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我在這個問題，因爲很長一段時間，我真的不明白問題來了，也許你可以幫助我。異常null當試圖設置值jms /主題
我正在使用JMS主題爲異步消息創建J2EE Web應用程序。問題是，與在InitialContext的查詢檢索我的主題時，我的話題總是被設置爲null，並且此異常被拋出：
ATTENTION: RAR7096: Exception null while trying to set the value jms/Topic on property Name
GRAVE: enterprise_naming.serialctx_communication_exception
GRAVE: com.sun.appserv.connectors.internal.api.PoolingException
at com.sun.enterprise.resource.beans.AdministeredObjectResource.createAdministeredObject(AdministeredObjectResource.java:199)
at com.sun.enterprise.resource.naming.AdministeredObjectFactory.getObjectInstance(AdministeredObjectFactory.java:128)
at javax.naming.spi.NamingManager.getObjectInstance(NamingManager.java:304)
at com.sun.enterprise.naming.impl.SerialContext.getObjectInstance(SerialContext.java:472)
at com.sun.enterprise.naming.impl.SerialContext.lookup(SerialContext.java:437)
at javax.naming.InitialContext.lookup(InitialContext.java:392)
at javax.naming.InitialContext.lookup(InitialContext.java:392)
at org.apache.jsp.index_jsp.jspInit(index_jsp.java from :36)
at org.apache.jasper.runtime.HttpJspBase.init(HttpJspBase.java:90)
at org.apache.jasper.servlet.JspServletWrapper.getServlet(JspServletWrapper.java:208)
at org.apache.jasper.servlet.JspServletWrapper.getDependants(JspServletWrapper.java:317)
at org.apache.jasper.compiler.Compiler.isOutDated(Compiler.java:615)
at org.apache.jasper.compiler.Compiler.isOutDated(Compiler.java:483)
at org.apache.jasper.JspCompilationContext.compile(JspCompilationContext.java:618)
at org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:377)
at org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:483)
at org.apache.jasper.servlet.JspServlet.service(JspServlet.java:373)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:847)
at org.apache.catalina.core.StandardWrapper.service(StandardWrapper.java:1523)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:279)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:188)
at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:641)
at com.sun.enterprise.web.WebPipeline.invoke(WebPipeline.java:97)
at com.sun.enterprise.web.PESessionLockingStandardPipeline.invoke(PESessionLockingStandardPipeline.java:85)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:185)
at org.apache.catalina.connector.CoyoteAdapter.doService(CoyoteAdapter.java:325)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:226)
at com.sun.enterprise.v3.services.impl.ContainerMapper.service(ContainerMapper.java:165)
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:680)
Caused by: java.security.PrivilegedActionException: com.sun.appserv.connectors.internal.api.ConnectorRuntimeException
at java.security.AccessController.doPrivileged(Native Method)
at com.sun.enterprise.resource.beans.AdministeredObjectResource.createAdministeredObject(AdministeredObjectResource.java:176)
... 41 more
Caused by: com.sun.appserv.connectors.internal.api.ConnectorRuntimeException
at com.sun.enterprise.connectors.util.SetMethodAction.handleException(SetMethodAction.java:140)
at com.sun.enterprise.connectors.util.SetMethodAction.run(SetMethodAction.java:126)
... 43 more
Caused by: java.lang.reflect.InvocationTargetException
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:597)
at com.sun.enterprise.connectors.util.SetMethodAction.run(SetMethodAction.java:99)
... 43 more
Caused by: java.lang.IllegalArgumentException: MQ:Topic:Invalid Topic Name - jms/Topic
at com.sun.messaging.Topic.setName(Topic.java:90)
... 48 more
這裏是我的代碼，有問題的行是「主題=（主題） ic.lookup（ 「JMS /話題」）;」
<%!
@Resource(mappedName = "jms/ConnectionFactory")
ConnectionFactory connectionFactory;
@Resource(mappedName = "jms/Topic")
Topic topic;
Connection connection = null;
Session jmsSession = null;
MessageProducer messageProducer = null;
public void jspInit() {
try {
InitialContext ic = new InitialContext();
connectionFactory = (ConnectionFactory) ic.lookup("jms/ConnectionFactory");
topic = (Topic) ic.lookup("jms/Topic");
connection = connectionFactory.createConnection();
jmsSession = connection.createSession(false, Session.AUTO_ACKNOWLEDGE);
messageProducer = jmsSession.createProducer(topic);
connection.start();
} catch (Exception e) {
System.out.println("Couldn't create nsl : " + e.getMessage());
}
}
我希望你能幫我弄清楚這個文件有什麼問題！
謝謝！
編輯：服務器ressources 
嗨，感謝您的意見，我正在關注我的老師之一的幻燈片，它並不完美。首先，我刪除了查找，因爲我有@Resource，但它仍然不起作用。然後，我的工廠和我的主題存在，我追溯到這條線的例外：topic =（Topic）ic.lookup（「jms/Topic」）;所以工廠沒有問題。 – Cyril 2011-05-29 23:11:38
當您注入資源時，您不必再查看它們。它是查找或注入，而不是兩者。 – fvu 2011-05-29 23:16:07
是的，如果我刪除了@Reference，那麼connectionFactory和topic都是空的。如果我刪除查找，可以很好地檢索connectionFactory，但主題變量爲空，並且查找會引發異常... – Cyril 2011-05-29 23:19:56