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From:Surabhi Bhat Date:December 14 2018 5:10pm
Subject:MySQL Cluster Manager 1.4.7 has been released
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Dear MySQL Users,

MySQL Cluster Manager 1.4.7 can be downloaded from
the My Oracle Support (MOS) website. It will also be available
on Oracle Software Delivery Cloud at 
the next monthly update

MySQL Cluster Manager is an optional component of the MySQL Cluster Carrier
Grade Edition, providing a command-line interface that automates common
management tasks, including the following online operations:
  - Configuring and starting MySQL Cluster
  - Upgrades
  - Adding and removing cluster nodes
  - Adding and removing site hosts
  - Configuration changes
  - Backup and restore

MySQL Cluster Manager is a commercial extension to the MySQL family of 
More details can be found at

A brief summary of changes in MySQL Cluster Manager version 1.4.7 is 
listed below:

Changes in MySQL Cluster Manager 1.4.7  (2018-12-14)

  * Functionality Added or Changed

  * Bugs Fixed

*Functionality Added or Changed*

      * Agent: Performance has been improved for the add package
        command by removing unnecessary queries from its
        execution process. (Bug #28950231)

      * Agent: The initialization script for mcmd now cleans up
        the temporary files it creates under the tmp directory while
        starting new mcmd processes. (Bug #28924059)

      * Agent: The list hosts command now returns, in addition to
        Available and Unavailable, two more possible statuses for
        the agent of a host:

           + Recovery: The agent is in the process of recovering

           + Unresponsive: The agent rejected an attempt to
        (Bug #28438155)

      * Agent: The option --core-file
        when used at the command line to start a node in a wild
        cluster, now causes the import cluster and update process
        commands to give a warning (that the option "may be
        removed on next restart of the process"), instead of
        causing the commands to fail. See Creating and
        Configuring the Target Cluster
        for details. (Bug #28177366)

      * Agent: The import cluster and update process commands now
        support a new --remove-angel option, which kills any
        angel processes for the data nodes to be imported or
        updated and also updates the data nodes' PID files. See
        descriptions for the two commands for details. (Bug

      * Agent: The backup cluster command finishes faster now, as
        some unnecessary wait time has been eliminated from the
        backup process. (Bug #27986443)

      * Agent: A new option for mcmd, --initial, allows an agent
        that has fallen into an inconsistent state to recover its
        configuration from other agents. See the description for
        --initial for details. (Bug #20892397)

      * Agent: The set, get, and reset commands now support the
        following command-line-only attributes, which can only be
        configured at the command line when outside MySQL Cluster

           + For ndb_mgmd: --core-file, --log-name, --verbose

           + For ndbd and ndbmtd: --core-file, -- --verbose

      * Agent: The internal mechanism for agent recovery
        has been improved, making it more robust and less error-prone.

      * Client: To reduce the size of the mcmd log, node events
        are no longer dumped into the log during a cluster
        restart. (Bug #28843656)

      * Client: The message for ERROR 5200 ("Restore cannot be
        performed ...") has been expanded to include the reason
        for the restore's failure. (Bug #25075284)

      * Client: The message for ERROR 5017 has been expanded to
        include the reason for an action being invalid for a
        process or cluster. (Bug #22777846)

*Bugs Fixed*

      * Agent: During a rolling restart for a cluster (which
        takes place, for example, after a cluster
        reconfiguration), the node group IDs for some data nodes
        might become some invalid numbers transiently, and that
        might cause mcmd to throw an internal error (Error 1003).
        With this fix, such transient changes of node group IDs
        are ignored by mcmd, and no error is thrown. (Bug

      * Agent: An update process command on a mysqld node failed
        with a timeout if the node was in the status of stopping.
        It was because mcmd did not retry stopping the node, and
        this fix makes it do so in the situation. (Bug #28913525)

      * Agent: After a cluster reconfiguration failed, the
        restart of an mcmd agent that had lost contact with other
        agents might fail with a checksum error. That was because
        in the process, the original configuration for the
        cluster was removed from the agent's repository by
        mistake. With this fix, the original cluster
        configuration was preserved and the agent restarts as
        expected. (Bug #28904775)

