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Release Notes for MariaDB Enterprise Server 10.4.8-3

This third release of 10.4 is a maintenance release, including a variety of fixes.

MariaDB Enterprise Server 10.4.8-3 was released on 2019-09-30.

Notable Changes

  • plugin sends an error to the client when auditing cannot be started. When reloaded, wrong filter definitions will result in an error, and the old cache filters will be used. (MENT-256)

Issues Fixed

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 transaction commits. This could lead to a server crash or data loss. ()

  • INSERT...ON DUPLICATE KEY UPDATE, when there is more than one key, could result in inconsistent data between master and slave for replication mode and . This has been fixed for MIXED but cannot be controlled by the replication for based replication.

  • Inconsistent Slaves need to be set up again from the Master. ()

Can result in a hang or crash

  • Replication could hang for transactions, as has its own concurrency control, innodb_thread_concurrency. ()

  • Fix potential crash in ON UPDATE CASCADE when the foreign table is . ()

Can result in unexpected behavior

  • After setting , it is possible to drop indexes from referenced (parent) tables, which could cause to behave as if the table doesn't exist in the engine. ()

  • Fix for a corner case where could fail because encrypted data files could not be copied if created shortly before the backup was started. ()

  • could fail in the prepare phase if the redo log is bigger than 512GB. ()

Related to performance

  • Optimized scanning of the undo log versions while scanning the secondary index versions. ()

  • Improved performance for and crash recovery, and the write performance. ()

Interface Changes

  • system variable was added.

  • command-line option added.

Platforms

In alignment with the , MariaDB Enterprise Server 10.4.8-3 is provided for:

  • CentOS 8

  • CentOS 7

  • CentOS 6

  • Debian 10

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

Note

CentOS 6, Debian 8, and Red Hat Enterprise Linux 6 are no longer supported as per the "".

Installation Instructions

Upgrade Instructions

Wrong value on instantly added column can occur after and a following of the PRIMARY KEY. (MDEV-20066)
  • INSTANT DROP COLUMN on an indexed column can result in a crash or data corruption. (MDEV-20479)

  • If the user enables encryption for the temporary table and uses the full_crc32 format, then the temp table read may give an error. (MDEV-20340)

    Debian 9
  • Debian 8

  • Red Hat Enterprise Linux 8

  • Red Hat Enterprise Linux 7

  • Red Hat Enterprise Linux 6

  • Ubuntu 18.04

  • Ubuntu 16.04

  • Microsoft Windows

  • MariaDB Engineering Policy]]. Older releases are available from the MariaDB Downloads page. Instructions for installation are included as a README file within the download.

    MDEV-15326
    MDEV-17614
    MDEV-20247
    MDEV-20311
    MDEV-17187
    MDEV-18128
    MDEV-20060
    MDEV-20301
    MENT-139
    enterprise lifecycle
    MariaDB Corporation Engineering Policies
    MariaDB Corporation Engineering Policies
    MariaDB Enterprise Server
    MariaDB Enterprise Audit
    INSERT
    MIXED
    STATEMENT
    STATEMENT
    InnoDB
    InnoDB
    system versioned
    foreign_key_checks=0
    InnoDB
    MariaDB Enterprise Backup
    MariaDB Enterprise Backup
    mariadb-backup
    --prepare
    InnoDB
    InnoDB
    in_predicate_conversion_threshold
    mysqld
    --in-predicate-conversion-threshold
    MariaDB Enterprise Server 10.4
    Enterprise Cluster Topology with MariaDB Enterprise Server 10.4
    Primary/Replica Topology with MariaDB Enterprise Server 10.4
    Enterprise Spider Sharded Topology with MariaDB Enterprise Server 10.4
    Upgrade to MariaDB Enterprise Server 10.4
    Upgrade from MariaDB Community Server to MariaDB Enterprise Server 10.4
    DELETE
    UPDATE
    Enterprise Spider Federated Topology with MariaDB Enterprise Server 10.4

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