object-relational database management system that supports an extended subset of the SQL standard, including transactions, foreign keys, subqueries, triggers, user-defined types and functions. This distribution also contains C language bindings. PostgreSQL has many language interfaces, many of which are listed here: https://www.postgresql.org/download/ See the file INSTALL for instructions on how to build and install PostgreSQL. That file also lists supported operating systems and hardware platforms and contains information regarding any other software packages that are required to build or run the PostgreSQL system. Copyright and license information can be found in the file COPYRIGHT. A comprehensive documentation set is included in this distribution; it can be read as described in the installation instructions. The latest version of this software may be obtained at https://www.postgresql.org/download/. For more information look at our web site located at https://www.postgresql.org/.