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MySQL Router 8.0.3-dmr has been released
Posted by: Balasubramanian Kandasamy
Date: September 29, 2017 06:54AM

Dear MySQL users,

MySQL Router 8.0.3 dmr is the first development release for
MySQL Router 8.0 series.

The MySQL Router is a new building block for high availability
solutions based on MySQL InnoDB clusters.

By taking advantage of the new Group Replication technology,
and combined with the MySQL Shell, InnoDB clusters provide an
integrated solution for high availability and scalability for
InnoDB based MySQL databases, that does not require advanced MySQL

The deployment of applications with high availability requirements
is greatly simplified by MySQL Router. MySQL client connections are
transparently routed to online members of a InnoDB cluster, with
MySQL server outages and cluster reconfigurations being automatically
handled by the Router.

To download MySQL Router 8.0.3 dmr, see the "Development Releases"
tab at Package binaries are
available for several platforms and also as a source code download.

Documentation for MySQL Router can be found at


Changes in MySQL Router 8.0.3 (2017-09-29, Development Milestone)

   MySQL Connectors and other MySQL client tools and
   applications now synchronize the first digit of their version
   number with the (highest) MySQL server version they support.
   This change makes it easy and intuitive to decide which
   client version to use for which server version. MySQL Router
   now uses the same version number as MySQL Server.

   MySQL Router 8.0.3 is the first release to use the new
   numbering. It is the successor to MySQL Router 2.1.4.

   Functionality Added or Changed

     * The quorum calculation was adjusted to take into account
       the RECOVERING node status. In other words, the
       calculation was changed from have_quorum = (online_nodes
       > all_nodes/2) to have_quorum = (online_nodes +
       recovering_nodes > all_nodes/2). For routing purposes,
       RECOVERING is still seen as UNREACHABLE.

     * TERM and INT signal handlers were added.

     * Graceful shutdown and restart support was improved. For
       example, if Router is being run from the console then
       Control + C will cleanly stop Router and its loaded
       plugins. Likewise, killing the process (Linux) or service
       (Windows) will also gracefully shut down Router.

     * Some errors were not logged if MySQL Router exited
       unexpectedly, and these errors were sent to stderr
       instead of the logging mechanism defined by Router's
       configuration file. These errors included failure to
       write or find PID files, if no Router plugins were
       configured, if metadata_cache was defined twice, and if a
       configured user did not exist.

     * A new mysqlrouter_plugin_info utility was added to help
       debug MySQL Router plugins. It provides information such
       as the plugin version, description, ABI version,
       requirements, and function pointers.

   Bugs Fixed

     * On some Linux variants (such as Ubuntu), the Router
       installation would set the owner as mysqlrouter:adm
       instead of mysqlrouter:mysqlrouter for generated
       directories. (Bug #26530142)

     * On Windows, if a plugin failed to load, Router would exit
       without unloading the plugin. (Bug #26434831)

     * Removed the MySQL Connector specific "MySQL FOSS License
       Exception" from the README file. (Bug #26361093)

     * The generated file contained a bogus sudo
       reference that made usage require sudo
       privileges. (Bug #25853768)

     * To fall in line with other MySQL binaries, -? is now used
       instead of -h as a short form for the --help option.
       (Bug #25813290)

     * To fall in line with other MySQL binaries, -V is now used
       instead of -v as a short form for the --version option.
       (Bug #25813190)

     * Router would not exit after failing to bind to a port
       despite posting "Bind Address can not be part of
       destinations" to the error log. (Bug #23501906, Bug #81643)

On behalf of Oracle MySQL Release Team
Balasubramanian Kandasamy

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MySQL Router 8.0.3-dmr has been released
September 29, 2017 06:54AM

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