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    Re: ClassCastException
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    created by <a href="https://community.jboss.org/people/hnb">Pierre Guillemot</a> in <i>Datasource Configuration</i> - <a href="https://community.jboss.org/message/716014#716014">View the full discussion</a>
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<div class="jive-rendered-content"><p>Here is the persistence.xml :</p><p style="min-height: 8pt; height: 8pt; padding: 0px;">&#160;</p><pre class="jive-pre"><code class="jive-code jive-xml"><span class="jive-xml-tag">&lt;?xml version="1.0" encoding="UTF-8"?&gt;</span>
<span class="jive-xml-tag"><span>&lt;persistence version="2.0" xmlns="</span><a class="jive-link-external-small" href="http://java.sun.com/xml/ns/persistence" target="_blank">http://java.sun.com/xml/ns/persistence</a><span>" xmlns:xsi="</span><a class="jive-link-external-small" href="http://www.w3.org/2001/XMLSchema-instance" target="_blank">http://www.w3.org/2001/XMLSchema-instance</a><span>" xsi:schemaLocation="</span><a class="jive-link-external-small" href="http://java.sun.com/xml/ns/persistence" target="_blank">http://java.sun.com/xml/ns/persistence</a><span> </span><a class="jive-link-external-small" href="http://java.sun.com/xml/ns/persistence/persistence_2_0.xsd" target="_blank">http://java.sun.com/xml/ns/persistence/persistence_2_0.xsd</a><span>"&gt;</span></span>
&#160; <span class="jive-xml-tag">&lt;persistence-unit name="YouFoodIncPU" transaction-type="JTA"&gt;</span>
&#160;&#160;&#160; <span class="jive-xml-tag">&lt;provider&gt;</span>org.hibernate.ejb.HibernatePersistence<span class="jive-xml-tag">&lt;/provider&gt;</span>
&#160;&#160;&#160; <span class="jive-xml-tag">&lt;jta-data-source&gt;</span>java:/MySqlDS<span class="jive-xml-tag">&lt;/jta-data-source&gt;</span>
&#160;&#160;&#160; <span class="jive-xml-tag">&lt;properties&gt;</span>
&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160; <span class="jive-xml-tag">&lt;property name="hibernate.hbm2ddl.auto" value="update"/&gt;</span>
&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160; <span class="jive-xml-tag">&lt;property name="hibernate.archive.autodetection" value="class" /&gt;</span>
&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160; <span class="jive-xml-tag">&lt;property name="hibernate.show_sql" value="false" /&gt;</span>
&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160; <span class="jive-xml-tag">&lt;property name="hibernate.format_sql" value="true" /&gt;</span>
&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160; <span class="jive-xml-tag">&lt;property name="use_sql_comments" value="true" /&gt;</span>
&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160; <span class="jive-xml-tag">&lt;property name="hibernate.dialect" value="org.hibernate.dialect.MySQLInnoDBDialect" /&gt;</span>
&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160; <span class="jive-xml-tag">&lt;property name="jboss.entity.manager.factory.jndi.name" value="java:/MySqlDs" /&gt;</span>
&#160;&#160;&#160; <span class="jive-xml-tag">&lt;/properties&gt;</span>
&#160; <span class="jive-xml-tag">&lt;/persistence-unit&gt;</span>
<span class="jive-xml-tag">&lt;/persistence&gt;</span>
</code></pre><p style="min-height: 8pt; height: 8pt; padding: 0px;">&#160;</p><p>And the MySqlDs.xml with obviously the password modified :</p><p style="min-height: 8pt; height: 8pt; padding: 0px;">&#160;</p><pre class="jive-pre"><code class="jive-code jive-xml"><span class="jive-xml-tag">&lt;datasources&gt;</span>
