java - JPA 和 EJB 中的错误

Question

我是 JPA 和 EJB 的新手。分别尝试了 JPA 和 EJB 应用程序，一切顺利。但一起使用时出现错误。

这是我在 eclipse IDE 中将 JPA 与 EJB 3(JBoss 7 AS 服务器)一起使用时遇到的错误(日志)。

谁能帮我解决这个问题吗？

 11:43:43,735 INFO  [org.jboss.as.jpa] (MSC service thread 1-14) JBAS011402: Starting Persistence Unit Service 'SampleEAR.ear#Student'
    11:43:43,781 ERROR [org.jboss.msc.service.fail] (MSC service thread 1-7) MSC00001: Failed to start service jboss.deployment.subunit."SampleEAR.ear"."SampleEJB.jar".INSTALL: org.jboss.msc.service.StartException in service jboss.deployment.subunit."SampleEAR.ear"."SampleEJB.jar".INSTALL: Failed to process phase INSTALL of subdeployment "SampleEJB.jar" of deployment "SampleEAR.ear"
        at org.jboss.as.server.deployment.DeploymentUnitPhaseService.start(DeploymentUnitPhaseService.java:119) [jboss-as-server-7.1.1.Final.jar:7.1.1.Final]
        at org.jboss.msc.service.ServiceControllerImpl$StartTask.startService(ServiceControllerImpl.java:1811) [jboss-msc-1.0.2.GA.jar:1.0.2.GA]
        at org.jboss.msc.service.ServiceControllerImpl$StartTask.run(ServiceControllerImpl.java:1746) [jboss-msc-1.0.2.GA.jar:1.0.2.GA]
        at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source) [rt.jar:1.7.0_09]
        at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source) [rt.jar:1.7.0_09]
        at java.lang.Thread.run(Unknown Source) [rt.jar:1.7.0_09]
    Caused by: org.jboss.as.server.deployment.DeploymentUnitProcessingException: JBAS011047: Component class ejb.MyBean for component MyBean has errors: 
    JBAS011428: Cannot inject RESOURCE_LOCAL container managed EntityManagers using @PersistenceContext
        at org.jboss.as.ee.component.deployers.ModuleJndiBindingProcessor$1.handle(ModuleJndiBindingProcessor.java:169)
        at org.jboss.as.ee.component.ClassDescriptionTraversal.run(ClassDescriptionTraversal.java:54)
        at org.jboss.as.ee.component.deployers.ModuleJndiBindingProcessor.processClassConfigurations(ModuleJndiBindingProcessor.java:162)
        at org.jboss.as.ee.component.deployers.ModuleJndiBindingProcessor.deploy(ModuleJndiBindingProcessor.java:155)
        at org.jboss.as.server.deployment.DeploymentUnitPhaseService.start(DeploymentUnitPhaseService.java:113) [jboss-as-server-7.1.1.Final.jar:7.1.1.Final]
        ... 5 more

