BasicDataSource causing java.util.ConcurrentModificationException in WebSphere

Problem

With Spring, declares data source as “org.apache.commons.dbcp.BasicDataSource“. When deployed to WebSphere, everything work perfectly.

File : spring-datasource.xml

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
       xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
       xsi:schemaLocation="http://www.springframework.org/schema/beans
       http://www.springframework.org/schema/beans/spring-beans-2.5.xsd
">

    <bean 
       class="org.springframework.beans.factory.config.PropertyPlaceholderConfigurer">
       <property name="location">
           <value>classpath:config/database/database.properties</value>
       </property>
    </bean>

    <bean id="dataSource" class="org.apache.commons.dbcp.BasicDataSource" 
         destroy-method="close">
        <property name="driverClassName" value="${jdbc.driverClassName}" />
	<property name="url" value="${jdbc.url}" />
	<property name="username" value="${jdbc.username}" />
	<property name="password" value="${jdbc.password}" />
    </bean>

</beans>

However, when restart the web application in WebSphere, it get following exception :

org.springframework.beans.factory.BeanCreationException: 
Error creating bean with name 'dataSource' defined in class path resource 
[config/database/spring/spring-datasource.xml]: Instantiation of bean failed; 
......
Caused by: java.lang.ExceptionInInitializerError
	at java.lang.J9VMInternals.initialize(J9VMInternals.java:222)
	at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
	... 114 more
Caused by: java.util.ConcurrentModificationException
	at java.util.AbstractList$SimpleListIterator.next(Unknown Source)
	at java.sql.DriverManager.getDrivers(Unknown Source)
	at org.apache.commons.dbcp.BasicDataSource.<clinit>(BasicDataSource.java:57)
	at java.lang.J9VMInternals.initializeImpl(Native Method)
	at java.lang.J9VMInternals.initialize(J9VMInternals.java:200)
	... 121 more

Look like the datasource (BasicDataSource) is causing “java.util.ConcurrentModificationException“.

Solution

You need to use WebSphere data source, not “org.apache.commons.dbcp.BasicDataSource“. To fix it, just register a WebSphere data source, and put jndi name like “jdbc/anythingDS“. In Spring, declares jdni datasource like this :

File : spring-datasource.xml

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
       xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
       xsi:schemaLocation="http://www.springframework.org/schema/beans
       http://www.springframework.org/schema/beans/spring-beans-2.5.xsd
">

    <bean id="dataSource" class="org.springframework.jndi.JndiObjectFactoryBean">
        <property name="jndiName" value="jdbc/anythingDS"/>
        <property name="lookupOnStartup" value="false"/>
        <property name="cache" value="true"/>
        <property name="proxyInterface" value="javax.sql.DataSource"/>
    </bean>

</beans>

In WebSphere development, you have to follow WebSphere way of doing things.