> For the complete documentation index, see [llms.txt](https://mariadb.com/docs/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://mariadb.com/docs/release-notes/enterprise-server/old-releases/10.4/10.4.8-3.md). # Release Notes for MariaDB Enterprise Server 10.4.8-3 This third release of [MariaDB Enterprise Server](/docs/server/architecture/topologies/single-node-topologies/enterprise-server.md) 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 * [MariaDB Enterprise Audit](/docs/server/reference/plugins/mariadb-audit-plugin.md) 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](https://jira.mariadb.org/browse/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 [INSERT](/docs/server/reference/sql-statements/data-manipulation/inserting-loading-data/insert.md) transaction commits. This could lead to a server crash or data loss. ([MDEV-15326](https://jira.mariadb.org/browse/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](/docs/server/ha-and-performance/standard-replication/replication-and-binary-log-system-variables.md) and [STATEMENT](/docs/server/ha-and-performance/standard-replication/replication-and-binary-log-system-variables.md). This has been fixed for MIXED but cannot be controlled by the replication for [STATEMENT](/docs/server/ha-and-performance/standard-replication/replication-and-binary-log-system-variables.md) based replication. * Inconsistent Slaves need to be set up again from the Master. ([MDEV-17614](https://jira.mariadb.org/browse/MDEV-17614)) * Wrong value on instantly added column can occur after [DELETE](/docs/server/reference/sql-statements/data-manipulation/changing-deleting-data/delete.md) and a following [UPDATE](/docs/server/reference/sql-statements/data-manipulation/changing-deleting-data/update.md) of the PRIMARY KEY. ([MDEV-20066](https://jira.mariadb.org/browse/MDEV-20066)) * INSTANT DROP COLUMN on an indexed column can result in a crash or data corruption. ([MDEV-20479](https://jira.mariadb.org/browse/MDEV-20479)) ### Can result in a hang or crash * Replication could hang for [InnoDB](/docs/server/server-usage/storage-engines/innodb.md) transactions, as [InnoDB](/docs/server/server-usage/storage-engines/innodb.md) has its own concurrency control, innodb\_thread\_concurrency. ([MDEV-20247](https://jira.mariadb.org/browse/MDEV-20247)) * Fix potential crash in ON UPDATE CASCADE when the foreign table is [system versioned](/docs/server/reference/sql-structure/temporal-tables/system-versioned-tables.md). ([MDEV-20311](https://jira.mariadb.org/browse/MDEV-20311)) ### Can result in unexpected behavior * After setting [foreign\_key\_checks=0](/docs/server/server-management/variables-and-modes/server-system-variables.md#foreign_key_checks), it is possible to drop indexes from referenced (parent) tables, which could cause [InnoDB](/docs/server/server-usage/storage-engines/innodb.md) to behave as if the table `doesn't exist in the engine`. ([MDEV-17187](https://jira.mariadb.org/browse/MDEV-17187)) * Fix for a corner case where [MariaDB Enterprise Backup](/docs/server/server-usage/backup-and-restore/mariadb-enterprise-backup.md) could fail because encrypted data files could not be copied if created shortly before the backup was started. ([MDEV-18128](https://jira.mariadb.org/browse/MDEV-18128)) * [MariaDB Enterprise Backup](/docs/server/server-usage/backup-and-restore/mariadb-enterprise-backup.md) could fail in the prepare phase if the redo log is bigger than 512GB. ([MDEV-20060](https://jira.mariadb.org/browse/MDEV-20060)) * 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](https://jira.mariadb.org/browse/MDEV-20340)) ### Related to performance * Optimized scanning of the undo log versions while scanning the secondary index versions. ([MDEV-20301](https://jira.mariadb.org/browse/MDEV-20301)) * Improved performance for [mariadb-backup](/docs/server/server-usage/backup-and-restore/mariadb-backup.md) [--prepare](/docs/server/server-usage/backup-and-restore/mariadb-backup/mariadb-backup-options.md#prepare) and [InnoDB](/docs/server/server-usage/storage-engines/innodb.md) crash recovery, and the [InnoDB](/docs/server/server-usage/storage-engines/innodb.md) write performance. ([MENT-139](https://jira.mariadb.org/browse/MENT-139)) ## Interface Changes * [in\_predicate\_conversion\_threshold](/docs/server/server-management/variables-and-modes/server-system-variables.md#in_predicate_conversion_threshold) system variable was added. * [mysqld](/docs/server/server-management/starting-and-stopping-mariadb/mariadbd.md) [--in-predicate-conversion-threshold](/docs/server/server-management/variables-and-modes/server-system-variables.md#in_predicate_conversion_threshold) command-line option added. ## Platforms In alignment with the [enterprise lifecycle](/docs/release-notes/enterprise-server/about/enterprise-server-lifecycle.md), MariaDB Enterprise Server 10.4.8-3 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 * 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](https://mariadb.com/engineering-policies). #### Note CentOS 6, Debian 8, and Red Hat Enterprise Linux 6 are no longer supported as per the "[MariaDB Corporation Engineering Policies](https://mariadb.com/engineering-policies)". | | | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- | | MariaDB Engineering Policy]]. Older releases are available from the [MariaDB Downloads page](https://mariadb.com/downloads). Instructions for installation are included as a README file within the download. | ## Installation Instructions * [MariaDB Enterprise Server 10.4](/docs/server/architecture/topologies/single-node-topologies/enterprise-server.md) * [Enterprise Cluster Topology with MariaDB Enterprise Server 10.4](/docs/server/architecture/topologies/galera-cluster.md) * [Primary/Replica Topology with MariaDB Enterprise Server 10.4](/docs/server/architecture/topologies/primary-replica.md) * [Enterprise Spider Sharded Topology with MariaDB Enterprise Server 10.4](/docs/server/architecture/topologies/mariadb-enterprise-spider-topologies/sharded-mariadb-enterprise-spider-topology.md) * [Enterprise Spider Federated Topology with MariaDB Enterprise Server 10.4](/docs/server/architecture/topologies/mariadb-enterprise-spider-topologies/federated-mariadb-enterprise-spider-topology.md) ## Upgrade Instructions * Upgrade to MariaDB Enterprise Server 10.4 * [Upgrade from MariaDB Community Server to MariaDB Enterprise Server 10.4](/docs/server/server-management/install-and-upgrade-mariadb/upgrading/platform-specific-upgrade-guides/upgrading-on-linux/upgrading-between-major-mariadb-versions.md) *This page is: Copyright © 2026 MariaDB. 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