Release Notes for MariaDB Enterprise Server 10.3.20-4

Release Notes for MariaDB Enterprise Server 10.3.20-4

This fourth release of MariaDB Enterprise Server 10.3 is a maintenance release, including a variety of fixes.

MariaDB Enterprise Server 10.3.20-4 was released on 2019-11-18.

Fixed Security Vulnerabilities

CVE (with cve.org link)	CVSS base score
CVE-2020-2780	6.5
CVE-2019-2974	6.5
CVE-2019-2938	4.4

Notable Changes

• New option innodb_change_buffer_dump added to Debug builds. This option dumps the contents of the InnoDB change buffer to the server error log at startup. This is useful when a slow shutdown cannot be performed successfully. (MDEV-20864)

• Eliminated unnecessary logging of warnings to the error log regarding InnoDB maximum row size for DML statements, which should be present only for DDL operations. (MENT-454)

Issues Fixed

Can result in data loss

• mariadb-backup --prepare --export ... could overwrite binary logs if certain conditions were present. (MDEV-20703) Conditions that must be present to trigger this bug:

  • mariadb-backup is executed on the MariaDB Server host, and

  • Configuration files from the master are used, and

  • Configuration files enable binary logging

• If unable to upgrade to MariaDB Enterprise Server 10.3.20-4, where this bug is fixed, a workaround is available: use the --defaults option to mariadb-backup to avoid the bug-triggering conditions by specifying a different configuration file.

Can result in a hang or crash

• Prior removal of a `#FULLTEXT

index from an InnoDB table can cause a hang on startup. (MDEV-19647)`

• Removal of a `#FULLTEXT

index from an InnoDB table can cause a hang. (MDEV-19529)`

• Change to an InnoDB table containing a `#FULLTEXT

index can cause the Server to become unresponsive. (MDEV-20987)`

• Removal of a virtual column used by an index can result in a crash. (MENT-434)

• CREATE INDEX, ALTER TABLE, or OPTIMIZE TABLE on an InnoDB table can cause the Server to become unresponsive. (MDEV-20852)

• INSTANT ADD COLUMN on an InnoDB table, which includes a FOREIGN KEY definition can result in a crash. (MENT-435)

Can result in unexpected behavior

• Unnecessary logging of warnings to the error log regarding InnoDB maximum row size for DML statements, which should be present only for DDL operations. (MENT-454)

• After server restart, a SELECT using a #FULLTEXT

index on InnoDB tables can fail to return some data. (MDEV-19073)`

• MariaDB Enterprise Backup and MariaDB Backup, when using mbstream, recreated xtrabackup_info in the same directory as the backup file. Repeated extraction of the backup could fail. (MDEV-18438)

• mysqld_multi.sh script could not be launched and returned a syntax error. (MENT-433)

• Though not supported on Microsoft Windows, the server_audit_output_type system variable for the Audit plugin accepted a SYSLOG value. (MDEV-19851)

• FOREIGN KEY constraints have been ignored during DELETE when the parent table is System-Versioned. (MDEV-16210)

• DELETE from the child table with a FOREIGN KEY was not possible when the table is System-Versioned. (MDEV-20812)

Related to install and upgrade

• Installing MariaDB Enterprise Server from the repository failed on CentOS 7 due to package dependencies. (MENT-420)

Interface Changes

• WARN_INNODB_PARTITION_OPTION_IGNORED error code added

Platforms

In alignment with the enterprise lifecycle, MariaDB Enterprise Server 10.3.20-4 is provided for:

• CentOS 8

• CentOS 7

• CentOS 6

• Debian 10

• Debian 9

• Debian 8

• Red Hat Enterprise Linux 8

• Red Hat Enterprise Linux 7

• Red Hat Enterprise Linux 6

• SUSE Linux Enterprise Server 15

• SUSE Linux Enterprise Server 12

• Ubuntu 18.04

• Ubuntu 16.04

• Microsoft Windows

Some components of MariaDB Enterprise Server might not support all platforms. For additional information, see "MariaDB Corporation Engineering Policies".

Note

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.

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