04396eacd3
Previously, the slotsync worker relied on SIGINT for graceful shutdown during promotion. However, SIGINT is also used by the LOCK_TIMEOUT handler to cancel queries. Since the slotsync worker can lock catalog tables while parsing libpq tuples, this overlap caused it to ignore LOCK_TIMEOUT signals and potentially wait indefinitely on locks. This patch replaces the slotsync worker's SIGINT handler with StatementCancelHandler to correctly process query-cancel interrupts. Additionally, the startup process now uses SIGUSR1 to signal the slotsync worker to stop during promotion. The worker exits after detecting that the shared memory flag stopSignaled is set. Author: Hou Zhijie <houzj.fnst@fujitsu.com> Reviewed-by: shveta malik <shveta.malik@gmail.com> Reviewed-by: Chao Li <li.evan.chao@gmail.com> Reviewed-by: Amit Kapila <amit.kapila16@gmail.com> Backpatch-through: 17, here it was introduced Discussion: https://postgr.es/m/TY4PR01MB169078F33846E9568412D878C94A2A@TY4PR01MB16907.jpnprd01.prod.outlook.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.
Copyright and license information can be found in the file COPYRIGHT.
General documentation about this version of PostgreSQL can be found at https://www.postgresql.org/docs/devel/. In particular, information about building PostgreSQL from the source code can be found at https://www.postgresql.org/docs/devel/installation.html.
The latest version of this software, and related software, may be obtained at https://www.postgresql.org/download/. For more information look at our web site located at https://www.postgresql.org/.