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MySQL Community Server 5.5.42 has been released

Dear MySQL users,

MySQL Server 5.5.42 is a new version of the 5.5 production release
of the world's most popular open source database. MySQL 5.5.42 is
recommended for use on production systems.

MySQL 5.5 includes several high-impact enhancements to improve the
performance and scalability of the MySQL Database, taking advantage of
the latest multi-CPU and multi-core hardware and operating systems. In
addition, with release 5.5, InnoDB is now the default storage engine for
the MySQL Database, delivering ACID transactions, referential integrity
and crash recovery by default.

MySQL 5.5 also provides a number of additional enhancements including:

  - Significantly improved performance on Windows, with various
    Windows specific features and improvements
  - Higher availability, with new semi-synchronous replication and
    Replication Heartbeat
  - Improved usability, with Improved index and table partitioning,
    SIGNAL/RESIGNAL support and enhanced diagnostics, including a new
    Performance Schema monitoring capability.

For a more complete look at what's new in MySQL 5.5, please see the
following resources:

MySQL 5.5 is GA, Interview with Tomas Ulin:




Whitepaper: What's New in MySQL 5.5:


If you are running a MySQL production level system, we would like to
direct your attention to MySQL Enterprise Edition, which includes the
most comprehensive set of MySQL production, backup, monitoring,
modeling, development, and administration tools so businesses can
achieve the highest levels of MySQL performance, security and uptime.


For information on installing MySQL 5.5.42 on new servers, please see
the MySQL installation documentation at


For upgrading from previous MySQL releases, please see the important
upgrade considerations at:


MySQL Database 5.5.42 is available in source and binary form for a
number of platforms from our download pages at:


The following section lists the changes in the MySQL source code since
the previous released version of MySQL 5.5. It may also be viewed
online at:



Changes in MySQL 5.5.42 (2015-02-02)

   Functionality Added or Changed

     * Support for the SSL 2.0 and SSL 3.0 protocols has been
       disabled because they provide weak encryption. (Bug

     * yaSSL was upgraded to version 2.3.7. (Bug #19695101, Bug

     * The valid date range of the SSL certificates in
       mysql-test/std_data has been extended to the year 2029.
       (Bug #18366947)

   Bugs Fixed

     * InnoDB: A multiple-table delete operation caused the
       server to halt. (Bug #19815702)

     * Replication: If a DROP DATABASE statement failed on the
       master, mismatched tables could be left on the slave,
       breaking replication. This was caused by the DROP TABLE
       statement being binary logged if at least one table was
       deleted during the DROP DATABASE operation. The fix
       ensures that in such a situation the DROP TABLE statement
       is binary logged with the IF EXISTS option. (Bug #74890,
       Bug #20041860)

     * Unlocking a temporary table after locking and truncating
       it could cause a server exit. (Bug #19786309)

     * The Enterprise Encryption plugin could mishandle string
       arguments. (Bug #19688008)

     * FLUSH TABLES on a FEDERATED table failed if the table had
       been idle longer than the wait_timeout time plus the TCP
       keepalive time. (Bug #17599258)

     * Selecting all columns from INFORMATION_SCHEMA.TABLES did
       not reopen tables if they were in the table cache, but
       selecting a subset of those columns under the same
       conditions did reopen tables. (Bug #16869534)

     * MySQL failed to compile with GCC 4.9.1 in debug mode.
       (Bug #74710, Bug #19974500)

     * A file created for an internal temporary table could
       cause problems if the file was orphaned for some reason
       and the file name was reused for later queries. (Bug
       #32917, Bug #11747548)

On behalf of Oracle/MySQL RE Team
Hery Ramilison

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