&#160; <span class="jive-xml-tag">&lt;local-tx-datasource&gt;</span>
&#160;&#160;&#160; <span class="jive-xml-tag">&lt;jndi-name&gt;</span>MySqlDS<span class="jive-xml-tag">&lt;/jndi-name&gt;</span>
&#160;&#160;&#160; <span class="jive-xml-tag">&lt;connection-url&gt;</span>jdbc:mysql://localhost:3306/youfoodincdb<span class="jive-xml-tag">&lt;/connection-url&gt;</span>
&#160;&#160;&#160; <span class="jive-xml-tag">&lt;driver-class&gt;</span>com.mysql.jdbc.Driver<span class="jive-xml-tag">&lt;/driver-class&gt;</span>
&#160;&#160;&#160; <span class="jive-xml-tag">&lt;user-name&gt;</span>root<span class="jive-xml-tag">&lt;/user-name&gt;</span>
&#160;&#160;&#160; <span class="jive-xml-tag">&lt;password&gt;</span>password<span class="jive-xml-tag">&lt;/password&gt;</span>
&#160;&#160;&#160; <span class="jive-xml-tag">&lt;exception-sorter-class-name&gt;</span>org.jboss.resource.adapter.jdbc.vendor.MySQLExceptionSorter<span class="jive-xml-tag">&lt;/exception-sorter-class-name&gt;</span>
&#160;&#160;&#160; <span class="jive-xml-comment">&lt;!-- should only be used on drivers after 3.22.1 with "ping" support
&#160;&#160;&#160; <span class="jive-xml-tag">&lt;valid-connection-checker-class-name&gt;</span>org.jboss.resource.adapter.jdbc.vendor.MySQLValidConnectionChecker<span class="jive-xml-tag">&lt;/valid-connection-checker-class-name&gt;</span>
&#160;&#160;&#160; --&gt;
&#160;&#160;&#160; &lt;!-- sql to call when connection is created
&#160;&#160;&#160; <span class="jive-xml-tag">&lt;new-connection-sql&gt;</span>some arbitrary sql<span class="jive-xml-tag">&lt;/new-connection-sql&gt;</span>
&#160;&#160;&#160;&#160;&#160; --&gt;
&#160;&#160;&#160; &lt;!-- sql to call on an existing pooled connection when it is obtained from pool - MySQLValidConnectionChecker is preferred for newer drivers
&#160;&#160;&#160; <span class="jive-xml-tag">&lt;check-valid-connection-sql&gt;</span>some arbitrary sql<span class="jive-xml-tag">&lt;/check-valid-connection-sql&gt;</span>
&#160;&#160;&#160;&#160;&#160; --&gt;

&#160;&#160;&#160; &lt;!-- corresponding type-mapping in the standardjbosscmp-jdbc.xml (optional) --&gt;</span>
&#160;&#160;&#160; <span class="jive-xml-tag">&lt;metadata&gt;</span>
&#160;&#160;&#160;&#160;&#160;&#160; <span class="jive-xml-tag">&lt;type-mapping&gt;</span>mySQL<span class="jive-xml-tag">&lt;/type-mapping&gt;</span>
&#160;&#160;&#160; <span class="jive-xml-tag">&lt;/metadata&gt;</span>
&#160; <span class="jive-xml-tag">&lt;/local-tx-datasource&gt;</span>
<span class="jive-xml-tag">&lt;/datasources&gt;</span>
</code></pre><p style="min-height: 8pt; height: 8pt; padding: 0px;">&#160;</p><p>I can access the (empty) database through mysql console.</p><p style="min-height: 8pt; height: 8pt; padding: 0px;">&#160;</p><p>I just want to check my connection with my datasource, i still haven't coded any entities or daos. I want to make it work first.</p><p style="min-height: 8pt; height: 8pt; padding: 0px;">&#160;</p><p>Thanks for your help.</p></div>

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    <p style="margin: 0;">Reply to this message by <a href="https://community.jboss.org/message/716014#716014">going to Community</a></p>
        <p style="margin: 0;">Start a new discussion in Datasource Configuration at <a href="https://community.jboss.org/choose-container!input.jspa?contentType=1&containerType=14&container=2077">Community</a></p>
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