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The test introduced by17b2d5ec75verifies that a WAL receiver survives across a timeline jump by searching the server logs for termination messages. However, it called restart() before the timeline switch, which kills the WAL receiver and may log the exact message being checked, hence failing the test. As TAP tests reuse the same log file across restarts, a rotate_logfile() is used before the restart so as the log matching check is not impacted by log entries generated by a previous shutdown. Recent changes to file handle inheritance altered I/O timing enough to make this fail consistently while testing another patch. While on it, this adds an extra check based on a PID comparison. This test may lead to false positives as it could be possible that the WAL receiver has processed a timeline jump before the initial PID is grabbed, but it should be good enough in most cases. Like17b2d5ec75, backpatch down to v13. Author: Bryan Green <dbryan.green@gmail.com> Co-authored-by: Xuneng Zhou <xunengzhou@gmail.com> Discussion: https://postgr.es/m/9d00b597-d64a-4f1e-802e-90f9dc394c70@gmail.com Backpatch-through: 13
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/.