14:52:31,473 ERROR [org.jboss.as.server.deployment.scanner] (DeploymentScanner-threads - 1) {"JBAS014653: Composite operation failed and was rolled back. Steps that failed:" => {"Operation step-2" => {"JBAS014771: Services with missing/unavailable dependencies" => ["jboss.naming.context.java.dbjboss.naming.context.java.module.s3ar-ear.\"s3ar-ejb-0.0.1-SNAPSHOT\".env.dbMissing[jboss.naming.context.java.dbjboss.naming.context.java.module.s3ar-ear.\"s3ar-ejb-0.0.1-SNAPSHOT\".env.db]"]}}}

persistence.xml

<?xml version="1.0" encoding="UTF-8"?>

<persistence xmlns="http://java.sun.com/xml/ns/persistence"

          xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"

          xsi:schemaLocation="http://java.sun.com/xml/ns/persistence http://java.sun.com/xml/ns/persistence/persistence_1_0.xsd"

          version="1.0">

          <persistence-unit name="db">

          <provider>org.hibernate.ejb.HibernatePersistence</provider>

               <jta-data-source>java:jboss/datasources/S3arDataSource</jta-data-source> 

          <properties>

               <property name="hibernate.dialect" value="org.hibernate.dialect.Oracle10gDialect" />

               <property name="hibernate.show_sql" value="true" />

               <property name="hibernate.format_sql" value="true" />

               <property name="hibernate.max_fetch_depth" value="2" />

               <property name="hibernate.transaction.manager_lookup_class" value="org.hibernate.transaction.JBossTransactionManagerLookup" />

               <property name="hibernate.transaction.auto_close_session" value="false" />

               <property name="hibernate.current_session_context_class" value="jta" />

               <property name="hibernate.archive.autodetection" value="class"/>

               <property name="hibernate.cache.use_second_level_cache" value="true"/>

               <property name="hibernate.cache.use_query_cache" value="true"/>

               <property name="hibernate.generate_statistics" value="true"/>

               <property name="hibernate.cache.use_structured_entries" value="true"/>

          </properties>

      </persistence-unit>

</persistence>

module.xml

<?xml version="1.0" encoding="UTF-8"?>

<module xmlns="urn:jboss:module:1.0" name="oracle.jdbc">

          <resources>

                    <resource-root path="ojdbc6.jar"/>

          </resources>

          <dependencies>

                    <module name="javax.api"/>

                    <module name="javax.transaction.api"/>

          </dependencies>

</module>

standalone.xml

<datasource jndi-name="java:jboss/datasources/S3arDataSource" pool-name="S3arDS" enabled="true" use-java-context="true"  jta="true" use-ccm="true">

                    <connection-url>jdbc:oracle:oci:@CUPS3AR</connection-url>

                    <driver>OracleJDBCDriver</driver>

                    <security>

                        <user-name>USER_S3AR_EJB</user-name>

                        <password>EUROPA</password>

                    </security>

                </datasource>

<drivers>

                                                  <driver name="OracleJDBCDriver" module="oracle.jdbc">

                                                            <xa-datasource-class>oracle.jdbc.OracleDriver</xa-datasource-class>

                                                  </driver>

</drivers>