was数据源出错的问题

软件名称：
websphere 6.1

软件版本：


环境平台：
sun 490

问题描述：
最近我们的was6.1上的应用程序经常报错，我们使用的是在was里面配置的jndi数据源，以前使用的都很正常，最近老是出现应用获取数据源连接报错的问题，应用启动的时候老是出现500的异常，后来发现只要把应用的上下文改为其他的东西然后重新启动整个服务器（不是was的server）后，然后把应用的上下文改回原来的内容，然后再重启就可以正常应用了。下面是具体的异常信息。麻烦您有空帮我们看下。
[10-9-9 17:09:57:805 CST] 00000065 SystemErr     R javax.naming.NoInitialContextException: Cannot instantiate class: org.ow2.carol.jndi.spi.MultiOrbInitialContextFactory [Root exception is java.lang.ClassNotFoundException: org.ow2.carol.jndi.spi.MultiOrbInitialContextFactory]
at javax.naming.spi.NamingManager.getInitialContext(NamingManager.java:657)
at javax.naming.InitialContext.getDefaultInitCtx(InitialContext.java:247)
at javax.naming.InitialContext.init(InitialContext.java:223)
at javax.naming.InitialContext.(InitialContext.java:175)
at com.boco.restar.common.util.ConnectionPoolFactory.init(ConnectionPoolFactory.java:41)
at com.ibm.ws.webcontainer.servlet.ServletWrapper.init(ServletWrapper.java:199)
at com.ibm.ws.wswebcontainer.servlet.ServletWrapper.init(ServletWrapper.java:319)
at com.ibm.ws.webcontainer.servlet.ServletWrapper.initialize(ServletWrapper.java:1230)
at com.ibm.ws.wswebcontainer.servlet.ServletWrapper.initialize(ServletWrapper.java:152)
at com.ibm.wsspi.webcontainer.extension.WebExtensionProcessor.createServletWrapper(WebExtensionProcessor.java:99)
at com.ibm.ws.webcontainer.webapp.WebApp.initializeTargetMappings(WebApp.java:549)
at com.ibm.ws.webcontainer.webapp.WebApp.commonInitializationFinish(WebApp.java:328)
at com.ibm.ws.wswebcontainer.webapp.WebApp.initialize(WebApp.java:290)
at com.ibm.ws.wswebcontainer.webapp.WebGroup.addWebApplication(WebGroup.java:90)
at com.ibm.ws.wswebcontainer.VirtualHost.addWebApplication(VirtualHost.java:157)
at com.ibm.ws.wswebcontainer.WebContainer.addWebApp(WebContainer.java:665)
at com.ibm.ws.wswebcontainer.WebContainer.addWebApplication(WebContainer.java:618)
at com.ibm.ws.webcontainer.component.WebContainerImpl.install(WebContainerImpl.java:335)
at com.ibm.ws.webcontainer.component.WebContainerImpl.start(WebContainerImpl.java:551)
at com.ibm.ws.runtime.component.ApplicationMgrImpl.start(ApplicationMgrImpl.java:1303)
at com.ibm.ws.runtime.component.DeployedApplicationImpl.fireDeployedObjectStart(DeployedApplicationImpl.java:1138)
at com.ibm.ws.runtime.component.DeployedModuleImpl.start(DeployedModuleImpl.java:569)
at com.ibm.ws.runtime.component.DeployedApplicationImpl.start(DeployedApplicationImpl.java:817)
at com.ibm.ws.runtime.component.ApplicationMgrImpl.startApplication(ApplicationMgrImpl.java:949)
at com.ibm.ws.runtime.component.ApplicationMgrImpl$1.run(ApplicationMgrImpl.java:1486)
at com.ibm.ws.security.auth.ContextManagerImpl.runAs(ContextManagerImpl.java:4042)
at com.ibm.ws.security.auth.ContextManagerImpl.runAsSystem(ContextManagerImpl.java:4139)
at com.ibm.ws.security.core.SecurityContext.runAsSystem(SecurityContext.java:245)
at com.ibm.ws.runtime.component.ApplicationMgrImpl.startApplication(ApplicationMgrImpl.java:1491)
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:585)
at sun.reflect.misc.Trampoline.invoke(MethodUtil.java:36)
at sun.reflect.GeneratedMethodAccessor319.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:585)
