The --no-daemon has been renamed to The --daemon. By default, MySQL Proxy now starts in foreground mode. Use the --daemon option to override this and start in daemon mode.

MySQL Proxy would load a configuration file with unsafe permissions, which could permit password information to be exposed through the file. MySQL Proxy now refuses to load a configuration file with unsafe permissions. (Bug #47589)

A memory leak occurred in MySQL Proxy if clients older than MySQL 4.1 connected to it. (Bug #50993)

Logging to syslog with the --log-use-syslog option did not work. (Bug #36431)

A segmentation fault occurred in MySQL Proxy if clients older than MySQL 4.1 connected to it. (Bug #48641)

Several supplied scripts were updated to account for flag and structure changes:

(Bug #47349, Bug #45408, Bug #47345, Bug #43424, Bug #42841, Bug #46141)

MySQL Proxy accepted more than one address in the value of the --proxy-backend-addresses option. You should specify one --proxy-backend-addresses option for each backend address. (Bug #47273)

MySQL Proxy raised an error when processing query packets larger than 16MB. (Bug #35202)

MySQL Proxy returned the wrong version string internally from the proxy.PROXY_VERSION constant. (Bug #45996)

MySQL Proxy failed to work with certain versions of MySQL, including MySQL 5.1.15, where a change in the MySQL protocol existed. Now Proxy denies COM_CHANGE_USER commands when it is connected to MySQL 5.1.14 to 5.1.17 servers by sending back an error: COM_CHANGE_USER is broken on 5.1.14-.17, please upgrade the MySQL Server. (Bug #45167)

References: See also Bug #25371.

The line numbers provided in stack traces were off by one. (Bug #47348)

Due to a memory leak, memory usage for each new connection to the proxy increased, leading to very high consumption. (Bug #45272)

MySQL Proxy could incorrectly insert NULL values into the returned result set, even though non-NULL values were returned in the original query. (Bug #35729)

MySQL Proxy could stop accepting network packets if it received a large number of packets. The listen queue has been extended to permit a larger backlog. (Bug #45878, Bug #43278)