    11:43:43,816 INFO  [org.hibernate.annotations.common.Version] (MSC service thread 1-14) HCANN000001: Hibernate Commons Annotations {4.0.1.Final}
    11:43:43,820 INFO  [org.hibernate.Version] (MSC service thread 1-14) HHH000412: Hibernate Core {4.0.1.Final}
    11:43:43,821 INFO  [org.hibernate.cfg.Environment] (MSC service thread 1-14) HHH000206: hibernate.properties not found
    11:43:43,822 INFO  [org.hibernate.cfg.Environment] (MSC service thread 1-14) HHH000021: Bytecode provider name : javassist
    11:43:43,835 INFO  [org.hibernate.ejb.Ejb3Configuration] (MSC service thread 1-14) HHH000204: Processing PersistenceUnitInfo [
        name: Student
        ...]
    11:43:43,837 INFO  [org.jboss.web] (MSC service thread 1-13) JBAS018210: Registering web context: /SampleWAR
    11:43:43,924 INFO  [org.hibernate.service.jdbc.connections.internal.DriverManagerConnectionProviderImpl] (MSC service thread 1-14) HHH000402: Using Hibernate built-in connection pool (not for production use!)
    11:43:43,925 ERROR [org.jboss.msc.service.fail] (MSC service thread 1-14) MSC00001: Failed to start service jboss.persistenceunit."SampleEAR.ear#Student": org.jboss.msc.service.StartException in service jboss.persistenceunit."SampleEAR.ear#Student": Failed to start service
        at org.jboss.msc.service.ServiceControllerImpl$StartTask.run(ServiceControllerImpl.java:1767) [jboss-msc-1.0.2.GA.jar:1.0.2.GA]
        at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source) [rt.jar:1.7.0_09]
        at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source) [rt.jar:1.7.0_09]
        at java.lang.Thread.run(Unknown Source) [rt.jar:1.7.0_09]
    Caused by: javax.persistence.PersistenceException: [PersistenceUnit: Student] Unable to build EntityManagerFactory
        at org.hibernate.ejb.Ejb3Configuration.buildEntityManagerFactory(Ejb3Configuration.java:914)
        at org.hibernate.ejb.Ejb3Configuration.buildEntityManagerFactory(Ejb3Configuration.java:889)
        at org.hibernate.ejb.HibernatePersistence.createContainerEntityManagerFactory(HibernatePersistence.java:73)
        at org.jboss.as.jpa.service.PersistenceUnitServiceImpl.createContainerEntityManagerFactory(PersistenceUnitServiceImpl.java:162)
        at org.jboss.as.jpa.service.PersistenceUnitServiceImpl.start(PersistenceUnitServiceImpl.java:85)
        at org.jboss.msc.service.ServiceControllerImpl$StartTask.startService(ServiceControllerImpl.java:1811) [jboss-msc-1.0.2.GA.jar:1.0.2.GA]
        at org.jboss.msc.service.ServiceControllerImpl$StartTask.run(ServiceControllerImpl.java:1746) [jboss-msc-1.0.2.GA.jar:1.0.2.GA]
        ... 3 more
    Caused by: org.hibernate.HibernateException: Specified JDBC Driver com.microsoft.sqlserver.jdbc.SQLServerDriver class not found
        at org.hibernate.service.jdbc.connections.internal.DriverManagerConnectionProviderImpl.configure(DriverManagerConnectionProviderImpl.java:104)
        at org.hibernate.service.internal.StandardServiceRegistryImpl.configureService(StandardServiceRegistryImpl.java:75)
        at org.hibernate.service.internal.AbstractServiceRegistryImpl.initializeService(AbstractServiceRegistryImpl.java:159)
        at org.hibernate.service.internal.AbstractServiceRegistryImpl.getService(AbstractServiceRegistryImpl.java:131)
        at org.hibernate.engine.jdbc.internal.JdbcServicesImpl.buildJdbcConnectionAccess(JdbcServicesImpl.java:234)
        at org.hibernate.engine.jdbc.internal.JdbcServicesImpl.configure(JdbcServicesImpl.java:91)
        at org.hibernate.service.internal.StandardServiceRegistryImpl.configureService(StandardServiceRegistryImpl.java:75)
        at org.hibernate.service.internal.AbstractServiceRegistryImpl.initializeService(AbstractServiceRegistryImpl.java:159)
        at org.hibernate.service.internal.AbstractServiceRegistryImpl.getService(AbstractServiceRegistryImpl.java:131)
        at org.hibernate.cfg.SettingsFactory.buildSettings(SettingsFactory.java:71)
        at org.hibernate.cfg.Configuration.buildSettingsInternal(Configuration.java:2270)
        at org.hibernate.cfg.Configuration.buildSettings(Configuration.java:2266)
        at org.hibernate.cfg.Configuration.buildSessionFactory(Configuration.java:1735)
        at org.hibernate.ejb.EntityManagerFactoryImpl.<init>(EntityManagerFactoryImpl.java:84)
        at org.hibernate.ejb.Ejb3Configuration.buildEntityManagerFactory(Ejb3Configuration.java:904)
        ... 9 more
    Caused by: java.lang.ClassNotFoundException: com.microsoft.sqlserver.jdbc.SQLServerDriver from [Module "org.hibernate:main" from local module loader @16e3ecd (roots: C:\jboss-as-7.1.1.Final\modules)]
        at org.jboss.modules.ModuleClassLoader.findClass(ModuleClassLoader.java:190) [jboss-modules.jar:1.1.1.GA]
        at org.jboss.modules.ConcurrentClassLoader.performLoadClassUnchecked(ConcurrentClassLoader.java:468) [jboss-modules.jar:1.1.1.GA]
        at org.jboss.modules.ConcurrentClassLoader.performLoadClassChecked(ConcurrentClassLoader.java:456) [jboss-modules.jar:1.1.1.GA]
        at org.jboss.modules.ConcurrentClassLoader.performLoadClass(ConcurrentClassLoader.java:398) [jboss-modules.jar:1.1.1.GA]
        at org.jboss.modules.ConcurrentClassLoader.loadClass(ConcurrentClassLoader.java:120) [jboss-modules.jar:1.1.1.GA]
        at java.lang.Class.forName0(Native Method) [rt.jar:1.7.0_09]
        at java.lang.Class.forName(Unknown Source) [rt.jar:1.7.0_09]
        at org.hibernate.internal.util.ReflectHelper.classForName(ReflectHelper.java:192)
        at org.hibernate.service.jdbc.connections.internal.DriverManagerConnectionProviderImpl.configure(DriverManagerConnectionProviderImpl.java:101)
        ... 23 more

