tomcat - Websphere JNDI 查找失败

Question

当我为 jdbc 数据源查找 JNDI 连接时出现以下错误:

javax.naming.ConfigurationException:无法完成对“java:”名称的 JNDI 操作，因为服务器运行时无法将该操作的线程与任何 J2EE 应用程序组件相关联。当使用“java:”名称的 JNDI 客户端未在服务器应用程序请求的线程上执行时，就会出现这种情况。确保 J2EE 应用程序不会对静态代码块中或由该 J2EE 应用程序创建的线程中的“java:”名称执行 JNDI 操作。此类代码不一定在服务器应用程序请求的线程上运行，因此不受 JNDI 操作对“java:”名称的支持。 [根异常是 javax.naming.NameNotFoundException:在上下文“java:”中找不到名称。]

我的查找代码在一个静态方法中。这就是这个错误的原因。我没有创建任何线程

在tomcat中运行没有任何问题

谢谢你的帮助

我使用的代码如下:

  javax.naming.InitialContext ctx = new javax.naming.InitialContext();
  Context cxt = (Context) ctx.lookup("java:/comp/env/");

堆栈跟踪:

C1APP522   2    2013-07-01 21:57:18,332 ERROR DBUtil get EnvContext failed
javax.naming.ConfigurationException: A JNDI operation on a "java:" name cannot be completed because the server runtime is not able to associate the operation's thread with any J2EE application component.  This condition can occur when the JNDI client using the "java:" name is not executed on the thread of a server application request.  Make sure that a J2EE application does not execute JNDI operations on "java:" names within static code blocks or in threads created by that J2EE application.  Such code does not necessarily run on the thread of a server application request and therefore is not supported by JNDI operations on "java:" names. [Root exception is javax.naming.NameNotFoundException: Name  not found in context "java:".]
    at com.ibm.ws.naming.java.javaURLContextImpl.throwConfigurationExceptionWithDefaultJavaNS(javaURLContextImpl.java:428)
    at com.ibm.ws.naming.java.javaURLContextImpl.lookup(javaURLContextImpl.java:399)
    at com.ibm.ws.naming.java.javaURLContextRoot.lookup(javaURLContextRoot.java:220)
    at com.ibm.ws.naming.java.javaURLContextRoot.lookup(javaURLContextRoot.java:160)
    at javax.naming.InitialContext.lookup(InitialContext.java:436)
    at com.test.integration.database.DBUtil_Ext.getEnvContext(DBUtil_Ext.java:121)
    at com.test.integration.database.DBUtil_Ext.getDataSource(DBUtil_Ext.java:102)
    at com.test.integration.database.DBUtil_Ext.getConnection(DBUtil_Ext.java:70)
    at com.test.integration.IntegrationTransportPlugin_Ext.send(IntegrationTransportPlugin_Ext.java:107)
    at com.test.integration.IntegrationTransportPlugin_Ext.send(IntegrationTransportPlugin_Ext.gs)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:60)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:37)
    at java.lang.reflect.Method.invoke(Method.java:611)
    at com.test.system.integration.plugins.PluginProxy.invoke(PluginProxy.java:66)
    at $Proxy58.send(Unknown Source)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:60)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:37)
    at java.lang.reflect.Method.invoke(Method.java:611)
    at com.test.system.integration.plugins.PluginCallTraceImpl$PluginCallTraceHandler.invoke(PluginCallTraceImpl.java:61)
    at $Proxy58.send(Unknown Source)
    at com.test.system.integration.messaging.dispatch.MessageWriter$2.run(MessageWriter.java:347)
    at com.test.system.transaction.ScopedUserTransaction.run(ScopedUserTransaction.java:54)
    at com.test.system.transaction.TransactionManagerImpl.execute(TransactionManagerImpl.java:111)
    at com.test.system.integration.messaging.dispatch.AckHelper.executeMessageOperation(AckHelper.java:137)
    at com.test.system.integration.messaging.dispatch.AckHelper.executeMessageOperation(AckHelper.java:121)
    at com.test.system.integration.messaging.dispatch.MessageWriter.executeSendAndAfterSendInTxn(MessageWriter.java:332)
    at com.test.system.integration.messaging.dispatch.MessageWriter.sendNextMessage(MessageWriter.java:272)
    at com.test.system.integration.messaging.dispatch.MessageSenderRunnable.trySendMessage(MessageSenderRunnable.java:52)
    at com.test.system.integration.messaging.dispatch.MessageSenderRunnable.send(MessageSenderRunnable.java:42)
    at com.test.system.integration.messaging.dispatch.MessageSenderRunnable.run(MessageSenderRunnable.java:30)
