錯誤javax.naming.NamingException

我新使用j2ee，當我運行這個項目使用netbean 6.9。我得到了這個問題錯誤javax.naming.NamingException

javax.naming.NamingException: Lookup failed for 'java:comp/env' in SerialContext [Root exception is javax.naming.NamingException: Invocation exception: Got null ComponentInvocation ] 
     at com.sun.enterprise.naming.impl.SerialContext.lookup(SerialContext.java:442) 
     at javax.naming.InitialContext.lookup(InitialContext.java:392) 
     at javax.naming.InitialContext.lookup(InitialContext.java:392) 
     at com.askad.ap.util.ListReader.readPath(ListReader.java:34) 
     at com.askad.ap.util.ListReader.<init>(ListReader.java:29) 
     at com.askad.ap.facade.UserTransactionFacade.<init>(UserTransactionFacade.java:44) 
     at com.askad.ap.facade.__EJB31_Generated__UserTransactionFacade__Intf____Bean__.<init>(Unknown Source) 
     at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method) 
     at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:39) 
     at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:27) 
     at java.lang.reflect.Constructor.newInstance(Constructor.java:513) 
     at java.lang.Class.newInstance0(Class.java:355) 
     at java.lang.Class.newInstance(Class.java:308) 
     at com.sun.ejb.containers.BaseContainer.instantiateOptionalEJBLocalBusinessObjectImpl(BaseContainer.java:3801) 
     at com.sun.ejb.containers.StatelessSessionContainer.initializeHome(StatelessSessionContainer.java:248) 
     at com.sun.ejb.containers.ContainerFactoryImpl.createContainer(ContainerFactoryImpl.java:161) 
     at org.glassfish.ejb.startup.EjbApplication.loadContainers(EjbApplication.java:207) 
     at org.glassfish.ejb.startup.EjbDeployer.load(EjbDeployer.java:197) 
     at org.glassfish.ejb.startup.EjbDeployer.load(EjbDeployer.java:63) 
     at org.glassfish.internal.data.ModuleInfo.load(ModuleInfo.java:175) 
     at org.glassfish.internal.data.ApplicationInfo.load(ApplicationInfo.java:216) 
     at com.sun.enterprise.v3.server.ApplicationLifecycle.deploy(ApplicationLifecycle.java:338) 
     at com.sun.enterprise.v3.server.ApplicationLifecycle.deploy(ApplicationLifecycle.java:183) 
     at org.glassfish.deployment.admin.DeployCommand.execute(DeployCommand.java:272) 
     at com.sun.enterprise.v3.admin.CommandRunnerImpl$1.execute(CommandRunnerImpl.java:305) 
     at com.sun.enterprise.v3.admin.CommandRunnerImpl.doCommand(CommandRunnerImpl.java:320) 
     at com.sun.enterprise.v3.admin.CommandRunnerImpl.doCommand(CommandRunnerImpl.java:1176) 
     at com.sun.enterprise.v3.admin.CommandRunnerImpl.access$900(CommandRunnerImpl.java:83) 
     at com.sun.enterprise.v3.admin.CommandRunnerImpl$ExecutionContext.execute(CommandRunnerImpl.java:1235) 
     at com.sun.enterprise.v3.admin.CommandRunnerImpl$ExecutionContext.execute(CommandRunnerImpl.java:1224) 
     at com.sun.enterprise.v3.admin.AdminAdapter.doCommand(AdminAdapter.java:365) 
     at com.sun.enterprise.v3.admin.AdminAdapter.service(AdminAdapter.java:204) 
     at com.sun.grizzly.tcp.http11.GrizzlyAdapter.service(GrizzlyAdapter.java:166) 
     at com.sun.enterprise.v3.server.HK2Dispatcher.dispath(HK2Dispatcher.java:100) 
     at com.sun.enterprise.v3.services.impl.ContainerMapper.service(ContainerMapper.java:245) 
     at com.sun.grizzly.http.ProcessorTask.invokeAdapter(ProcessorTask.java:791) 
     at com.sun.grizzly.http.ProcessorTask.doProcess(ProcessorTask.java:693) 
     at com.sun.grizzly.http.ProcessorTask.process(ProcessorTask.java:954) 
     at com.sun.grizzly.http.DefaultProtocolFilter.execute(DefaultProtocolFilter.java:170) 
     at com.sun.grizzly.DefaultProtocolChain.executeProtocolFilter(DefaultProtocolChain.java:135) 
     at com.sun.grizzly.DefaultProtocolChain.execute(DefaultProtocolChain.java:102) 
     at com.sun.grizzly.DefaultProtocolChain.execute(DefaultProtocolChain.java:88) 
     at com.sun.grizzly.http.HttpProtocolChain.execute(HttpProtocolChain.java:76) 
     at com.sun.grizzly.ProtocolChainContextTask.doCall(ProtocolChainContextTask.java:53) 
     at com.sun.grizzly.SelectionKeyContextTask.call(SelectionKeyContextTask.java:57) 
     at com.sun.grizzly.ContextTask.run(ContextTask.java:69) 
     at com.sun.grizzly.util.AbstractThreadPool$Worker.doWork(AbstractThreadPool.java:330) 
     at com.sun.grizzly.util.AbstractThreadPool$Worker.run(AbstractThreadPool.java:309) 
     at java.lang.Thread.run(Thread.java:662) 
Caused by: javax.naming.NamingException: Invocation exception: Got null ComponentInvocation 
     at com.sun.enterprise.naming.impl.GlassfishNamingManagerImpl.getComponentId(GlassfishNamingManagerImpl.java:773) 
     at com.sun.enterprise.naming.impl.GlassfishNamingManagerImpl.lookup(GlassfishNamingManagerImpl.java:655) 
     at com.sun.enterprise.naming.impl.JavaURLContext.lookup(JavaURLContext.java:156) 
     at com.sun.enterprise.naming.impl.SerialContext.lookup(SerialContext.java:428) 
     ... 48 more

當我點擊

com.askad.ap.util.ListReader.readPath(ListReader.java:34)

NetBean給予亮點，這條線

Context env = (Context) new InitialContext().lookup("java:comp/env");

任何人都知道如何解決這個問題呢？什麼原因這個問題？ Thx b4

來源

2011-03-09 BoloBolo

*爲什麼*你在查找上下文嗎？你是否試圖列出它？它通常不支持list（）。 – EJP 2014-01-27 21:59:14

從堆棧跟蹤中，它看起來像是使用Glassfish作爲容器。在context.xml中，您應該定義一個或多個資源。假設您有一個名爲jdbc/msql的程序。然後你可以使用java：comp/env/jdbc/msql來引用它。它看起來像是指那些可疑的代碼行中的一些空資源。心連心。

來源

2011-04-05 19:42:25

我已經看到這個異常，當試圖從它不可訪問的線程訪問java：comp/env命名空間時。我使用全局標識符（例如，「jdbc/msql」而不是「java：comp/env/jdbc/msql」）解決了這個問題。

您也可以在可能的地方獲取對象（例如，通過@Resource注入），然後從任何線程中引用它。

來源

2012-05-15 21:48:22 David

如果您在glassfish中發生此錯誤，請嘗試查找文件sun-web.xml。如果這個文件丟失，可能會發生這種情況。

來源

2013-02-20 13:37:31 user2091414

錯誤javax.naming.NamingException

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