    11:43:44,141 INFO  [org.jboss.as.server] (DeploymentScanner-threads - 2) JBAS015870: Deploy of deployment "SampleEAR.ear" was rolled back with failure message {"JBAS014671: Failed services" => {"jboss.deployment.subunit.\"SampleEAR.ear\".\"SampleEJB.jar\".INSTALL" => "org.jboss.msc.service.StartException in service jboss.deployment.subunit.\"SampleEAR.ear\".\"SampleEJB.jar\".INSTALL: Failed to process phase INSTALL of subdeployment \"SampleEJB.jar\" of deployment \"SampleEAR.ear\"","jboss.persistenceunit.\"SampleEAR.ear#Student\"" => "org.jboss.msc.service.StartException in service jboss.persistenceunit.\"SampleEAR.ear#Student\": Failed to start service"},"JBAS014771: Services with missing/unavailable dependencies" => ["jboss.naming.context.java.comp.SampleEAR.SampleEJB.MyBean.ValidatorFactoryjboss.naming.context.java.comp.SampleEAR.SampleEJB.MyBeanMissing[jboss.naming.context.java.comp.SampleEAR.SampleEJB.MyBean.ValidatorFactoryjboss.naming.context.java.comp.SampleEAR.SampleEJB.MyBean]","jboss.naming.context.java.comp.SampleEAR.SampleEJB.MyBean.Validatorjboss.naming.context.java.comp.SampleEAR.SampleEJB.MyBeanMissing[jboss.naming.context.java.comp.SampleEAR.SampleEJB.MyBean.Validatorjboss.naming.context.java.comp.SampleEAR.SampleEJB.MyBean]"]}
    11:43:44,166 INFO  [org.hibernate.service.jdbc.connections.internal.DriverManagerConnectionProviderImpl] (Finalizer) HHH000030: Cleaning up connection pool [null]
    11:43:44,168 INFO  [org.jboss.as.server.deployment] (MSC service thread 1-6) JBAS015877: Stopped deployment SampleEJB.jar in 27ms
    11:43:44,168 INFO  [org.jboss.as.server.deployment] (MSC service thread 1-3) JBAS015877: Stopped deployment SampleWAR.war in 27ms
    11:43:44,171 INFO  [org.jboss.as.server.deployment] (MSC service thread 1-3) JBAS015877: Stopped deployment SampleEAR.ear in 31ms
    11:43:44,172 INFO  [org.jboss.as.controller] (DeploymentScanner-threads - 2) JBAS014774: Service status report
    JBAS014775:    New missing/unsatisfied dependencies:
          service jboss.naming.context.java.comp.SampleEAR.SampleEJB.MyBean (missing) dependents: [service jboss.naming.context.java.comp.SampleEAR.SampleEJB.MyBean.ValidatorFactory, service jboss.naming.context.java.comp.SampleEAR.SampleEJB.MyBean.Validator] 
    JBAS014777:   Services which failed to start:      service jboss.deployment.subunit."SampleEAR.ear"."SampleEJB.jar".INSTALL: org.jboss.msc.service.StartException in service jboss.deployment.subunit."SampleEAR.ear"."SampleEJB.jar".INSTALL: Failed to process phase INSTALL of subdeployment "SampleEJB.jar" of deployment "SampleEAR.ear"
          service jboss.persistenceunit."SampleEAR.ear#Student": org.jboss.msc.service.StartException in service jboss.persistenceunit."SampleEAR.ear#Student": Failed to start service

