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MySQL Connector/J 8.0.14 has been released

Dear MySQL users,

MySQL Connector/J Version 8.0.14 is the GA release of the 8.0
branch of MySQL Connector/J. It is suitable for use with MySQL Server
versions 8.0, 5.7, 5.6, and 5.5. It supports the Java Database
Connectivity (JDBC) 4.2 API, and implements the X DevAPI.

This release includes the following new features and changes, also
described in more detail on

As always, we recommend that you check the “CHANGES” file in the
download archive to be aware of changes in behavior that might affect
your application.

To download MySQL Connector/J 8.0.14 GA, see the “Generally Available
(GA) Releases” tab at

Changes in MySQL Connector/J 8.0.14 (2019-01-21, General

Functionality Added or Changed

  • Important Change: For MySQL Server 8.0.14 and later,
    5.7.25 and later, 5.6.43 and later, and 5.5.63 and later,
    minimal permissions on named pipes are granted to clients
    that use them to connect to the server. Connector/J,
    however, can only use named pipes when granted full
    access on them. As a workaround, the MySQL Server that
    Connector/J wants to connect to must be started with the
    system variable named_pipe_full_access_group; see the
    description for the system variable for more details.
    (Bug #28971500)
  • X DevAPI: getDefaultSchema() now returns null when no
    default schema has been set for the Session.
  • Connector/J now has a new property for building from
    source,, which controls the
    verbosity of the build process’ output. Its default value
    is false, which makes the output considerably shorter
    comparing with earlier versions of Connector/J.
    (Bug #28970166)
  • The method ResultSet.getBoolean() now returns FALSE when
    the designated column is of data type CHAR or VARCHAR and
    contains an “N” or “n”. This makes Connector/J 8.0
    behaves like Connector/J 5.1 when it comes to converting
    strings to booleans. (Bug #28706219, Bug #92574)
  • Connector/J is now capable of reading and, if needed,
    ignoring any initial notice packets sent by X Plugin
    before an X Protocol connection is established.

Bugs Fixed

  • X DevAPI: Connector/J returned a NullPointerException
    when an application tried to establish an XProtocol
    connection using a Windows named pipe, which is not
    supported. With this fix, an XProtoclException is
    returned instead.
    This fix also makes sure that instead of a
    NullPointerException, a proper exception is thrown when
    an application tries to establish a Classic MySQL
    Protocol connection with a named pipe, but the named pipe
    is not specified at connection or it cannot be found on
    the specified path. (Bug #28606708)
  • X DevAPI: Adding an empty document with executeAsync()
    resulted in an ERROR 5013 (Missing row data for Insert).
    With this fix, no error or warning is returned in the
    case. (Bug #23045642)
  • Collection.count() returned a wrong error message when
    the collection did not exist. (Bug #28924137)
  • The source code of Connector/J contains non-ASCII
    characters, which might cause encoding issues during
    compilation if the system did not also use a UTF-8
    locale. With this fix, the build script now handles
    non-ASCII characters well regardless of the system
    locale. (Bug #28894344)
  • A memory leak occurred if Connector/J was loaded via the
    bootstrap class path instead of the main application
    classpath. It was because
    AbandonedConnectionCleanupThread failed to initialize its
    internal thread in that case, so that references for
    closed connections were not cleaned up, and their number
    kept growing. This fix repairs the clean up process for
    closed connections and also makes the process thread
    safe. (Bug #28747636, Bug #92508)
  • * clearInputStream() returned a NullPointerException when
    the mysqlSocket, mysqlInput, or mysqlOutput object it
    tried to retrieve was null. With this fix, an IOExcpetion
    is thrown instead in the situation. Thanks to Henning
    Schmiedehausen for contributing to the fix.
    (Bug #28731795, Bug #92625)
  • Updating a result set returned by a server-side prepared
    statement with SELECT … FOR UPDATE
    resulted in an SQLException. (Bug #28692243, Bug #92536)
  • When the connection property zeroDateTimeBehavior was set
    to CONVERT_TO_NULL, Connector/J converted a TIME
    ( type
    value of 00:00:00 to null. With this fix, it returns a
    java.sql.Time instance of zero hours, minutes, and
    seconds, as expected. (Bug #28101003, Bug #91065)
  • When using server-side prepared statements and working
    with a table with multicolumn primary key, an updateRow()
    call failed with a NullPointerException or a
    SQLException. (Bug #25650514)
  • When using server-side prepared statements, a
    refreshRow() call after an updateRow() call failed with a
    SQLException. (Bug #25650482)
  • changeUser() failed to change or reauthenticate a user
    when all of the following were true: (a) connection to
    the server was by SSL; (b) the caching_sha2 or
    sha256_password authentication plugin was used for the
    user; and (c) the user password contained Unicode
    characters. (Bug #25642226)

On Behalf of Oracle/MySQL Release Engineering Team,
Daniel Horecki