5
नमस्ते और धन्यवाद की मेजबानी की हमारी समस्या/त्रुटि है:हाइबरनेट ClassCastException</p> <p>;-) देखने के लिए मोड केवल
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
...
(तल पर पूर्ण स्टैक ट्रेस देखें)
यह तब होता है निम्नलिखित प्रौद्योगिकियों का उपयोग कर एक जीडब्ल्यूटी आधारित वेब एप्लिकेशन में:
- मेवेन
- हाइबरनेट EntityManager/जेपीए
- Guice
- GWT
- GWT-पी
- GWT Maven प्लगइन
- ...
तनाव के लिए तथ्य यह है कि यह बिलाव में काम करता है। केवल जीडब्ल्यूटी मेवेन प्लगइन (लक्ष्य gwt: run के साथ) का उपयोग करते हुए विकास मोड उर्फ होस्टेड मोड (जेटी के साथ) में, हमें क्लासकास्ट अपवाद प्राप्त होता है। हम भाग्य के बिना हाइबरनेट निर्भरताओं के साथ खेल रहे थे (hibernate-validator और/या hibernate-jpa-2.0-api जोड़ना)। किसी भी सेवा का वास्तव में उपयोग होने से पहले क्लासकास्ट अपवाद जेपीए के स्टार्टअप पर फेंक दिया जाता है। Btw:
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
...
यह क्यों:
install(new JpaPersistModule("PUname"));
filter("/*").through(PersistFilter.class);
यह उल्लेख है कि बोली सेटिंग (persistence.xml में) को निष्क्रिय भी एक और ClassCastException बनाता जेपीए स्टार्टअप पर लायक हो सकता है: जेपीए Guice का उपयोग कर सेटअप है जेटी में तोड़ना? इसके कारण क्या हो सकता है या इसे कैसे ठीक किया जा सकता है?
फ़ाइल: 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>
webapp में हमारी जार:
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
पूर्ण स्टैकट्रेस:
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)
सादर, अलेक्जेंडर