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HibernateException: Dialect class not found in HBM2DDL ant task
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created by <a href="https://community.jboss.org/people/saemmy2011">Saemmy -</a> in <i>JBoss Tools</i> - <a href="https://community.jboss.org/message/763934#763934">View the full discussion</a>
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<div class="jive-rendered-content"><p>Hi,</p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>I am using <hbm2ddl> ant task for exporting DDL schema. My ant script worked fine for Hibernate 3.6 and Hibernate Tools 3.x.</p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>After upgading to Hibernate 4 and Hibernate Tools 4 I get the following exception:</p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>[hibernatetool] 2012-10-09 15:54:32,327 INFO  [Version.<clinit>(15)] : Hibernate Tools 4.0.0</p><p>[hibernatetool] 2012-10-09 15:54:32,390 WARN  [ConnectionProviderInitiator.initiateService(143)] : HHH000181: No appropriate connection provider encountered, assuming application will be supplying connections</p><p>[hibernatetool] An exception occurred while running exporter #2:hbm2ddl (Generates database schema)</p><p>[hibernatetool] To get the full stack trace run ant with -verbose</p><p>[hibernatetool] org.hibernate.HibernateException: Dialect class not found: com.mycompany.myproduct.integration.dao.hibernate.Oracle10nDialect</p><p>[hibernatetool] org.hibernate.service.classloading.spi.ClassLoadingException: Unable to load class [com.mycompany.myproduct.integration.dao.hibernate.Oracle10nDialect]</p><p>[hibernatetool] java.lang.ClassNotFoundException: Could not load requested class : com.mycompany.myproduct.integration.dao.hibernate.Oracle10nDialect</p><p>[hibernatetool] A class were not found in the classpath of the Ant task.</p><p>[hibernatetool] Ensure that the classpath contains the classes needed for Hibernate and your code are in the classpath.</p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>BUILD FAILED</p><p>C:\Projekte\MyProduct\workspace-sts-trunk\MyProductWeb-dev\build.xml:143: org.hibernate.HibernateException: Dialect class not found: com.mycompany.myproduct.integration.dao.hibernate.Oracle10nDialect</p><p>    at org.hibernate.tool.ant.HibernateToolTask.reportException(HibernateToolTask.java:226)</p><p>    at org.hibernate.tool.ant.HibernateToolTask.execute(HibernateToolTask.java:189)</p><p>    at org.apache.tools.ant.UnknownElement.execute(UnknownElement.java:291)</p><p>    at sun.reflect.GeneratedMethodAccessor4.invoke(Unknown Source)</p><p>    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)</p><p>    at java.lang.reflect.Method.invoke(Method.java:597)</p><p>    at org.apache.tools.ant.dispatch.DispatchUtils.execute(DispatchUtils.java:106)</p><p>    at org.apache.tools.ant.Task.perform(Task.java:348)</p><p>    at org.apache.tools.ant.Target.execute(Target.java:392)</p><p>    at org.apache.tools.ant.Target.performTasks(Target.java:413)</p><p>    at org.apache.tools.ant.Project.executeSortedTargets(Project.java:1399)</p><p>    at org.apache.tools.ant.Project.executeTarget(Project.java:1368)</p><p>    at org.apache.tools.ant.helper.DefaultExecutor.executeTargets(DefaultExecutor.java:41)</p><p>    at org.eclipse.ant.internal.launching.remote.EclipseDefaultExecutor.executeTargets(EclipseDefaultExecutor.java:32)</p><p>    at org.apache.tools.ant.Project.executeTargets(Project.java:1251)</p><p>    at org.eclipse.ant.internal.launching.remote.InternalAntRunner.run(InternalAntRunner.java:424)</p><p>    at org.eclipse.ant.internal.launching.remote.InternalAntRunner.main(InternalAntRunner.java:138)</p><p>Caused