MariaDB server is a community developed fork of MySQL server. Started by core members of the original MySQL team, MariaDB actively works with outside developers to deliver the most featureful, stable, and sanely licensed open SQL server in the industry.
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Jan Lindström 5d4adeabe2 MDEV-33278 Assertion failure in thd_get_thread_id at lock_wait_wsrep
Problem is that not all conflicting transactions have THD object.
Therefore, it must be checked that victim has THD
before it's identification is added to victim list as victim's
thread identification is later requested using thd_get_thread_id
function that requires that we have valid pointer to THD object
in trx->mysql_thd.

Victim might not have trx->mysql_thd in two cases:

(1) An incomplete transaction that was recovered from undo logs
on server startup (and not yet rolled back).

(2) Transaction that is in XA PREPARE state and whose client
connection was disconnected.

Neither of these can complete before lock_wait_wsrep()
releases lock_sys.latch.

(1) trx_t::commit_in_memory() is clearing both
trx_t::state and trx_t::is_recovered before it invokes
lock_release(trx_t*) (which would be blocked by the exclusive
lock_sys.latch that we are holding here). Hence, it is not
possible to write a debug assertion to document this scenario.

(2) If is in XA PREPARE state, it would eventually be rolled
back and the lock conflict would be resolved when an XA COMMIT
or XA ROLLBACK statement is executed in some other connection.
2024-02-27 20:55:54 +02:00
.github Merge 10.6 into 10.9 2023-05-19 15:11:06 +03:00
BUILD Merge branch '10.5' into 10.6 2023-12-17 11:20:43 +01:00
client Merge 10.6 into 10.11 2024-02-08 15:04:46 +02:00
cmake MDEV-33379 innodb_log_file_buffering=OFF causes corruption on bcachefs 2024-02-20 11:22:45 +02:00
dbug Merge 10.6 into 10.8 2023-02-10 13:43:53 +02:00
debian Merge 10.6 into 10.11 2024-02-14 16:12:53 +02:00
Docs Merge 10.4 into 10.5 2022-09-26 13:34:38 +03:00
extra Give warnings if one tries to use obsolete options with mariadb-backup 2024-02-27 20:55:54 +02:00
include RISC-V: use RDTIME instead of RDCYCLE 2024-02-12 13:59:04 +11:00
libmariadb@e714a67482 update C/C 2024-01-26 10:48:54 +01:00
libmysqld Merge branch '10.6' into 10.11 2024-02-01 18:36:14 +01:00
libservices Merge 10.6 into 10.11 2024-02-08 15:04:46 +02:00
man Merge 10.6 into 10.11 2024-02-14 16:12:53 +02:00
mysql-test MDEV-32932 Port backup features from ES 2024-02-27 20:55:54 +02:00
mysys MDEV-33379 innodb_log_file_buffering=OFF causes corruption on bcachefs 2024-02-20 11:22:45 +02:00
mysys_ssl Merge branch '10.4' into 10.5 2023-08-01 11:52:13 +02:00
plugin MDEV-33442 REPAIR TABLE corrupts UUIDs 2024-02-26 19:00:45 +04:00
randgen/conf
scripts Give warnings if one tries to use obsolete options with mariadb-backup 2024-02-27 20:55:54 +02:00
sql Some changes to prepare for updated maria-backup 2024-02-26 19:45:11 +02:00
sql-bench Updated sql-bench to run with PostgreSQL 14.9 2023-09-09 15:14:45 +03:00
sql-common Merge branch '10.5' into 10.6 2023-12-17 11:20:43 +01:00
storage MDEV-33278 Assertion failure in thd_get_thread_id at lock_wait_wsrep 2024-02-27 20:55:54 +02:00
strings Merge branch '10.6' into 10.11 2024-02-01 18:36:14 +01:00
support-files MDEV-30839: Add new options to mini-benchmark and fixes 2024-01-30 12:26:09 +11:00
tests Merge branch '10.6' into 10.11 2023-12-18 11:19:04 +01:00
tpool Merge 10.6 into 10.11 2023-11-22 18:14:11 +02:00
unittest Merge 10.6 into 10.11 2024-01-22 08:49:04 +02:00
vio Fix trivial spelling errors 2023-03-24 12:54:05 +11:00
win Merge branch '10.4' into 10.5 2024-01-31 17:32:53 +01:00
wsrep-lib@a5d95f0175 galera: wsrep-lib submodule update 2023-11-21 08:02:23 +01:00
zlib Merge branch 'zlib v1.3' into 10.4 2023-10-18 20:39:48 +02:00
.clang-format Merge 10.4 into 10.5 2019-12-27 21:17:16 +02:00
.gitattributes Merge branch '10.5' into 10.6 2022-02-03 17:01:31 +01:00
.gitignore Updated sql-bench to run with PostgreSQL 14.9 2023-09-09 15:14:45 +03:00
.gitlab-ci.yml Merge branch '10.6' into 10.9 2023-08-04 08:01:06 +02:00
.gitmodules Merge remote-tracking branch '10.4' into 10.5 2023-03-31 21:32:41 +02:00
appveyor.yml Merge 10.5 into 10.6 2022-07-27 17:52:37 +03:00
BUILD-CMAKE Minor spelling fixes in code comments, docs and output 2018-01-12 16:49:02 +02:00
CMakeLists.txt Merge 10.6 into 10.10 2023-10-14 13:36:11 +03:00
config.h.cmake MDEV-33379 innodb_log_file_buffering=OFF causes corruption on bcachefs 2024-02-20 11:22:45 +02:00
configure.cmake MDEV-33379 innodb_log_file_buffering=OFF causes corruption on bcachefs 2024-02-20 11:22:45 +02:00
CONTRIBUTING.md Remove mention of Freenode 2021-09-22 07:15:08 +02:00
COPYING Update FSF Address 2019-05-11 21:29:06 +03:00
CREDITS CREDITS: re-instate Tencent Cloud 2023-01-25 16:44:26 +11:00
INSTALL-SOURCE Update AskMonty and Atlassian references to MariaDB 2016-03-08 15:24:01 +02:00
INSTALL-WIN-SOURCE Update AskMonty and Atlassian references to MariaDB 2016-03-08 15:24:01 +02:00
KNOWN_BUGS.txt Changed some MySQL names in messages to MariaDB 2018-12-09 20:49:05 +02:00
README.md Remove mention of Freenode 2021-09-22 07:15:08 +02:00
THIRDPARTY Merge branch '10.6' into 10.11 2024-02-01 18:36:14 +01:00
VERSION bump the VERSION 2024-02-06 08:25:30 -05:00

