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MySQL Connector/J 5.1 Release Notes  /  Changes in MySQL Connector/J 5.1  /  Changes in MySQL Connector/J 5.1.44 (2017-08-30)

Changes in MySQL Connector/J 5.1.44 (2017-08-30)

Version 5.1.44 is a maintenance release of the production 5.1 branch. It is suitable for use with MySQL Server versions 5.5, 5.6, and 5.7. It supports the Java Database Connectivity (JDBC) 4.2 API.

Functionality Added or Changed

  • A new connection property, enabledTLSProtocols, can now be used to override the default restrictions on the TLS versions to be used for connections, which are determined by the version of the MySQL Server that is being connected to. By providing a comma-separated list of values to this option (for example, TLSv1,TLSv1.1,TLSv1.2) users can, for example, prevent connections from using older TLS version, or allow connections to use TLS versions only supported by a user-compiled MySQL Server. See the entry for the new property in Configuration Properties for Connector/J for details. Thanks to Todd Farmer for contributing the code. (Bug #26646676)

Bugs Fixed

  • Important Change: Following the changes in MySQL Server 8.0.3, the system variables tx_isolation and tx_read_only have been replaced with transaction_isolation and transaction_read_only in the code of Connector/J. Users should update Connector/J to this latest release in order to connect to MySQL 8.0.3. They should also make the same adjustments to their own applications if they use the old variables in their codes. (Bug #26440544)

  • When using cached server-side prepared statements, a memory leak occurred as references to opened statements were being kept while the statements were being decached; it happened when either the close() method has been called twice on a statement, or when there were conflicting cache entries for a statement and the older entry had not been closed and removed from the opened statement list. This fix makes sure the statements are properly closed in both cases. Thanks to Eduard Gurskiy for contributing to the fix. (Bug #26633984, Bug #87429)

  • The regression test for Bug#63800 failed because the default value of the system variable explicit_defaults_for_timestamp of MySQL Server has been changed since release 8.0.2. The test has been adjusted to take the change into consideration. (Bug #26501245)