by: org.hibernate.HibernateException: Dialect class not found: com.mycompany.myproduct.integration.dao.hibernate.Oracle10nDialect</p><p>    at org.hibernate.service.jdbc.dialect.internal.DialectFactoryImpl.constructDialect(DialectFactoryImpl.java:76)</p><p>    at org.hibernate.service.jdbc.dialect.internal.DialectFactoryImpl.buildDialect(DialectFactoryImpl.java:64)</p><p>    at org.hibernate.engine.jdbc.internal.JdbcServicesImpl.configure(JdbcServicesImpl.java:174)</p><p>    at org.hibernate.service.internal.StandardServiceRegistryImpl.configureService(StandardServiceRegistryImpl.java:75)</p><p>    at org.hibernate.service.internal.AbstractServiceRegistryImpl.initializeService(AbstractServiceRegistryImpl.java:159)</p><p>    at org.hibernate.service.internal.AbstractServiceRegistryImpl.getService(AbstractServiceRegistryImpl.java:131)</p><p>    at org.hibernate.tool.hbm2ddl.SchemaExport.<init>(SchemaExport.java:113)</p><p>    at org.hibernate.tool.hbm2x.Hbm2DDLExporter.doStart(Hbm2DDLExporter.java:164)</p><p>    at org.hibernate.tool.hbm2x.AbstractExporter.start(AbstractExporter.java:95)</p><p>    at org.hibernate.tool.ant.ExporterTask.execute(ExporterTask.java:40)</p><p>    at org.hibernate.tool.ant.HibernateToolTask.execute(HibernateToolTask.java:186)</p><p>    ... 15 more</p><p>Caused by: org.hibernate.service.classloading.spi.ClassLoadingException: Unable to load class [com.mycompany.myproduct.integration.dao.hibernate.Oracle10nDialect]</p><p>    at org.hibernate.service.classloading.internal.ClassLoaderServiceImpl.classForName(ClassLoaderServiceImpl.java:141)</p><p>    at org.hibernate.service.jdbc.dialect.internal.DialectFactoryImpl.constructDialect(DialectFactoryImpl.java:73)</p><p>    ... 25 more</p><p>Caused by: java.lang.ClassNotFoundException: Could not load requested class : com.mycompany.myproduct.integration.dao.hibernate.Oracle10nDialect</p><p>    at org.hibernate.service.classloading.internal.ClassLoaderServiceImpl$1.findClass(ClassLoaderServiceImpl.java:99)</p><p>    at java.lang.ClassLoader.loadClass(ClassLoader.java:306)</p><p>    at java.lang.ClassLoader.loadClass(ClassLoader.java:247)</p><p>    at java.lang.Class.forName0(Native Method)</p><p>    at java.lang.Class.forName(Class.java:247)</p><p>    at org.hibernate.service.classloading.internal.ClassLoaderServiceImpl.classForName(ClassLoaderServiceImpl.java:138)</p><p>    ... 26 more</p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p><strong>Here is the part of my ant script:</strong></p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p><target name="schemaexport" depends="clean, compile"></p><p>        <taskdef name="hibernatetool" classname="org.hibernate.tool.ant.HibernateToolTask" classpathref="build.classpath" /></p><p>        <mkdir dir="${target.dir}/sql"/></p><p>        </p><p>        <hibernatetool destdir="${target.dir}/sql"></p><p>            <classpath></p><p>                <path location="${build.dir}"/></p><p>            </classpath></p><p>            <configuration configurationfile="${build.dir}/hibernate.cfg.xml"/></p><p>            <hbm2ddl</p><p>                export="false"</p><p>                drop="true"</p><p>                outputfilename="DB-create.sql"</p><p>                delimiter=";"</p><p>                format="true"</p><p>            /></p><p>        </hibernatetool></p><p>    </target></p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>The build.dir includes all class files, including the Oracle 10 dialect.</p><p>Did something change in the configuration of hbm2dll in Hibernate Tools 4? Or is this a bug in Hibernate Tools 4?</p></div>
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