camel-sql consumer DB connection issue - oracle

Question

I am using Apache Camel with Spring boot. I am using my spring boot app as jar without any server.
In app I am having a Camel-SQL consumer route with delay of 1000. This consumer then further calls other route which use splitter and parallel processing.
Through Jprofiler I have observed that my DB connection are not getting closed which are opened through consumer.
I also have dbcp2 settings in application.properties and using Oracle DB. I am observing this connection issue for the first time. Did anyone also faced the same issue at anytime? Or do I need to add any other configuration.
Any help will be appreciated.

Answer 1

Here is one of my Oracle configurations:
<cm:property-placeholder id="server.placeholder" persistent-id="name.of.company.datasource">
<cm:default-properties>
<cm:property name="db.host" value="host"/>
<cm:property name="db.port" value="1521"/>
<cm:property name="db.instance" value="dbname"/>
<cm:property name="db.user" value="user"/>
<cm:property name="db.password" value="password"/>
<cm:property name="driverClassName" value="oracle.jdbc.pool.OracleDataSource" />
<cm:property name="validationQuery" value="SELECT 1 FROM DUAL" />
<cm:property name="defaultReadOnly" value="false" />
<cm:property name="defaultAutoCommit" value="true" />
<cm:property name="maxActive" value="100" />
<cm:property name="whenExhaustedAction" value="2" />
<cm:property name="maxWait" value="-1" />
<cm:property name="maxIdle" value="8" />
<cm:property name="minIdle" value="1" />
<cm:property name="testOnBorrow" value="true" />
<cm:property name="testOnReturn" value="true" />
<cm:property name="timeBetweenEvictionRunsMillis" value="-1" />
<cm:property name="numTestsPerEvictionRun" value="3" />
<cm:property name="minEvictableIdleTimeMillis" value="1800000" />
<cm:property name="testWhileIdle" value="false" />
<cm:property name="softMinEvictableIdleTimeMillis" value="-1" />
<cm:property name="lifo" value="true" />
</cm:default-properties>
</cm:property-placeholder>
<bean id="dataSource" class="org.apache.commons.dbcp.BasicDataSource" destroy-method="close">
<property name="driverClassName" value= "${driverClassName}" />
<property name="url" value="jdbc:oracle:thin:#${db.host}:${db.port}:${db.instance}" />
<property name="username" value="${db.user}" />
<property name="password" value="${db.password}" />
<property name="maxIdle" value="1" />
</bean>
<bean id="connectionFactory" class="org.apache.commons.dbcp.DataSourceConnectionFactory">
<argument ref="dataSource" />
</bean>
<bean id="connectionPool" class="org.apache.commons.pool.impl.GenericObjectPool" >
<argument><null/></argument>
<argument value="${maxActive}" />
<argument value="${whenExhaustedAction}" />
<argument value="${maxWait}" />
<argument value="${maxIdle}" />
<argument value="${minIdle}" />
<argument value="${testOnBorrow}" />
<argument value="${testOnReturn}" />
<argument value="${timeBetweenEvictionRunsMillis}" />
<argument value="${numTestsPerEvictionRun}" />
<argument value="${minEvictableIdleTimeMillis}" />
<argument value="${testWhileIdle}" />
<argument value="${softMinEvictableIdleTimeMillis}" />
<argument value="${lifo}" />
</bean>
<bean id="pooledConnectionFactory" class="org.apache.commons.dbcp.PoolableConnectionFactory" >
<argument ref="connectionFactory" />
<argument ref="connectionPool" />
<argument><null/></argument>
<argument value="${validationQuery}" />
<argument value="${defaultReadOnly}" />
<argument value="${defaultAutoCommit}" />
</bean>
<bean id="poolingDataSource" class="org.apache.commons.dbcp.PoolingDataSource" depends-on="pooledConnectionFactory">
<argument ref="connectionPool" />
</bean>
<service interface="javax.sql.DataSource" ref="poolingDataSource">
<service-properties>
<entry key="osgi.jndi.service.name" value="jdbc/oracle/db"/>
<entry key="datasource.name" value="jdbc/oracle/db" />
</service-properties>
</service>
Maybe it will help you.
I think DB connection just doesn't have time to go back to the pool between queries.
You need to configure the connection timeout and similar parameters (idle params, minEvictableIdleTimeMillis, timeBetweenEvictionRunsMillis, numTestsPerEvictionRun).