at sun.reflect.misc.MethodUtil.invoke(MethodUtil.java:243)
at javax.management.modelmbean.RequiredModelMBean.invokeMethod(RequiredModelMBean.java:1073)
at javax.management.modelmbean.RequiredModelMBean.invoke(RequiredModelMBean.java:954)
at com.sun.jmx.mbeanserver.DynamicMetaDataImpl.invoke(DynamicMetaDataImpl.java:213)
at com.sun.jmx.mbeanserver.MetaDataImpl.invoke(MetaDataImpl.java:220)
at com.sun.jmx.interceptor.DefaultMBeanServerInterceptor.invoke(DefaultMBeanServerInterceptor.java:815)
at com.sun.jmx.mbeanserver.JmxMBeanServer.invoke(JmxMBeanServer.java:784)
at com.ibm.ws.management.AdminServiceImpl$1.run(AdminServiceImpl.java:1081)
at com.ibm.ws.security.util.AccessController.doPrivileged(AccessController.java:118)
at com.ibm.ws.management.AdminServiceImpl.invoke(AdminServiceImpl.java:974)
at com.ibm.ws.management.commands.AdminServiceCommands$InvokeCmd.execute(AdminServiceCommands.java:251)
at com.ibm.ws.console.core.mbean.MBeanHelper.invoke(MBeanHelper.java:239)
at com.ibm.ws.console.appdeployment.ApplicationDeploymentCollectionAction.execute(ApplicationDeploymentCollectionAction.java:537)
at org.apache.struts.action.RequestProcessor.processActionPerform(RequestProcessor.java:484)
at org.apache.struts.action.RequestProcessor.process(RequestProcessor.java:274)
at org.apache.struts.action.ActionServlet.process(ActionServlet.java:1486)
at org.apache.struts.action.ActionServlet.doPost(ActionServlet.java:528)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:763)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:856)
at com.ibm.ws.webcontainer.servlet.ServletWrapper.service(ServletWrapper.java:1075)
at com.ibm.ws.webcontainer.servlet.ServletWrapper.service(ServletWrapper.java:1016)
at com.ibm.ws.webcontainer.filter.WebAppFilterChain.doFilter(WebAppFilterChain.java:118)
at com.ibm.ws.webcontainer.filter.WebAppFilterChain._doFilter(WebAppFilterChain.java:87)
at com.ibm.ws.webcontainer.filter.WebAppFilterManager.doFilter(WebAppFilterManager.java:771)
at com.ibm.ws.webcontainer.filter.WebAppFilterManager.doFilter(WebAppFilterManager.java:679)
at com.ibm.ws.webcontainer.servlet.ServletWrapper.handleRequest(ServletWrapper.java:546)
at com.ibm.ws.wswebcontainer.servlet.ServletWrapper.handleRequest(ServletWrapper.java:478)
at com.ibm.ws.webcontainer.webapp.WebAppRequestDispatcher.forward(WebAppRequestDispatcher.java:321)
at org.apache.struts.action.RequestProcessor.doForward(RequestProcessor.java:1070)
at org.apache.struts.tiles.TilesRequestProcessor.doForward(TilesRequestProcessor.java:273)
at org.apache.struts.action.RequestProcessor.processForwardConfig(RequestProcessor.java:455)
at org.apache.struts.tiles.TilesRequestProcessor.processForwardConfig(TilesRequestProcessor.java:319)
at com.ibm.isclite.container.controller.InformationController.processForwardConfig(InformationController.java:206)
at org.apache.struts.action.RequestProcessor.process(RequestProcessor.java:279)
at org.apache.struts.action.ActionServlet.process(ActionServlet.java:1486)
at org.apache.struts.action.ActionServlet.doPost(ActionServlet.java:528)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:763)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:856)
