sir:
  can you help me resolve the problem?
    java.lang.StringIndexOutOfBoundsException: String index out of range: -1
        at java.lang.String.substring(String.java:1525)
        at 
weblogic.servlet.internal.WebAppHelper.resolveManifestName(WebAppHelper.java:469)
        at 
weblogic.servlet.internal.WebAppHelper.extractClassFiles(WebAppHelper.java:234)
        at 
weblogic.servlet.internal.WebAppServletContext.extractClassFiles(WebAppServletContext.java:3407)
        at 
weblogic.servlet.internal.WebAppServletContext.setDocroot(WebAppServletContext.java:3376)
        at 
weblogic.servlet.internal.WebAppServletContext.init(WebAppServletContext.java:862)
        at 
weblogic.servlet.internal.WebAppServletContext.<init>(WebAppServletContext.java:815)
        at weblogic.servlet.internal.HttpServer.loadWebApp(HttpServer.java:428)
        at weblogic.j2ee.WebAppComponent.deploy(WebAppComponent.java:74)
        at weblogic.j2ee.Application.addComponent(Application.java:163)
        at weblogic.j2ee.J2EEService.addDeployment(J2EEService.java:117)
        at 
weblogic.management.mbeans.custom.DeploymentTarget.addDeployment(DeploymentTarget.java:329)
        at 
weblogic.management.mbeans.custom.DeploymentTarget.addDeployment(DeploymentTarget.java:144)
        at 
weblogic.management.mbeans.custom.WebServer.addWebDeployment(WebServer.java:76)
        at java.lang.reflect.Method.invoke(Native Method)
        at 
weblogic.management.internal.DynamicMBeanImpl.invokeLocally(DynamicMBeanImpl.java:636)
        at 
weblogic.management.internal.DynamicMBeanImpl.invoke(DynamicMBeanImpl.java:621)
        at 
weblogic.management.internal.ConfigurationMBeanImpl.invoke(ConfigurationMBeanImpl.java:359)
        at com.sun.management.jmx.MBeanServerImpl.invoke(MBeanServerImpl.java:1555)
        at com.sun.management.jmx.MBeanServerImpl.invoke(MBeanServerImpl.java:1523)
        at weblogic.management.internal.MBeanProxy.invoke(MBeanProxy.java:468)
        at weblogic.management.internal.MBeanProxy.invoke(MBeanProxy.java:209)
        at $Proxy29.addWebDeployment(Unknown Source)
        at 
weblogic.management.configuration.WebServerMBean_CachingStub.addWebDeployment(WebServerMBean_CachingStub.java:1121)
        at 
weblogic.management.mbeans.custom.DeploymentTarget.addDeployment(DeploymentTarget.java:315)
        at 
weblogic.management.mbeans.custom.DeploymentTarget.addDeployment(DeploymentTarget.java:144)
        at java.lang.reflect.Method.invoke(Native Method)
        at 
weblogic.management.internal.DynamicMBeanImpl.invokeLocally(DynamicMBeanImpl.java:636)
        at 
weblogic.management.internal.DynamicMBeanImpl.invoke(DynamicMBeanImpl.java:621)
        at 
weblogic.management.internal.ConfigurationMBeanImpl.invoke(ConfigurationMBeanImpl.java:359)
        at com.sun.management.jmx.MBeanServerImpl.invoke(MBeanServerImpl.java:1555)
        at com.sun.management.jmx.MBeanServerImpl.invoke(MBeanServerImpl.java:1523)
        at 
weblogic.management.internal.ConfigurationMBeanImpl.updateConfigMBeans(ConfigurationMBeanImpl.java:491)
        at 
weblogic.management.internal.ConfigurationMBeanImpl.invoke(ConfigurationMBeanImpl.java:361)
        at com.sun.management.jmx.MBeanServerImpl.invoke(MBeanServerImpl.java:1555)
        at com.sun.management.jmx.MBeanServerImpl.invoke(MBeanServerImpl.java:1523)
        at weblogic.management.internal.MBeanProxy.invoke(MBeanProxy.java:468)
        at weblogic.management.internal.MBeanProxy.invoke(MBeanProxy.java:209)
        at $Proxy12.addDeployment(Unknown Source)
        at 
weblogic.management.internal.DynamicMBeanImpl.updateDeployments(DynamicMBeanImpl.java:1516)
        at 
weblogic.management.internal.DynamicMBeanImpl.setAttribute(DynamicMBeanImpl.java:895)
        at 
weblogic.management.internal.DynamicMBeanImpl.setAttribute(DynamicMBeanImpl.java:847)
        at 
weblogic.management.internal.ConfigurationMBeanImpl.setAttribute(ConfigurationMBeanImpl.java:295)
        at 
com.sun.management.jmx.MBeanServerImpl.setAttribute(MBeanServerImpl.java:1356)
        at 
com.sun.management.jmx.MBeanServerImpl.setAttribute(MBeanServerImpl.java:1331)
        at weblogic.management.internal.MBeanProxy.setAttribute(MBeanProxy.java:322)
        at weblogic.management.internal.MBeanProxy.invoke(MBeanProxy.java:204)
        at $Proxy60.setTargets(Unknown Source)
        at java.lang.reflect.Method.invoke(Native Method)
        at 
weblogic.management.console.info.FilteredMBeanAttribute.doSet(FilteredMBeanAttribute.java:92)
        at 
weblogic.management.console.actions.mbean.DoEditMBeanAction.perform(DoEditMBeanAction.java:135)
        at 
weblogic.management.console.actions.internal.ActionServlet.doAction(ActionServlet.java:171)
        at 
weblogic.management.console.actions.internal.ActionServlet.doPost(ActionServlet.java:85)
        at javax.servlet.http.HttpServlet.service(HttpServlet.java:760)
        at javax.servlet.http.HttpServlet.service(HttpServlet.java:853)
        at 
weblogic.servlet.internal.ServletStubImpl.invokeServlet(ServletStubImpl.java:265)
        at 
weblogic.servlet.internal.ServletStubImpl.invokeServlet(ServletStubImpl.java:200)
        at 
weblogic.servlet.internal.WebAppServletContext.invokeServlet(WebAppServletContext.java:2495)
        at 
weblogic.servlet.internal.ServletRequestImpl.execute(ServletRequestImpl.java:2204)
        at weblogic.kernel.ExecuteThread.execute(ExecuteThread.java:139)
        at weblogic.kernel.ExecuteThread.run(ExecuteThread.java:120)

    i use weblogic6.1 sp2 to deploy web application,but when i deploy it an exception 
occurs!i must to resolve the problem!
                                                                                       
      guolin wang
        

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