Code status:

  • Appveyor CI status ci.appveyor.com

MariaDB: The open source relational database

MariaDB was designed as a drop-in replacement of MySQL(R) with more features, new storage engines, fewer bugs, and better performance.

MariaDB is brought to you by the MariaDB Foundation and the MariaDB Corporation. Please read the CREDITS file for details about the MariaDB Foundation, and who is developing MariaDB.

MariaDB is developed by many of the original developers of MySQL who now work for the MariaDB Corporation, the MariaDB Foundation and by many people in the community.

MySQL, which is the base of MariaDB, is a product and trademark of Oracle Corporation, Inc. For a list of developers and other contributors, see the Credits appendix. You can also run 'SHOW authors' to get a list of active contributors.

A description of the MariaDB project and a manual can be found at:

https://mariadb.org

https://mariadb.com/kb/en/

https://mariadb.com/kb/en/mariadb-vs-mysql-features/

https://mariadb.com/kb/en/mariadb-versus-mysql-compatibility/

https://mariadb.com/kb/en/new-and-old-releases/

Help

More help is available from the Maria Discuss mailing list https://launchpad.net/~maria-discuss, MariaDB's Zulip instance, https://mariadb.zulipchat.com/

Live QA for beginner contributors

MariaDB has a dedicated time each week when we answer new contributor questions live on Zulip. From 8:00 to 10:00 UTC on Mondays, and 10:00 to 12:00 UTC on Thursdays, anyone can ask any questions theyd like, and a live developer will be available to assist.

New contributors can ask questions any time, but we will provide immediate feedback during that interval.

Licensing


NOTE:

MariaDB is specifically available only under version 2 of the GNU General Public License (GPLv2). (I.e. Without the "any later version" clause.) This is inherited from MySQL. Please see the README file in the MySQL distribution for more information.

License information can be found in the COPYING file. Third party license information can be found in the THIRDPARTY file.


Bug Reports

Bug and/or error reports regarding MariaDB should be submitted at: https://jira.mariadb.org

For reporting security vulnerabilities see: https://mariadb.org/about/security-policy/

The code for MariaDB, including all revision history, can be found at: https://github.com/MariaDB/server