Mysql password expiration causes the connection not to Mysql_mysql

MySQL password expired, today encountered a connection to MySQL, always connected not up,
Error Symptom 1:
An attempt by a client to checkout a Connection has timed out
The first time a connection timeout error occurred, the first reaction is to modify the Cpool.checkouttimeout parameter is 18000, initially 500, the result is still wrong,
Modified to 36000, and increased the number of C3P0 connections cpool.maxpoolsize=100

The following error occurred at this time 2
Connections could not is acquired from the underlying database!
has not been positioned out, rely on, suddenly remembered that the Oracle 11g password has expired problem, MySQL will not have it, try, how to do not write more, see my blog
http://blog.csdn.net/dracotianlong/article/details/8100235
After the modification, restart MySQL and Tomcat, it's done. It is estimated that the reason for the virtual machine, Google, did not find a more official description.