Question : WSVR0501E Error creating component null

WebSphere Platform 6.0 [ND 6.0.2.31 cf310840.03]  
Java version = J2RE 1.4.2
Host Operating System is AIX, version 5.3
we are using websphere 6.0 and we have installed a new JVM. When I try to deploy the war file, its gets installed fine. I do see any expections while the deployment of the application happens.

When I bring up the server i notice that the application fails to start during start up. I notice the following exception

[5/7/09 19:28:49:159 UTC] 0000002b RecoveryManag A   WTRN0028I: Transaction service recovering 0 transactions.
[5/7/09 19:28:49:339 UTC] 0000002d ApplicationMg A   WSVR0200I: Starting application: aahonline
[5/7/09 19:28:49:969 UTC] 0000002d ApplicationMg E   WSVR0101W: An error occurred starting, aahonline

[5/7/09 19:28:50:006 UTC] 0000002d ApplicationMg A   WSVR0217I: Stopping application: aahonline
[5/7/09 19:28:50:117 UTC] 0000002d ApplicationMg A   WSVR0220I: Application stopped: aahonline
[5/7/09 19:28:50:141 UTC] 0000000a ContainerImpl E   WSVR0501E: Error creating component null [class com.ibm.ws.runtime.component.ApplicationMgrImpl]
com.ibm.ws.exception.RuntimeWarning: com.ibm.ws.exception.RuntimeError: java.lang.RuntimeException: java.lang.NullPointerException
      at com.ibm.ws.runtime.component.ApplicationMgrImpl.startApplications(ApplicationMgrImpl.java:797)
      at com.ibm.ws.runtime.component.ApplicationMgrImpl.start(ApplicationMgrImpl.java:544)
      at com.ibm.ws.runtime.component.ContainerImpl.startComponents(ContainerImpl.java:820)
      at com.ibm.ws.runtime.component.ContainerImpl.start(ContainerImpl.java:649)
      at com.ibm.ws.runtime.component.ApplicationServerImpl.start(ApplicationServerImpl.java:149)
      at com.ibm.ws.runtime.component.ContainerImpl.startComponents(ContainerImpl.java:820)
      at com.ibm.ws.runtime.component.ContainerImpl.start(ContainerImpl.java:649)
      at com.ibm.ws.runtime.component.ServerImpl.start(ServerImpl.java:444)
      at com.ibm.ws.runtime.WsServerImpl.bootServerContainer(WsServerImpl.java:187)
      at com.ibm.ws.runtime.WsServerImpl.start(WsServerImpl.java:133)
      at com.ibm.ws.runtime.WsServerImpl.main(WsServerImpl.java:387)
      at com.ibm.ws.runtime.WsServer.main(WsServer.java:53)
      at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
      at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:85)
      at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:58)
      at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:60)
      at java.lang.reflect.Method.invoke(Method.java:391)
      at com.ibm.ws.bootstrap.WSLauncher.run(WSLauncher.java:219)
      at java.lang.Thread.run(Thread.java:571)
Caused by: com.ibm.ws.exception.RuntimeError: java.lang.RuntimeException: java.lang.NullPointerException
      at com.ibm.ws.runtime.component.ApplicationMgrImpl.startApplication(ApplicationMgrImpl.java:944)
      at com.ibm.ws.runtime.component.ApplicationMgrImpl$AppInitializer.run(ApplicationMgrImpl.java:2105)
      at com.ibm.ws.runtime.component.ComponentImpl$_AsynchInitializer.run(ComponentImpl.java:304)
      at com.ibm.ws.util.ThreadPool$Worker.run(ThreadPool.java(Compiled Code))
Caused by: java.lang.RuntimeException: java.lang.NullPointerException
      at com.ibm.ws.runtime.component.DeployedApplicationImpl.start(DeployedApplicationImpl.java:804)
      at com.ibm.ws.runtime.component.ApplicationMgrImpl.startApplication(ApplicationMgrImpl.java:920)
      ... 3 more
Caused by: java.lang.NullPointerException
      at com.ibm.ws.webcontainer.webapp.WebAppConfigurationHelper.constructServletMappings(WebAppConfigurationHelper.java:392)
      at com.ibm.ws.webcontainer.webapp.WebAppConfigurationHelper.createConfiguration(WebAppConfigurationHelper.java:137)
      at com.ibm.ws.webcontainer.metadata.WebMetaDataFactory.createMetaData(WebMetaDataFactory.java:167)
      at com.ibm.ws.runtime.component.MetaDataMgrImpl.createMetaDataFromFactories(MetaDataMgrImpl.java:169)
      at com.ibm.ws.runtime.component.MetaDataMgrImpl.createMetaData(MetaDataMgrImpl.java:303)
      at com.ibm.ws.runtime.component.DeployedModuleImpl.start(DeployedModuleImpl.java:541)
      at com.ibm.ws.runtime.component.DeployedApplicationImpl.start(DeployedApplicationImpl.java:754)
      ... 4 more

