Tomcat's connection pool opens only 20 connections to mysql
- by stck
I have a java application with following line in context.xml
<Resource
driverClassName="com.mysql.jdbc.Driver"
maxActive="100"
maxIdle="30"
initialSize="10"
maxWait="7000"
name="jdbc/app"
password="pass"
type="javax.sql.DataSource"
url="jdbc:mysql://dbhost:3306/dbname?autoReconnect=true"
username="user"
validationQuery="SELECT 1"
removeAbandoned="true"
removeAbandonedTimeout="30"
logAbandoned="true"
/>
In mysql 'show variables' tells me that max_connections is 151.
Still,
use information_schema;
select count(*) from processlist where User = 'user';
never shows me more than 20 connections. On tomcat's catalina.out -log I get
Caused by: org.apache.tomcat.dbcp.dbcp.SQLNestedException: Cannot get a connection, pool exhausted
at org.apache.tomcat.dbcp.dbcp.PoolingDataSource.getConnection(PoolingDataSource.java:103)
at org.apache.tomcat.dbcp.dbcp.BasicDataSource.getConnection(BasicDataSource.java:540)
at org.springframework.jdbc.datasource.DataSourceUtils.doGetConnection(DataSourceUtils.java:113)
at org.springframework.jdbc.datasource.DataSourceUtils.getConnection(DataSourceUtils.java:79)
What should I check for to find the problem?
