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POClassCastException in JPA Entitiy after redeploy (Glassfish 3.1.2)
 

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  1. POClassCastException in JPA Entitiy after redeploy (Glassfish 3.1.2)
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    <p>I have a strange effect when undeploying and deploying a WebArchive (.war) with Glassfish 3.1.2.</p> <pre><code>$ asadmin undeploy myWebApp; asadmin deploy target/myWebApp.war </code></pre> <p>It deploys normally, but when I fetch an entity bean via the entity manager, it throws an Exception: <code>[#|2012-12-11T15:26:09.772+0100|SEVERE|glassfish3.1.2|javax.enterprise.system.std.com.sun.enterprise.server.logging|_ThreadID=119;_ThreadName=Thread-2;|java.lang.ClassCastException: org.YourEntity cannot be cast to org.YourEntity</code></p> <p>The exception is thrown in the q.getSingleResult() call.</p> <pre><code> @PersistenceContext(unitName = "org.my-PU") private EntityManager em = Persistence.createEntityManagerFactory("org.my-PU").createEntityManager(); ... public YourEntity findYourEntity() throws Exception { TypedQuery&lt;YourEntity&gt; q = em.createQuery("select ye from YourEntity ye", YourEntity.class); return q.getSingleResult(); } </code></pre> <p>I am using the following JPA related dependencies in the project:</p> <pre><code>&lt;dependency&gt; &lt;groupId&gt;org.eclipse.persistence&lt;/groupId&gt; &lt;artifactId&gt;javax.persistence&lt;/artifactId&gt; &lt;version&gt;2.0.0&lt;/version&gt; &lt;/dependency&gt; &lt;dependency&gt; &lt;groupId&gt;org.eclipse.persistence&lt;/groupId&gt; &lt;artifactId&gt;eclipselink&lt;/artifactId&gt; &lt;version&gt;2.0.2&lt;/version&gt; &lt;/dependency&gt; &lt;dependency&gt; &lt;groupId&gt;com.oracle&lt;/groupId&gt; &lt;artifactId&gt;ojdbc6&lt;/artifactId&gt; &lt;version&gt;11.1.0.7.0&lt;/version&gt; &lt;/dependency&gt; </code></pre> <p>When I restart the glassfish, the exception does not occur any more. I have never seen the problem when undeploying/deploying an .ear with similar settings. Has anybody seen the error and knows how to overcome it? It is not a big problem, but annoying.</p>
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