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At the end of recovery, standby mode is turned off to re-fetch the last valid record from archive or pg_wal. Previously, if recovery target was reached and standby mode was turned off while the current WAL source was stream, recovery could try to retrieve WAL file containing the last valid record unexpectedly from stream even though not in standby mode. This caused an assertion failure. That is, the assertion test confirms that WAL file should not be retrieved from stream if standby mode is not true. This commit moves back the current WAL source to archive if it's stream even though not in standby mode, to avoid that assertion failure. This issue doesn't cause the server to crash when built with assertion disabled. In this case, the attempt to retrieve WAL file from stream not in standby mode just fails. And then recovery tries to retrieve WAL file from archive or pg_wal. Back-patch to all supported branches. Author: Kyotaro Horiguchi Reviewed-by: Fujii Masao Discussion: https://postgr.es/m/20200227.124830.2197604521555566121.horikyota.ntt@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/.