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    <p>Great question; this isn't covered well in the OpenJPA documentation. What you need to do is use the special "java:comp/env/..." syntax for the "openjpa.ConnectionFactoryName" property to ask OpenJPA to retrieve the connection parameters from JNDI. For example, your persistence.xml should look something like this:</p> <pre><code>&lt;?xml version="1.0"?&gt; &lt;persistence&gt; &lt;persistence-unit name="openjpa"&gt; &lt;provider&gt;org.apache.openjpa.persistence.PersistenceProviderImpl&lt;/provider&gt; &lt;class&gt;tutorial.Animal&lt;/class&gt; &lt;class&gt;tutorial.Dog&lt;/class&gt; &lt;class&gt;tutorial.Rabbit&lt;/class&gt; &lt;class&gt;tutorial.Snake&lt;/class&gt; &lt;properties&gt; &lt;property name="openjpa.ConnectionFactoryName" value="java:comp/env/jdbc/myjndi"/&gt; &lt;property name="openjpa.Log" value="DefaultLevel=WARN, Tool=INFO"/&gt; &lt;/properties&gt; &lt;/persistence-unit&gt; &lt;/persistence&gt; </code></pre> <p>This will request a jndi resource called "myjndi" from the container. If you're using Tomcat, you would have a context.xml that looks something like this:</p> <pre><code>&lt;?xml version='1.0' encoding='UTF-8'?&gt; &lt;Context&gt; &lt;Resource name="jdbc/myjndi" auth="Container" scope="Shareable" type="javax.sql.DataSource" maxActive="100" maxIdle="30" maxWait="10000" removeAbandoned="true" username="username" password="password" driverClassName="com.mysql.jdbc.Driver" url="jdbc:mysql://localhost:3306/DBNAME?characterEncoding=UTF-8" /&gt; &lt;/Context&gt; </code></pre> <p>Change the JNDI parameters above as required for your database.</p>
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    1. COThanks Templar. Unfortunately this hasn't resolved the problem. I am using openjpa on ibm websphere, my jndiname is A/B. I am now using <properties> <property name="openjpa.ConnectionFactoryName" value="java:comp/env/A/B"/> </properties> I get the following exception: A JDBC Driver or DataSource class name must be specified in the ConnectionDriverName property.
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    2. COwhen I specify ConnectionDriverName property, then it throws exception for username and password
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