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On Windows, a backend exiting resets its connection, and the client discards any data not yet read, including the FATAL message of a terminated backend. isolationtester polls one connection at a time, so when it waits on a different session the message can get lost, failing the permutation and the tests that run after it. wait_cleanup in injection_points (down to v17) and slot_creation_error in test_decoding (down to v15) have this pattern, and have been failing randomly in the buildfarm. Let's skip them on Windows. The cause of the instabilities is proving to be tricky to deal with, pointing for example at29992a6a50. This will be tackled later, perhaps with a backpatch (or perhaps with a HEAD-only solution), but it is difficult to be sure at this stage of the work. In theory,a8458f508ashould make a revert of29992a6a50(revert of a revert!) safe on WIN32. Note that278cdea6b9, that has introduced the isolation test slot_creation_error in test_decoding, has mentioned the potential output instability. Author: Zsolt Parragi <zsolt.parragi@percona.com> Author: Michael Paquier <michael@paquier.xyz> Discussion: https://postgr.es/m/CAN4CZFOoiKa9E4Gnh_OzLk3S5Z6RFyg_oY1e_WddCVYhkpTVow@mail.gmail.com Backpatch-through: 15
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/.