961553daf5
Previously, XactLockTableWait() and ConditionalXactLockTableWait() could enter a non-interruptible loop when they successfully acquired a lock on a transaction but the transaction still appeared to be running. Since this loop continued until the transaction completed, it could result in long, uninterruptible waits. Although this scenario is generally unlikely since XactLockTableWait() and ConditionalXactLockTableWait() can basically acquire a transaction lock only when the transaction is not running, it can occur in a hot standby. In such cases, the transaction may still appear active due to the KnownAssignedXids list, even while no lock on the transaction exists. For example, this situation can happen when creating a logical replication slot on a standby. The cause of the non-interruptible loop was the absence of CHECK_FOR_INTERRUPTS() within it. This commit adds CHECK_FOR_INTERRUPTS() to the loop in both functions, ensuring they can be interrupted safely. Back-patch to all supported branches. Author: Kevin K Biju <kevinkbiju@gmail.com> Reviewed-by: Fujii Masao <masao.fujii@gmail.com> Discussion: https://postgr.es/m/CAM45KeELdjhS-rGuvN=ZLJ_asvZACucZ9LZWVzH7bGcD12DDwg@mail.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.
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/.