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MySQL Connector/J 5.1.30 has been released
Posted by: Karen Langford
Date: March 31, 2014 06:52AM

Hello all,

MySQL Connector/J 5.1.30, a maintenance release of the production 5.1
branch has been released. Connector/J is the Type-IV pure-Java JDBC
driver for MySQL.

Version 5.1.30 is suitable for use with many MySQL server versions,
including 4.1, 5.0, 5.1, 5.4, 5.5 and 5.6.

MySQL Connector Java (Commercial) is already available for download on the
My Oracle Support (MOS) website. This release will be available on eDelivery
(OSDC) in next month's upload cycle.

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.

MySQL Connector/J 5.1.30 includes the following general bug fixes and
improvements, also available in more detail on :

Changes in MySQL Connector/J 5.1.30 (2014-03-31)

   Functionality Added or Changed

     * Connector/J now supports MySQL Fabric. See Using Connector/J
       with MySQL Fabric
for details.

   Bugs Fixed

     * Replaced a for loop with the System.arraycopy() method for
       copying array values in the
       MysqlIO.unpackNativeEncodedColumn() and
       LoadBalancingConnectionProxy.addHost() methods, in order to
       improve the two methods' performance. (Bug #18327245, Bug

     * Avoided the use of an iterator over the list of statement
       interceptors in the methods
       MysqlIO.invokeStatementInterceptorsPost() and
       MysqlIO.invokeStatementInterceptorsPre(), so that Connector/J
       does not increase the stack size unnecessarily. (Bug
       #18236388, Bug #71679)

     * Improved on the code for integer-to-hex conversion when
       building XA commands by avoiding the creation of temporary
       character arrays, thus enhancing performance. (Bug #18228302,
       Bug #71621)

     * The Field.getStringFromBytes() method created a useless byte
       array when using JVM's converter and the encoding defined by
       the connection. This fix makes the method call
       StringUtils.toString() using the original buffer instead of
       creating a temporary byte array for the call. (Bug #18228668,
       Bug #71623)

     * There were sporadic cases of the key store file being open
       hundreds of times and causing some "Too many files open"
       errors. This fix makes sure that in
       com.mysql.jdbc.ExportControlled and in
       MysqlIO.sendFileToServer(), the input stream for the key store
       file is explicitly closed after use. (Bug #18107621, Bug

     * It was intended that if a previous query on a connection had
       used the setMaxRows() method, in the next query, Connector/J
       would not cancel that by setting SQL_SELECT_LIMIT=DEFAULT if
       the query contained a LIMIT clause. However, in the actual
       implementation, the maximum row setting was reused in the
       subsequent query in various situations beyond expectation (for
       example, when a table name contains the string "limit" in it).
       This fix removes the LIMIT-clause parsing and replaces it by a
       better way of controlling the maximum rows per session. (Bug
       #18110320, Bug #71396)

     * When working with MySQL 5.6, calling
       PreparedStatement.setTimestamp() resulted in a
       java.lang.StringIndexOutOfBoundsException being thrown if the
       Timestamp contained a fractional second. This fix corrects the
       digit truncation performed in the formatNanos() method, which
       was the cause of the problem. (Bug #18091639)

     * Calling ResultSet.close() on an already closed ResultSet
       caused an SQLException. While the exception was silently
       discarded, it did result in performance issues. This fix makes
       Connector/J comply with the Java specification that when a
       ResultSet object is already closed, application of the close
       method on it should be a no-op. (Bug #16722637, Bug #67318)

     * Fixed the problem of the wrong source being provided when the
       build property com.mysql.jdbc.noCryptoBuild was set.


On behalf of Oracle/MySQL Build Team,
Murthy Narkedimilli 

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MySQL Connector/J 5.1.30 has been released
March 31, 2014 06:52AM

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