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postgresql/src/test/subscription
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Michael Paquier 52a1df85f2 Fix race condition in subscription TAP test 021_twophase 
The test did not wait for all the subscriptions to have caught up when
dropping the subscription "tab_copy".  In a slow environment, it could
be possible for the replay of the COMMIT PREPARED transaction "mygid"
to not be confirmed yet, causing one prepared transaction to be left
around before moving to the next steps of the test.

One failure noticed is a transaction found in pg_prepared_xacts for the
cases where copy_data = false and two_phase = true, but there should be
none after dropping the subscription.

As an extra safety measure, a check is added before dropping the
subscription, scanning pg_prepared_xacts to make sure that no prepared
transactions are left once both subscriptions have caught up.

Issue introduced by a8fd13cab0, fixing a problem similar to
eaf5321c35.

Per buildfarm member kestrel.

Author: Vignesh C <vignesh21@gmail.com>
Reviewed-by: Amit Kapila <amit.kapila16@gmail.com>
Discussion: https://postgr.es/m/CALDaNm329QaZ+bwU--bW6GjbNSZ8-38cDE8QWofafub7NV67oA@mail.gmail.com
Backpatch-through: 15
2025-05-26 17:28:37 +09:00
..
t Fix race condition in subscription TAP test 021_twophase 2025-05-26 17:28:37 +09:00
.gitignore Logical replication 2017-01-20 09:04:49 -05:00
Makefile Update copyright for 2025 2025-01-01 11:21:55 -05:00
meson.build Detect and Log multiple_unique_conflicts type conflict. 2025-03-24 12:30:44 +05:30
README Doc: improve README files associated with TAP tests. 2021-10-31 18:12:44 -04:00

README 

src/test/subscription/README

Regression tests for subscription/logical replication
=====================================================

This directory contains a test suite for subscription/logical replication.

Running the tests
=================

NOTE: You must have given the --enable-tap-tests argument to configure.
Also, to use "make installcheck", you must have built and installed
contrib/hstore in addition to the core code.

Run
    make check
or
    make installcheck
You can use "make installcheck" if you previously did "make install".
In that case, the code in the installation tree is tested.  With
"make check", a temporary installation tree is built from the current
sources and then tested.

Either way, this test initializes, starts, and stops several test Postgres
clusters.

See src/test/perl/README for more info about running these tests.