Root exception is java.lang.ClassNotFoundException?: org.apache.commons.dbcp.BasicDataSourceFactory?:

according to this : ​http://mail-archives.apache.org/mod_mbox/tomcat-users/200903.mbox/%3Ca2d59f0d0903031254h78e097b5u66cb2639f82166dd@mail.gmail.com%3E

there is a problem in context.xml :

<!--<Context path="/molgenis" docBase="molgenis4mpd" debug="5" reloadable="true" crossContext="true">		
	<Resource 
		name="jdbc/molgenisdb" 
		auth="Container" 
		factory="org.apache.commons.dbcp.BasicDataSourceFactory" 
		type="javax.sql.DataSource" 
		username="molgenis"
		password="molgenis" 
		driverClassName="com.mysql.jdbc.Driver" 
		url="jdbc:mysql://localhost/bbmri_new" 
		removeAbandoned="true"
		maxActive="8" 
		maxIdle="4"/>		
</Context>-->