[5/7/09 19:28:50:256 UTC] 0000000a TCPChannel    A   TCPC0001I: TCP Channel TCP_2 is listening on host us97uap209ampxb  (IPv4: 159.202.154.135) port 25021.
[5/7/09 19:28:50:286 UTC] 0000000a WSChannelFram A   CHFW0019I: The Transport Channel Service has started chain WCInboundDefault.
[5/7/09 19:28:50:290 UTC] 0000000a WSChannelFram A   CHFW0019I: The Transport Channel Service has started chain SOAPAcceptorChain1.
[5/7/09 19:28:50:297 UTC] 0000002d SchedulerServ I   SCHD0077I: The Scheduler Service is starting the Schedulers.
[5/7/09 19:28:50:296 UTC] 0000000a ContainerImpl E   WSVR0501E: Error creating component null [class com.ibm.ws.runtime.component.ApplicationServerImpl]
com.ibm.ws.exception.RuntimeWarning: com.ibm.ws.exception.RuntimeError: java.lang.RuntimeException: java.lang.NullPointerException
      at com.ibm.ws.runtime.component.ApplicationMgrImpl.startApplications(ApplicationMgrImpl.java:797)
      at com.ibm.ws.runtime.component.ApplicationMgrImpl.start(ApplicationMgrImpl.java:544)
      at com.ibm.ws.runtime.component.ContainerImpl.startComponents(ContainerImpl.java:820)
      at com.ibm.ws.runtime.component.ContainerImpl.start(ContainerImpl.java:649)
      at com.ibm.ws.runtime.component.ApplicationServerImpl.start(ApplicationServerImpl.java:149)
      at com.ibm.ws.runtime.component.ContainerImpl.startComponents(ContainerImpl.java:820)
      at com.ibm.ws.runtime.component.ContainerImpl.start(ContainerImpl.java:649)
      at com.ibm.ws.runtime.component.ServerImpl.start(ServerImpl.java:444)
      at com.ibm.ws.runtime.WsServerImpl.bootServerContainer(WsServerImpl.java:187)
      at com.ibm.ws.runtime.WsServerImpl.start(WsServerImpl.java:133)
      at com.ibm.ws.runtime.WsServerImpl.main(WsServerImpl.java:387)
      at com.ibm.ws.runtime.WsServer.main(WsServer.java:53)
      at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
      at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:85)
      at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:58)
      at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:60)
      at java.lang.reflect.Method.invoke(Method.java:391)
      at com.ibm.ws.bootstrap.WSLauncher.run(WSLauncher.java:219)
      at java.lang.Thread.run(Thread.java:571)
Caused by: com.ibm.ws.exception.RuntimeError: java.lang.RuntimeException: java.lang.NullPointerException
      at com.ibm.ws.runtime.component.ApplicationMgrImpl.startApplication(ApplicationMgrImpl.java:944)
      at com.ibm.ws.runtime.component.ApplicationMgrImpl$AppInitializer.run(ApplicationMgrImpl.java:2105)
      at com.ibm.ws.runtime.component.ComponentImpl$_AsynchInitializer.run(ComponentImpl.java:304)
      at com.ibm.ws.util.ThreadPool$Worker.run(ThreadPool.java(Compiled Code))
Caused by: java.lang.RuntimeException: java.lang.NullPointerException
      at com.ibm.ws.runtime.component.DeployedApplicationImpl.start(DeployedApplicationImpl.java:804)
      at com.ibm.ws.runtime.component.ApplicationMgrImpl.startApplication(ApplicationMgrImpl.java:920)
      ... 3 more
Caused by: java.lang.NullPointerException
      at com.ibm.ws.webcontainer.webapp.WebAppConfigurationHelper.constructServletMappings(WebAppConfigurationHelper.java:392)
      at com.ibm.ws.webcontainer.webapp.WebAppConfigurationHelper.createConfiguration(WebAppConfigurationHelper.java:137)
      at com.ibm.ws.webcontainer.metadata.WebMetaDataFactory.createMetaData(WebMetaDataFactory.java:167)
      at com.ibm.ws.runtime.component.MetaDataMgrImpl.createMetaDataFromFactories(MetaDataMgrImpl.java:169)
      at com.ibm.ws.runtime.component.MetaDataMgrImpl.createMetaData(MetaDataMgrImpl.java:303)
      at com.ibm.ws.runtime.component.DeployedModuleImpl.start(DeployedModuleImpl.java:541)
      at com.ibm.ws.runtime.component.DeployedApplicationImpl.start(DeployedApplicationImpl.java:754)
      ... 4 more

[5/7/09 19:28:50:300 UTC] 0000002d SchedulerServ I   SCHD0078I: The Scheduler Service has completed starting the Schedulers.
[5/7/09 19:28:50:384 UTC] 0000000a RMIConnectorC A   ADMC0026I: The RMI Connector is available at port 26021
[5/7/09 19:28:52:349 UTC] 00000032 CacheServiceI I   DYNA1001I: WebSphere Dynamic Cache instance named ws/WSSecureMap initialized successfully.
[5/7/09 19:28:52:699 UTC] 00000035 DiscoveryMBea I   ADMD0023I: The system discovered process (name: nodeagent, type: NodeAgent, pid: 70616)
[5/7/09 19:28:53:070 UTC] 0000000a WsServerImpl  A   WSVR0002I: Server AP02us97uap209ampxbaaahonlneServer open for e-business, problems occurred during startup


After I get the following Exception I try to access the URL of the application and it gives me a 404 File not found error.
and in the sysout logs I notice the following
[5/7/09 22:38:57:945 UTC] 0000002c WebContainer  E   SRVE0017W: A WebGroup/Virtual Host to handle /AAHOnline_INTER_WEB/homeonline/jsp/Sample.jsp has not been defined.

Can someone help me bring the Application fine?

Answer : WSVR0501E Error creating component null

Thanks We resolved the problem by reconfiguring the virtual host files. and reinstalling the application.