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From:daniel.horecki Date:October 18 2017 5:00pm
Subject:MySQL Cluster 7.4.17 has been released
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Dear MySQL Users,

MySQL Cluster is the distributed, shared-nothing variant of MySQL.
This storage engine provides:

   - In-Memory storage - Real-time performance
   - Transparent Auto-Sharding - Read & write scalability
   - Active-Active/Multi-Master geographic replication
   - 99.999% High Availability with no single point of failure
     and on-line maintenance
   - NoSQL and SQL APIs (including C++, Java, http, Memcached
     and JavaScript/Node.js)

MySQL Cluster 7.4 makes significant advances in performance;
operational efficiency (such as enhanced reporting and faster restarts
and upgrades) and conflict detection and resolution for active-active
replication between MySQL Clusters.

MySQL Cluster 7.4.17, has been released and can be downloaded from

where you will also find Quick Start guides to help you get your
first MySQL Cluster database up and running.

The release notes are available from

MySQL Cluster enables users to meet the database challenges of next
generation web, cloud, and communications services with uncompromising
scalability, uptime and agility.

More details can be found at

Enjoy !

Changes in MySQL NDB Cluster 7.4.17 (5.6.38-ndb-7.4.17) (2017-10-18,
General Availability)

    MySQL NDB Cluster 7.4.17 is a new release of MySQL NDB
    Cluster 7.4, based on MySQL Server 5.6 and including features
    in version 7.4 of the NDB storage engine, as well as fixing
    recently discovered bugs in previous NDB Cluster releases.

    Obtaining MySQL NDB Cluster 7.4.  MySQL NDB Cluster 7.4
    source code and binaries can be obtained from

    For an overview of changes made in MySQL NDB Cluster 7.4, see
    What is New in NDB Cluster 7.4


    This release also incorporates all bugfixes and changes made
    in previous NDB Cluster releases, as well as all bugfixes and
    feature changes which were added in mainline MySQL 5.6
    through MySQL 5.6.38 (see Changes in MySQL 5.6.38 (2017-10-16, 
General Availability)

    Bugs Fixed

      * Added DUMP code 7027 to facilitate testing of issues
        relating to local checkpoints. For more information,
        DUMP 7027


        (Bug #26661468)

      * A previous fix intended to improve logging of node
        failure handling in the transaction coordinator
        logging of transactions that could occur in normal
        operation, which made the resulting logs needlessly
        verbose. Such normal transactions are no longer
        to the log in such cases. (Bug #26568782)
        References: This issue is a regression of: Bug

      * Some DUMP codes used for the LGMAN kernel block were
        incorrectly assigned numbers in the range used for
        belonging to DBTUX. These have now been assigned
        constants and numbers in the proper range (10001,
        and 10003). (Bug #26365433)

      * Node failure handling in the DBTC kernel block consists
        of a number of tasks which execute concurrently, and
        of which must complete before TC node failure
handling is
        complete. This fix extends logging coverage to
        when each task completes, and which tasks remain,
        includes the following improvements:

           + Handling interactions between
GCP and node failure
             handling interactions,
in which TC takeover causes
             GCP participant stall
at the master TC to allow it
             to extend the current
GCI with any transactions that
             were taken over; the
stall can begin and end in
             different GCP protocol
states. Logging coverage is
             extended to cover all
scenarios. Debug logging is
             now more consistent
and understandable to users.

           + Logging done by the QMGR block
as it monitors
             duration of node
failure handling duration is done
             more frequently. A
warning log is now generated
             every 30 seconds
(instead of 1 minute), and this now
             includes DBDIH block
debug information (formerly
             this was written
separately, and less often).

           + To reduce space used, DBTC
instance number: is
             shortened to DBTC

           + A new error code is added to
assist testing.
        (Bug #26364729)

      * A potential hundredfold signal fan-out when sending a
        START_FRAG_REQ signal could lead to a node failure
due to
        a job buffer full error in start phase 5 while
trying to
        perform a local checkpoint during a restart. (Bug
        Bug #26263397)
        References: See also: Bug #26288247, Bug #26279522.

On Behalf of Oracle/MySQL Release Engineering
-Sreedhar S & Daniel Horecki

MySQL Cluster 7.4.17 has been releaseddaniel.horecki18 Oct