    at com.test.system.integration.messaging.dispatch.MessageWriter$CatchesExceptionRunnable.run(MessageWriter.java:603)
    at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:452)
    at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:314)
    at java.util.concurrent.FutureTask.run(FutureTask.java:149)
    at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:897)
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:919)
    at java.lang.Thread.run(Thread.java:736)
Caused by: javax.naming.NameNotFoundException: Name  not found in context "java:".
    at com.ibm.ws.naming.ipbase.NameSpace.getParentCtxInternal(NameSpace.java:1837)
    at com.ibm.ws.naming.ipbase.NameSpace.lookupInternal(NameSpace.java:1166)
    at com.ibm.ws.naming.ipbase.NameSpace.lookup(NameSpace.java:1095)
    at com.ibm.ws.naming.urlbase.UrlContextImpl.lookup(UrlContextImpl.java:1233)
    at com.ibm.ws.naming.java.javaURLContextImpl.lookup(javaURLContextImpl.java:395)
    ... 37 more
C1APP522        2013-07-01 21:57:18,332 ERROR Messaging Exception in MessageSenderRunnable
java.lang.RuntimeException: get EnvContext failed
    at com.test.integration.database.DBUtil_Ext.getEnvContext(DBUtil_Ext.java:125)
    at com.test.integration.database.DBUtil_Ext.getDataSource(DBUtil_Ext.java:102)
    at com.test.integration.database.DBUtil_Ext.getConnection(DBUtil_Ext.java:70)
    at com.test.integration.IntegrationTransportPlugin_Ext.send(IntegrationTransportPlugin_Ext.java:107)
    at com.test.integration.IntegrationTransportPlugin_Ext.send(IntegrationTransportPlugin_Ext.java)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:60)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:37)
    at java.lang.reflect.Method.invoke(Method.java:611)
    at com.test.system.integration.plugins.PluginProxy.invoke(PluginProxy.java:66)
    at $Proxy58.send(Unknown Source)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:60)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:37)
    at java.lang.reflect.Method.invoke(Method.java:611)
    at com.test.system.integration.plugins.PluginCallTraceImpl$PluginCallTraceHandler.invoke(PluginCallTraceImpl.java:61)
    at $Proxy58.send(Unknown Source)
    at com.test.system.integration.messaging.dispatch.MessageWriter$2.run(MessageWriter.java:347)
    at com.test.system.transaction.ScopedUserTransaction.run(ScopedUserTransaction.java:54)
    at com.test.system.transaction.TransactionManagerImpl.execute(TransactionManagerImpl.java:111)
    at com.test.system.integration.messaging.dispatch.AckHelper.executeMessageOperation(AckHelper.java:137)
    at com.test.system.integration.messaging.dispatch.AckHelper.executeMessageOperation(AckHelper.java:121)
    at com.test.system.integration.messaging.dispatch.MessageWriter.executeSendAndAfterSendInTxn(MessageWriter.java:332)
    at com.test.system.integration.messaging.dispatch.MessageWriter.sendNextMessage(MessageWriter.java:272)
    at com.test.system.integration.messaging.dispatch.MessageSenderRunnable.trySendMessage(MessageSenderRunnable.java:52)
    at com.test.system.integration.messaging.dispatch.MessageSenderRunnable.send(MessageSenderRunnable.java:42)
    at com.test.system.integration.messaging.dispatch.MessageSenderRunnable.run(MessageSenderRunnable.java:30)
    at com.test.system.integration.messaging.dispatch.MessageWriter$CatchesExceptionRunnable.run(MessageWriter.java:603)
    at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:452)
    at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:314)
    at java.util.concurrent.FutureTask.run(FutureTask.java:149)
    at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:897)
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:919)
    at java.lang.Thread.run(Thread.java:736)

Answer 1

假设您在 WAS 中配置了数据源，您有两个选择:

一个。在部署期间将数据源绑定(bind)到调用组件的命名空间，并使用以“java:comp/env/”开头的名称进行查找。例如，要为整个 Web 应用程序绑定(bind)数据源，您应该将以下内容添加到 web.xml 中:

<resource-ref>
  <res-ref-name>name_used_in_lookup</res-ref-name>
  <jndi-name>data_source_jndi_name</jndi-name>
</resource-ref>

name_used_in_lookup 应该没有 'java:comp/env/' 部分。

不使用 java:comp/env/直接通过 JNDI 名称查找数据源