[jetty-user] Hibernate ClassCastException in Jetty mode only

Hello and thanks for watching ;-)



Our problem/error is:



*javax.persistence.**PersistenceException**: [PersistenceUnit: PUname]
Unable to build EntityManagerFactory*

*...
Caused by: org.hibernate.**HibernateException**: Could not instantiate
dialect class*

*...
Caused by: java.lang.**ClassCastException**:
org.hibernate.dialect.MySQLDialect cannot be cast to
org.hibernate.dialect.Dialect*

*...*

(see full stack trace at the bottom)



It occurs in a GWT based web application using the following technologies:


   - ·         Maven
   - ·         Hibernate EntityManager /JPA
   - ·         Guice
   - ·         GWT
   - ·         GWT-P
   - ·         GWT Maven Plugin
   - ·         ...



The fact to stress is that it does work in Tomcat.

Only in development mode aka hosted mode (with Jetty), using GWT Maven
Plugin (with goal gwt:run), we get the ClassCastException. We were playing
with Hibernate dependencies without luck.

The ClassCastException is thrown on startup of JPA before any service is
actually used.

BTW: JPA is setup using Guice:

        install(*new* JpaPersistModule("PUname"));

        filter("/*").through(PersistFilter.*class*);



It may be worth mentioning that disabling the dialect setting (in
persistence.xml) creates another ClassCastException also on JPA startup:

javax.persistence.PersistenceException: [PersistenceUnit: dsmgmt]
Unable to build EntityManagerFactory

...

Caused by: org.hibernate.HibernateException: Unable to instantiate
specified TransactionFactory class
[org.hibernate.engine.transaction.internal.jdbc.JdbcTransactionFactory]

...

Caused by: java.lang.ClassCastException:
org.hibernate.engine.transaction.internal.jdbc.JdbcTransactionFactory
cannot be cast to
org.hibernate.engine.transaction.spi.TransactionFactory

...



Why does it break in Jetty? What could be causing it or how can it be fixed?



File: META-INF/persistence.xml

<persistence xmlns="http://java.sun.com/xml/ns/persistence" xmlns:xsi="
http://www.w3.org/2001/XMLSchema-instance" version="1.0" xsi:schemaLocation
="http://java.sun.com/xml/ns/persistence
http://java.sun.com/xml/ns/persistence/persistence_1_0.xsd">

            <persistence-unit name="PUname" transaction-type="RESOURCE_LOCAL
">

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

                        <class>our.test.class</class>

                        <properties>

                                   <property name="
hibernate.connection.username" value="user"/>

                                   <property name="
hibernate.connection.password" value="pass"/>

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

                                   <property
name="hibernate.connection.url"value
="jdbc:mysql://machine:3306/db"/>

                                   <property name="
hibernate.connection.driver_class" value="com.mysql.jdbc.Driver"/>

                                   <property name="hibernate.hbm2ddl.auto"value
="update"/>

                        </properties>

            </persistence-unit>

</persistence>



Our JARs in the webapp:

