Release Notes for MariaDB Enterprise Server 10.4.8-3
This page is part of MariaDB's MariaDB Documentation.
The parent of this page is: Release Notes for MariaDB Enterprise Server 10.4
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This third release of MariaDB Enterprise Server 10.4 is a maintenance release, including a variety of fixes.
MariaDB Enterprise Server 10.4.8-3 was released on 2019-09-30.
MariaDB Enterprise Audit plugin sends error to the client when auditing could not be started. When reloaded, wrong filter definitions will result in an error and the old cache filters will be used. (MENT-256)
Can result in data loss
Due to a race condition in InnoDB, an exclusive lock to an inserted record could be wrongly granted to multiple transactions when the INSERT transaction commits. This could lead to a server crash or data loss. (MDEV-15326)
INSERT...ON DUPLICATE KEY UPDATE, when there is more than one key, could result in inconsistent data between master and slave for replication mode MIXED and STATEMENT. This has been fixed for MIXED, but cannot be controlled by the replication for STATEMENT based replication.
Inconsistent Slaves need to be set up again from the Master. (MDEV-17614)
Wrong value on instantly added column can occur after DELETE and a following UPDATE of PRIMARY KEY. (MDEV-20066)
INSTANT DROP COLUMN on an indexed column can result in a crash or data corruption. (MDEV-20479)
Can result in crashes, hangs, stalls
Replication could hang for InnoDB transactions as InnoDB has its own concurrency control innodb_
thread_ concurrency. (MDEV-20247)
Fix potential crash in ON UPDATE CASCADE when the foreign table is system versioned. (MDEV-20311)
Can result in unexpected behavior
After setting SET foreign_
key_it is possible to drop indexes from referenced (parent) tables, which could cause InnoDB to behave as if table checks=0
doesn't exist in engine(MDEV-17187)
Fix for corner case where MariaDB Backup could fail because encrypted data files could not be copied if created shortly before the backup was started. (MDEV-18128)
MariaDB Backup could fail in the prepare face if the redo log is bigger than 512GB. (MDEV-20060)
If user enables encryption for temporary table and uses full_
crc32 format then temp table read may give error. (MDEV-20340)
Related to performance
Optimized scanning of the undo log versions while scanning the secondary index versions. (MDEV-20301)
Improved performance for mariabackup --prepare and InnoDB crash recovery, and the InnoDB write performance. (MENT-139)
predicate_system variable added conversion_ threshold
mysqld --in-predicate-conversion-threshold command-line option added
In alignment to the enterprise lifecycle, MariaDB Enterprise Server 10.4.8-3 is provided for:
Red Hat Enterprise Linux 8
Red Hat Enterprise Linux 7
Red Hat Enterprise Linux 6
Some components of MariaDB Enterprise Server might not support all platforms. For additional information, see "MariaDB Corporation Engineering Policies".
CentOS 6, Debian 8, and Red Hat Enterprise Linux 6 are no longer supported as per the MariaDB Engineering Policy. Older releases are available from the MariaDB Downloads page. Instructions for installation are included as a
README file within the download.