Error preloading the connection pool

Question

I am using below env:

• jdk1.6.0_21
• apache-tomcat-7.0.16
• commons-dbcp.jar (version: 1.2.2)
• commons-pool.jar (version: 1.3)
• MySql Server 5.1

Facing below exception all the time when trying to connect with DB:

Could not get JDBC Connection; nested exception is org.apache.commons.dbcp.SQLNestedException: Error preloading the connection pool

Please help.

Answer 1

As suggested by @Luiggi Mendoza in above comments:

Change all DB property (describe below) value to 10 :

• DbInitialSize
• DbMaxActive
• DbMaxIdle
• DbMaxWait