           445.288 antlr-2.7.7.jar

           150.774 antlr-runtime-3.1.3.jar

             4.467 aopalliance-1.0.jar

            57.963 classmate-0.5.4.jar

           575.389 commons-collections-3.2.1.jar

            52.543 commons-exec-1.1.jar

            59.590 commons-fileupload-1.2.2.jar

           163.151 commons-io-2.1.jar

           284.220 commons-lang-2.6.jar

           313.898 dom4j-1.6.1.jar

           131.929 dsmgmt-shared-0.1-SNAPSHOT.jar

         1.006.424 ehcache-core-2.4.3.jar

           710.492 guice-3.0.jar

            36.998 guice-assistedinject-3.0.jar

            27.633 guice-persist-3.0.jar

            65.012 guice-servlet-3.0.jar

         5.004.997 gwt-servlet-2.3.0.jar

            28.339 gwtp-dispatch-server-0.6.jar

            17.184 gwtp-dispatch-server-guice-0.6.jar

            30.402 gwtp-dispatch-shared-0.6.jar

            81.426 hibernate-commons-annotations-4.0.0.Final.jar

         4.347.499 hibernate-core-4.0.0.CR6.jar

           127.259 hibernate-ehcache-4.0.0.CR6.jar

           471.832 hibernate-entitymanager-4.0.0.CR6.jar

           102.661 hibernate-jpa-2.0-api-1.0.1.Final.jar

           366.592 hibernate-validator-4.2.0.Final.jar

            70.928 jandex-1.0.3.Final.jar

           644.148 javassist-3.12.1.GA.jar

             2.497 javax.inject-1.jar

            60.542 jboss-logging-3.1.0.CR1.jar

            11.209 jboss-transaction-api_1.1_spec-1.0.0.Final.jar

           859.016 jna-3.2.3.jar

           213.781 jsch-0.1.44-1.jar

           281.579 jsoup-1.6.1.jar

           481.535 log4j-1.2.16.jar

           789.885 mysql-connector-java-5.1.18.jar

         1.351.561 org.eclipse.jgit-1.0.0.201106090707-r.jar

           601.287 pd4ml-3.80b1.jar

           149.846 pd4ml-ss-css-3.80b1.jar

            25.962 slf4j-api-1.6.4.jar

             9.748 slf4j-log4j12-1.6.4.jar

           743.673 sqljet-1.0.4.jar

           172.023 stringtemplate-3.2.jar

         1.889.196 svnkit-1.3.5.jar

           251.371 trilead-ssh2-build213-svnkit-1.3-patch.jar

            47.433 validation-api-1.0.0.GA.jar

           109.318 xml-apis-1.0.b2.jar



The full stacktrace:

