postgresql

mirror of https://github.com/postgres/postgres.git synced 2026-03-09 01:31:22 -04:00

History

Michael Paquier 595b9cba2a Fix timeline assignment in checkpoints with 2PC transactions Any transactions found as still prepared by a checkpoint have their state data read from the WAL records generated by PREPARE TRANSACTION before being moved into their new location within pg_twophase/. While reading such records, the WAL reader uses the callback read_local_xlog_page() to read a page, that is shared across various parts of the system. This callback, since `1148e22a`, has introduced an update of ThisTimeLineID when reading a record while in recovery, which is potentially helpful in the context of cascading WAL senders. This update of ThisTimeLineID interacts badly with the checkpointer if a promotion happens while some 2PC data is read from its record, as, by changing ThisTimeLineID, any follow-up WAL records would be written to an timeline older than the promoted one. This results in consistency issues. For instance, a subsequent server restart would cause a failure in finding a valid checkpoint record, resulting in a PANIC, for instance. This commit changes the code reading the 2PC data to reset the timeline once the 2PC record has been read, to prevent messing up with the static state of the checkpointer. It would be tempting to do the same thing directly in read_local_xlog_page(). However, based on the discussion that has led to `1148e22a`, users may rely on the updates of ThisTimeLineID when a WAL record page is read in recovery, so changing this callback could break some cases that are working currently. A TAP test reproducing the issue is added, relying on a PITR to precisely trigger a promotion with a prepared transaction still tracked. Per discussion with Heikki Linnakangas, Kyotaro Horiguchi, Fujii Masao and myself. Author: Soumyadeep Chakraborty, Jimmy Yih, Kevin Yeap Discussion: https://postgr.es/m/CAE-ML+_EjH_fzfq1F3RJ1=XaaNG=-Jz-i3JqkNhXiLAsM3z-Ew@mail.gmail.com Backpatch-through: 10		2021-03-22 08:30:53 +09:00
..
authentication	Update copyright for 2021	2021-01-02 13:06:25 -05:00
examples	libpq: Remove deprecated connection parameters authtype and tty	2021-03-09 15:01:22 +01:00
isolation	Fix permission checks on constraint violation errors on partitions.	2021-02-08 11:01:51 +02:00
kerberos	Don't clobber the calling user's credentials cache in Kerberos test.	2021-01-25 14:53:13 -05:00
ldap	Update copyright for 2021	2021-01-02 13:06:25 -05:00
locale	Clean up after tests in src/test/locale/.	2020-11-28 16:08:36 -05:00
mb	Fix MB regression tests for WAL-logging of hash indexes.	2017-03-15 07:25:36 -04:00
modules	Suppress various new compiler warnings.	2021-03-21 11:50:43 -04:00
perl	Add end-to-end testing of pg_basebackup's tar-format output.	2021-03-17 14:52:55 -04:00
recovery	Fix timeline assignment in checkpoints with 2PC transactions	2021-03-22 08:30:53 +09:00
regress	Make compression.sql regression test independent of default.	2021-03-21 16:26:44 -04:00
ssl	Revert changes for SSL compression in libpq	2021-03-10 09:35:42 +09:00
subscription	Remove the unnecessary PrepareWrite in pgoutput.	2021-02-16 07:26:50 +05:30
Makefile	Introduce --with-ssl={openssl} as a configure option	2021-02-01 19:19:44 +09:00
README	Remove the option to build thread_test.c outside configure.	2020-10-21 12:08:48 -04:00

README

PostgreSQL tests
================

This directory contains a variety of test infrastructure as well as some of the
tests in PostgreSQL. Not all tests are here -- in particular, there are more in
individual contrib/ modules and in src/bin.

Not all these tests get run by "make check". Check src/test/Makefile to see
which tests get run automatically.

authentication/
  Tests for authentication (but see also below)

examples/
  Demonstration programs for libpq that double as regression tests via
  "make check"

isolation/
  Tests for concurrent behavior at the SQL level

kerberos/
  Tests for Kerberos/GSSAPI authentication and encryption

ldap/
  Tests for LDAP-based authentication

locale/
  Sanity checks for locale data, encodings, etc

mb/
  Tests for multibyte encoding (UTF-8) support

modules/
  Extensions used only or mainly for test purposes, generally not suitable
  for installing in production databases

perl/
  Infrastructure for Perl-based TAP tests

recovery/
  Test suite for recovery and replication

regress/
  PostgreSQL's main regression test suite, pg_regress

ssl/
  Tests to exercise and verify SSL certificate handling

subscription/
  Tests for logical replication