[1.3.3] User is reporting overcommitted pool (600 connections at the DB)

[brettwooldridge]

I recently switched my Spring RESTful API data source from DriverManagerDataSource to HikariCp, but my database connections went from 20 connections to 600 connections. Is this suppose to happen?

My settings are as follows:

<bean id="jdbcDataSource"
    class="com.zaxxer.hikari.HikariDataSource" destroy-method="shutdown">
    <constructor-arg>
        <bean class="com.zaxxer.hikari.HikariConfig">
            <constructor-arg>
                <props>
                    <prop key="dataSource.url">url</prop>
                    <prop key="dataSource.user">user</prop>
                    <prop key="dataSource.password">password</prop>
                    <prop key="dataSource.cachePrepStmts">true</prop>
                    <prop key="dataSource.prepStmtCacheSize">250</prop>
                    <prop key="dataSource.prepStmtCacheSqlLimit">2048</prop>
                    <prop key="dataSource.useServerPrepStmts">true</prop>
                </props>
            </constructor-arg>
            <property name="dataSourceClassName" value="com.mysql.jdbc.jdbc2.optional.MysqlDataSource" />
        </bean>
    </constructor-arg>
</bean>

<bean id="jdbcTemplate" class="org.springframework.jdbc.core.JdbcTemplate">
    <property name="dataSource" ref="jdbcDataSource" />
</bean>

[brettwooldridge]

This appears to be improper monitoring of MySQL and not an issue with HikariCP. Awaiting confirmation from the user on Stackoverflow.