javax.persistence.PersistenceException: [PersistenceUnit: PUname] Unable to
build EntityManagerFactory
       at
org.hibernate.ejb.Ejb3Configuration.buildEntityManagerFactory(Ejb3Configuration.java:916)
       at
org.hibernate.ejb.Ejb3Configuration.buildEntityManagerFactory(Ejb3Configuration.java:887)
       at
org.hibernate.ejb.HibernatePersistence.createEntityManagerFactory(HibernatePersistence.java:56)
       at
javax.persistence.Persistence.createEntityManagerFactory(Persistence.java:63)
       at
javax.persistence.Persistence.createEntityManagerFactory(Persistence.java:47)
       at
com.google.inject.persist.jpa.JpaPersistService.start(JpaPersistService.java:94)
       at
com.google.inject.persist.PersistFilter.init(PersistFilter.java:77)
       at
com.google.inject.servlet.FilterDefinition.init(FilterDefinition.java:114)
       at
com.google.inject.servlet.ManagedFilterPipeline.initPipeline(ManagedFilterPipeline.java:98)
       at com.google.inject.servlet.GuiceFilter.init(GuiceFilter.java:172)
       at
org.mortbay.jetty.servlet.FilterHolder.doStart(FilterHolder.java:97)
       at
org.mortbay.component.AbstractLifeCycle.start(AbstractLifeCycle.java:39)
       at
org.mortbay.jetty.servlet.ServletHandler.initialize(ServletHandler.java:593)
       at org.mortbay.jetty.servlet.Context.startContext(Context.java:140)
       at
org.mortbay.jetty.webapp.WebAppContext.startContext(WebAppContext.java:1220)
       at
org.mortbay.jetty.handler.ContextHandler.doStart(ContextHandler.java:513)
       at
org.mortbay.jetty.webapp.WebAppContext.doStart(WebAppContext.java:448)
       at
com.google.gwt.dev.shell.jetty.JettyLauncher$WebAppContextWithReload.doStart(JettyLauncher.java:468)
       at
org.mortbay.component.AbstractLifeCycle.start(AbstractLifeCycle.java:39)
       at
org.mortbay.jetty.handler.HandlerWrapper.doStart(HandlerWrapper.java:130)
       at
org.mortbay.jetty.handler.RequestLogHandler.doStart(RequestLogHandler.java:115)
       at
org.mortbay.component.AbstractLifeCycle.start(AbstractLifeCycle.java:39)
       at
org.mortbay.jetty.handler.HandlerWrapper.doStart(HandlerWrapper.java:130)
       at org.mortbay.jetty.Server.doStart(Server.java:222)
       at
org.mortbay.component.AbstractLifeCycle.start(AbstractLifeCycle.java:39)
       at
com.google.gwt.dev.shell.jetty.JettyLauncher.start(JettyLauncher.java:672)
       at com.google.gwt.dev.DevMode.doStartUpServer(DevMode.java:509)
       at com.google.gwt.dev.DevModeBase.startUp(DevModeBase.java:1068)
       at com.google.gwt.dev.DevModeBase.run(DevModeBase.java:811)
       at com.google.gwt.dev.DevMode.main(DevMode.java:311)
Caused by: org.hibernate.HibernateException: Could not instantiate dialect
class
       at
org.hibernate.service.jdbc.dialect.internal.DialectFactoryImpl.constructDialect(DialectFactoryImpl.java:82)
       at
org.hibernate.service.jdbc.dialect.internal.DialectFactoryImpl.buildDialect(DialectFactoryImpl.java:64)
       at
org.hibernate.engine.jdbc.internal.JdbcServicesImpl.configure(JdbcServicesImpl.java:142)
       at
org.hibernate.service.internal.StandardServiceRegistryImpl.configureService(StandardServiceRegistryImpl.java:81)
       at
org.hibernate.service.internal.AbstractServiceRegistryImpl.initializeService(AbstractServiceRegistryImpl.java:160)
       at
org.hibernate.service.internal.AbstractServiceRegistryImpl.getService(AbstractServiceRegistryImpl.java:133)
       at
org.hibernate.cfg.SettingsFactory.buildSettings(SettingsFactory.java:71)
       at
org.hibernate.cfg.Configuration.buildSettingsInternal(Configuration.java:2259)
       at
org.hibernate.cfg.Configuration.buildSettings(Configuration.java:2255)
       at
org.hibernate.cfg.Configuration.buildSessionFactory(Configuration.java:1724)
       at
org.hibernate.ejb.EntityManagerFactoryImpl.<init>(EntityManagerFactoryImpl.java:76)
       at
org.hibernate.ejb.Ejb3Configuration.buildEntityManagerFactory(Ejb3Configuration.java:907)
       at
org.hibernate.ejb.Ejb3Configuration.buildEntityManagerFactory(Ejb3Configuration.java:887)
       at
org.hibernate.ejb.HibernatePersistence.createEntityManagerFactory(HibernatePersistence.java:56)
       at
javax.persistence.Persistence.createEntityManagerFactory(Persistence.java:63)
       at
javax.persistence.Persistence.createEntityManagerFactory(Persistence.java:47)
       at
com.google.inject.persist.jpa.JpaPersistService.start(JpaPersistService.java:94)
       at
com.google.inject.persist.PersistFilter.init(PersistFilter.java:77)
       at
com.google.inject.servlet.FilterDefinition.init(FilterDefinition.java:114)
       at
com.google.inject.servlet.ManagedFilterPipeline.initPipeline(ManagedFilterPipeline.java:98)
       at com.google.inject.servlet.GuiceFilter.init(GuiceFilter.java:172)
       at
org.mortbay.jetty.servlet.FilterHolder.doStart(FilterHolder.java:97)
       at
org.mortbay.component.AbstractLifeCycle.start(AbstractLifeCycle.java:39)
       at
org.mortbay.jetty.servlet.ServletHandler.initialize(ServletHandler.java:593)
       at org.mortbay.jetty.servlet.Context.startContext(Context.java:140)
       at