      * Agent: When trying to shutdown a mysqld node, if mcmd
        failed to get the MySQL Server's version number through a
        query, the shutdown failed because mcmd could not decide
        on the proper shutdown method. With this fix, mcmd falls
        back on the shutdown method for the MySQL Server version
        bundled with the mcmd version in the MySQL Cluster CGE
        distribution. (Bug #28830884)

      * Agent: Commands to reconfigure or stop a cluster hung
        when a mysqld node did not respond to queries. With this
        fix, under the situation, a query to a mysqld node times
        out after a certain period of time, after which the
        command for reconfiguring or stopping the cluster is
        aborted and an error is returned. (Bug #28813012)

      * Agent: mcmd hung when it failed to stop a data node that
        was in an unknown status. With this fix, the stop process
        command fails with an error in the situation. (Bug

      * Agent: Attempts to restore an mcmd agent with data from
        other agents
        failed with the agent remaining in the state of recovering indefinitely,
        when any of the cluster log files was very long. With this
        fix, the agent only scans the most recent segments of the
        logs instead of the full logs for error information,
        which speeds up the restore process and allows it to be
        completed. (Bug #28671584)

      * Agent: In an environment that used only IP addresses, if
        a site was defined using host names, an mcmd agent hung
        at startup or restart when it attempted reverse DNS
        lookups. (Bug #28437469)

      * Agent: The collect logs command sometimes reported
        success before the operation was actually finished if the
        cluster had many hosts and a lot of log data to be
        collected. (Bug #28282932)

      * Agent: mcmd failed to start when its init.d script found
        the previous PID for mcmd was in use by another process,
        which was taken to mean mcmd was already running. With
        this fix, the process name for the PID is also checked,
        so that mcmd is started again if the PID is no longer
        used by mcmd. (Bug #28278727)

      * Agent: The collect log command failed with an ERROR 1003
        Internal error when no data was received on the TCP
        connection established for collecting data from another
        host. With this fix, the connection is closed gracefully
        if no data is received, allowing other hosts to connect
        to the TCP port and send data. (Bug #28278410)

      * Agent: The restore cluster command failed when the
        cluster to be restored contained databases with special
        characters in their names. (Bug #28220549)

      * Agent: Memory leaks occurred when an mcmd process on a
        management node read large cluster logs during its
        operations. This fix makes sure mcmd regularly truncates
        the buffer for log reading, so the buffer size does not
        keep growing in an uncontrolled manner. (Bug #28076545)

      * Agent: On Windows platforms, the collect logs command
        failed with an ERROR 1003 Internal error when the path
        name of a log file to be transferred was exactly 260
        characters. It was because, while 260 is the maximum
        number of characters allowed, the internal test forgot to
        count the trailing zero for the path name in the internal
        buffer, so it failed to catch the error. With this fix,
        mcmd throws an ERROR 106 Path max length exceeded for
        file instead in the situation. (Bug #28062069)

      * Agent: If mcmd was started on Windows platforms with the
        option --log-syslog being true but without specifying the
        --log-file option, running the show settings command
        would cause mcmd to quit with an Error 2013 (Lost
        connection to MySQL server during query). (Bug #27981362)

      * Agent: When, due to some reasons (for example, time jumps
        on virtual machines), an mcmd agent ended up receiving
        incomplete event records from an ndb_mgmd node, the agent
        quit unexpectedly. With this fix, mcmd can now parse and
        handle incomplete records properly. (Bug #25746295)

      * Agent: Agent recovery (for example, after upgrading the
        agents) sometimes failed when the agent received recovery
        configurations both locally and from a remote host, and
        the recovering process was then frustrated, With the new
        recovery mechanism now in place, the recovery
        configuration is only received once. (Bug #25517245)

      * Agent: The create site command failed with a timeout when
        the site to be created had a large number of hosts (more
        than 45), and the hosts were not uniform in their machine
        configurations. (Bug #25075284)

      * Client: In a number of instances where an ndb_mgmd
        command or a mysqld query failed, the wrong error (Error
        1006 or Error 7006) was thrown. With this fix, the
        appropriate Error 7030 is thrown instead. (Bug #28829732)

On Behalf of MySQL Release Engineering team,
Surabhi Bhat

MySQL Cluster Manager 1.4.7 has been releasedSurabhi Bhat14 Dec