at com.ibm.ws.webcontainer.servlet.ServletWrapper.service(ServletWrapper.java:1075)
at com.ibm.ws.webcontainer.servlet.ServletWrapper.service(ServletWrapper.java:1016)
at com.ibm.ws.webcontainer.filter.WebAppFilterChain.doFilter(WebAppFilterChain.java:145)
at com.ibm.ws.console.core.servlet.WSCUrlFilter.setUpCommandAssistence(WSCUrlFilter.java:792)
at com.ibm.ws.console.core.servlet.WSCUrlFilter.continueStoringTaskState(WSCUrlFilter.java:363)
at com.ibm.ws.console.core.servlet.WSCUrlFilter.doFilter(WSCUrlFilter.java:229)
at com.ibm.ws.webcontainer.filter.FilterInstanceWrapper.doFilter(FilterInstanceWrapper.java:190)
at com.ibm.ws.webcontainer.filter.WebAppFilterChain.doFilter(WebAppFilterChain.java:130)
at com.ibm.ws.webcontainer.filter.WebAppFilterChain._doFilter(WebAppFilterChain.java:87)
at com.ibm.ws.webcontainer.filter.WebAppFilterManager.doFilter(WebAppFilterManager.java:771)
at com.ibm.ws.webcontainer.filter.WebAppFilterManager.doFilter(WebAppFilterManager.java:679)
at com.ibm.ws.webcontainer.servlet.ServletWrapper.handleRequest(ServletWrapper.java:546)
at com.ibm.ws.wswebcontainer.servlet.ServletWrapper.handleRequest(ServletWrapper.java:478)
at com.ibm.ws.webcontainer.webapp.WebApp.handleRequest(WebApp.java:3391)
at com.ibm.ws.webcontainer.webapp.WebGroup.handleRequest(WebGroup.java:267)
at com.ibm.ws.webcontainer.WebContainer.handleRequest(WebContainer.java:811)
at com.ibm.ws.wswebcontainer.WebContainer.handleRequest(WebContainer.java:1455)
at com.ibm.ws.webcontainer.channel.WCChannelLink.ready(WCChannelLink.java:115)
at com.ibm.ws.http.channel.inbound.impl.HttpInboundLink.handleDiscrimination(HttpInboundLink.java:458)
at com.ibm.ws.http.channel.inbound.impl.HttpInboundLink.handleNewInformation(HttpInboundLink.java:387)
at com.ibm.ws.http.channel.inbound.impl.HttpICLReadCallback.complete(HttpICLReadCallback.java:102)
at com.ibm.ws.tcp.channel.impl.AioReadCompletionListener.futureCompleted(AioReadCompletionListener.java:165)
at com.ibm.io.async.AbstractAsyncFuture.invokeCallback(AbstractAsyncFuture.java:217)
at com.ibm.io.async.AsyncChannelFuture.fireCompletionActions(AsyncChannelFuture.java:161)
at com.ibm.io.async.AsyncFuture.completed(AsyncFuture.java:136)
at com.ibm.io.async.ResultHandler.complete(ResultHandler.java:195)
at com.ibm.io.async.ResultHandler.runEventProcessingLoop(ResultHandler.java:743)
at com.ibm.io.async.ResultHandler$2.run(ResultHandler.java:873)
at com.ibm.ws.util.ThreadPool$Worker.run(ThreadPool.java:1473)
Caused by: java.lang.ClassNotFoundException: org.ow2.carol.jndi.spi.MultiOrbInitialContextFactory
at com.ibm.ws.classloader.CompoundClassLoader.findClass(CompoundClassLoader.java:479)
at com.ibm.ws.classloader.CompoundClassLoader.loadClass(CompoundClassLoader.java:380)
at java.lang.ClassLoader.loadClass(ClassLoader.java:251)
at java.lang.ClassLoader.loadClassInternal(ClassLoader.java:319)
at java.lang.Class.forName0(Native Method)
at java.lang.Class.forName(Class.java:242)
at com.sun.naming.internal.VersionHelper12.loadClass(VersionHelper12.java:42)
at javax.naming.spi.NamingManager.getInitialContext(NamingManager.java:654)
... 103 more

发现出现这种的情况比较多的时候是使用was的控制台发布新的应用和更新应用的内容。