org.mortbay.jetty.webapp.WebAppContext.startContext(WebAppContext.java:1220)
       at
org.mortbay.jetty.handler.ContextHandler.doStart(ContextHandler.java:513)
       at
org.mortbay.jetty.webapp.WebAppContext.doStart(WebAppContext.java:448)
       at
com.google.gwt.dev.shell.jetty.JettyLauncher$WebAppContextWithReload.doStart(JettyLauncher.java:468)
       at
org.mortbay.component.AbstractLifeCycle.start(AbstractLifeCycle.java:39)
       at
org.mortbay.jetty.handler.HandlerWrapper.doStart(HandlerWrapper.java:130)
       at
org.mortbay.jetty.handler.RequestLogHandler.doStart(RequestLogHandler.java:115)
       at
org.mortbay.component.AbstractLifeCycle.start(AbstractLifeCycle.java:39)
       at
org.mortbay.jetty.handler.HandlerWrapper.doStart(HandlerWrapper.java:130)
       at org.mortbay.jetty.Server.doStart(Server.java:222)
       at
org.mortbay.component.AbstractLifeCycle.start(AbstractLifeCycle.java:39)
       at
com.google.gwt.dev.shell.jetty.JettyLauncher.start(JettyLauncher.java:672)
       at com.google.gwt.dev.DevMode.doStartUpServer(DevMode.java:509)
       at com.google.gwt.dev.DevModeBase.startUp(DevModeBase.java:1068)
       at com.google.gwt.dev.DevModeBase.run(DevModeBase.java:811)
       at com.google.gwt.dev.DevMode.main(DevMode.java:311)
Caused by: java.lang.ClassCastException: org.hibernate.dialect.MySQLDialect
cannot be cast to org.hibernate.dialect.Dialect
       at
org.hibernate.service.jdbc.dialect.internal.DialectFactoryImpl.constructDialect(DialectFactoryImpl.java:73)
       at
org.hibernate.service.jdbc.dialect.internal.DialectFactoryImpl.buildDialect(DialectFactoryImpl.java:64)
       at
org.hibernate.engine.jdbc.internal.JdbcServicesImpl.configure(JdbcServicesImpl.java:142)
       at
org.hibernate.service.internal.StandardServiceRegistryImpl.configureService(StandardServiceRegistryImpl.java:81)
       at
org.hibernate.service.internal.AbstractServiceRegistryImpl.initializeService(AbstractServiceRegistryImpl.java:160)
       at
org.hibernate.service.internal.AbstractServiceRegistryImpl.getService(AbstractServiceRegistryImpl.java:133)
       at
org.hibernate.cfg.SettingsFactory.buildSettings(SettingsFactory.java:71)
       at
org.hibernate.cfg.Configuration.buildSettingsInternal(Configuration.java:2259)
       at
org.hibernate.cfg.Configuration.buildSettings(Configuration.java:2255)
       at
org.hibernate.cfg.Configuration.buildSessionFactory(Configuration.java:1724)
       at
org.hibernate.ejb.EntityManagerFactoryImpl.<init>(EntityManagerFactoryImpl.java:76)
       at
org.hibernate.ejb.Ejb3Configuration.buildEntityManagerFactory(Ejb3Configuration.java:907)
       at
org.hibernate.ejb.Ejb3Configuration.buildEntityManagerFactory(Ejb3Configuration.java:887)
       at
org.hibernate.ejb.HibernatePersistence.createEntityManagerFactory(HibernatePersistence.java:56)
       at
javax.persistence.Persistence.createEntityManagerFactory(Persistence.java:63)
       at
javax.persistence.Persistence.createEntityManagerFactory(Persistence.java:47)
       at
com.google.inject.persist.jpa.JpaPersistService.start(JpaPersistService.java:94)
       at
com.google.inject.persist.PersistFilter.init(PersistFilter.java:77)
       at
com.google.inject.servlet.FilterDefinition.init(FilterDefinition.java:114)
       at
com.google.inject.servlet.ManagedFilterPipeline.initPipeline(ManagedFilterPipeline.java:98)
       at com.google.inject.servlet.GuiceFilter.init(GuiceFilter.java:172)
       at
org.mortbay.jetty.servlet.FilterHolder.doStart(FilterHolder.java:97)
       at
org.mortbay.component.AbstractLifeCycle.start(AbstractLifeCycle.java:39)
       at
org.mortbay.jetty.servlet.ServletHandler.initialize(ServletHandler.java:593)
       at org.mortbay.jetty.servlet.Context.startContext(Context.java:140)
       at
org.mortbay.jetty.webapp.WebAppContext.startContext(WebAppContext.java:1220)
       at
org.mortbay.jetty.handler.ContextHandler.doStart(ContextHandler.java:513)
       at
org.mortbay.jetty.webapp.WebAppContext.doStart(WebAppContext.java:448)
       at
com.google.gwt.dev.shell.jetty.JettyLauncher$WebAppContextWithReload.doStart(JettyLauncher.java:468)
       at
org.mortbay.component.AbstractLifeCycle.start(AbstractLifeCycle.java:39)
       at
org.mortbay.jetty.handler.HandlerWrapper.doStart(HandlerWrapper.java:130)
       at
org.mortbay.jetty.handler.RequestLogHandler.doStart(RequestLogHandler.java:115)
       at
org.mortbay.component.AbstractLifeCycle.start(AbstractLifeCycle.java:39)
       at
org.mortbay.jetty.handler.HandlerWrapper.doStart(HandlerWrapper.java:130)
       at org.mortbay.jetty.Server.doStart(Server.java:222)
       at
org.mortbay.component.AbstractLifeCycle.start(AbstractLifeCycle.java:39)
       at
com.google.gwt.dev.shell.jetty.JettyLauncher.start(JettyLauncher.java:672)
       at com.google.gwt.dev.DevMode.doStartUpServer(DevMode.java:509)
       at com.google.gwt.dev.DevModeBase.startUp(DevModeBase.java:1068)
       at com.google.gwt.dev.DevModeBase.run(DevModeBase.java:811)
       at com.google.gwt.dev.DevMode.main(DevMode.java:311)



Best regards,

Alexander