Release Notes for MariaDB Enterprise Server 10.2.27-3
This page is part of MariaDB's MariaDB Documentation.
The parent of this page is: Release Notes for MariaDB Enterprise Server 10.2
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This third release of MariaDB Enterprise Server 10.2 is a maintenance release, including a variety of fixes.
MariaDB Enterprise Server 10.2.27-3 was released on 2019-09-30.
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 Primary and replica for replication mode MIXED and STATEMENT. This has been fixed for MIXED, but cannot be controlled by the replication for STATEMENT based replication.
Inconsistent replicas need to be set up again from the Primary. (MDEV-17614)
Can result in crashes, hangs, stalls
Replication could hang for InnoDB transactions as InnoDB has its own concurrency control innodb_
thread_. (MDEV-20247) concurrency
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)
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)
Basic 3-way join queries are not parsed. (MDEV-19421)
Related to performance
Optimized scanning of the undo log versions while scanning the secondary index versions. (MDEV-20301)
In alignment to the enterprise lifecycle, MariaDB Enterprise Server 10.2.27-3 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.