    11:43:44,175 ERROR [org.jboss.as.server.deployment.scanner] (DeploymentScanner-threads - 1) {"JBAS014653: Composite operation failed and was rolled back. Steps that failed:" => {"Operation step-2" => {"JBAS014671: Failed services" => {"jboss.deployment.subunit.\"SampleEAR.ear\".\"SampleEJB.jar\".INSTALL" => "org.jboss.msc.service.StartException in service jboss.deployment.subunit.\"SampleEAR.ear\".\"SampleEJB.jar\".INSTALL: Failed to process phase INSTALL of subdeployment \"SampleEJB.jar\" of deployment \"SampleEAR.ear\"","jboss.persistenceunit.\"SampleEAR.ear#Student\"" => "org.jboss.msc.service.StartException in service jboss.persistenceunit.\"SampleEAR.ear#Student\": Failed to start service"},"JBAS014771: Services with missing/unavailable dependencies" => ["jboss.naming.context.java.comp.SampleEAR.SampleEJB.MyBean.ValidatorFactoryjboss.naming.context.java.comp.SampleEAR.SampleEJB.MyBeanMissing[jboss.naming.context.java.comp.SampleEAR.SampleEJB.MyBean.ValidatorFactoryjboss.naming.context.java.comp.SampleEAR.SampleEJB.MyBean]","jboss.naming.context.java.comp.SampleEAR.SampleEJB.MyBean.Validatorjboss.naming.context.java.comp.SampleEAR.SampleEJB.MyBeanMissing[jboss.naming.context.java.comp.SampleEAR.SampleEJB.MyBean.Validatorjboss.naming.context.java.comp.SampleEAR.SampleEJB.MyBean]"]}}}

Answer 1

根据堆栈跟踪判断您正在使用 MS SQL 服务器。

由以下原因引起:java.lang.ClassNotFoundException:com.microsoft.sqlserver.jdbc.SQLServerDriver 来自本地模块加载器@16e3ecd 中的[模块“org.hibernate:main”(根:C:\jboss-as-) 7.1.1.Final\modules)]

此行表明 MS SQL Server 的 JDBC 驱动程序不在您的类路径中。或者与 SampleEAR.ear 文件一起打包。

我建议您通过您使用的任何 IDE 将其添加到项目的构建路径中，以便将其打包在 .ear 文件中。

编辑:

在这种情况下，在您的配置 xml 中将驱动程序类更改为 com.microsoft.jdbc.sqlserver.SQLServerDriver 您添加的类适用于 MS SQL Server 2005。但该驱动程序可能不适用于那个。