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If a test sends a notice just before blocking, it's possible on slow machines for isolationtester to detect the blocked state before it's consumed the notice. (For this to happen, the notice would have to arrive after isolationtester has waited for data for 10ms, so on fast/lightly-loaded machines it's hard to reproduce the failure.) But, if we have seen the backend as blocked, it's certainly already sent any notices it's going to send. Therefore, one more round of PQconsumeInput and PQisBusy should be enough to collect and process any such notices. This appears to explain the instability noted in commit ebd499282, so undo the hack therein to not print notices from insert-conflict-specconflict. Patch by me, diagnosis by Andres Freund. Discussion: https://postgr.es/m/14616.1564251339@sss.pgh.pa.us
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/.