webSphere was 管理控制台 报空指针错 如何解决啊

处理请求时发生一个错误： /ibm/console/secure/console.jsp
消息： java.lang.NullPointerException
StackTrace:
java.lang.NullPointerException
    at _ibmjsp.secure._console._jspService(_console.java:157)
    at com.ibm.ws.jsp.runtime.HttpJspBase.service(HttpJspBase.java:93)
    at javax.servlet.http.HttpServlet.service(HttpServlet.java:856)
    at com.ibm.ws.webcontainer.servlet.ServletWrapper.service(ServletWrapper.java:1577)
    at com.ibm.ws.webcontainer.servlet.ServletWrapper.service(ServletWrapper.java:1521)
    at com.ibm.ws.webcontainer.filter.WebAppFilterChain.doFilter(WebAppFilterChain.java:113)
    at com.ibm.ws
.webcontainer.filter.WebAppFilterChain._doFilter(WebAppFilterChain.java:82)
    at com.ibm.ws.webcontainer.servlet.ServletWrapper.handleRequest(ServletWrapper.java:759)
    at com.ibm.wsspi.webcontainer.servlet.GenericServletWrapper.handleRequest(GenericServletWrapper.java:121)
    at com.ibm.ws.jsp.webcontainerext.JSPExtensionServletWrapper.handleRequest(JSPExtensionServletWrapper.java:215)
    at com.ibm.ws.webcontainer.webapp.WebAppRequestDispatcher.forward(WebAppRequestDispatcher.java:347)
    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 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.Http
Servlet.service(HttpServlet.java:856)
    at com.ibm.ws.webcontainer.servlet.ServletWrapper.service(ServletWrapper.java:1577)
    at com.ibm.ws.webcontainer.servlet.ServletWrapper.service(ServletWrapper.java:1521)
    at com.ibm.ws.webcontainer.filter.WebAppFilterChain.doFilter(WebAppFilterChain.java:136)
    at com.ibm.ws.console.core.servlet.WSCUrlFilter.continueStoringTaskState(WSCUrlFilter.java:311)
    at com.ibm.ws.console.core.servlet.WSCUrlFilter.doFilter(WSCUrlFilter.java:185)
    at com.ibm.ws.webcontainer.filter.FilterInstanceWrapper.doFilter(FilterInstanceWrapper.java:142)
    at com.ibm.ws.we
bcontainer.filter.WebAppFilterChain.doFilter(WebAppFilterChain.java:121)
    at com.ibm.ws.webcontainer.filter.WebAppFilterChain._doFilter(WebAppFilterChain.java:82)
    at com.ibm.ws.webcontainer.servlet.ServletWrapper.handleRequest(ServletWrapper.java:759)
    at com.ibm.ws.webcontainer.servlet.CacheServletWrapper.handleRequest(CacheServletWrapper.java:89)
    at com.ibm.ws.webcontainer.WebContainer.handleRequest(WebContainer.java:1936)
    at com.ibm.ws.webcontainer.channel.WCChannelLink.ready(WCChannelLink.java:114)
    at com.ibm.ws.http.channel.inbound.impl.HttpInboundLink.handleDiscrimination(Htt
pInboundLink.java:472)
    at com.ibm.ws.http.channel.inbound.impl.HttpInboundLink.handleNewInformation(HttpInboundLink.java:411)
    at com.ibm.ws.http.channel.inbound.impl.(HttpICLReadCallback.java:101)
    at com.ibm.ws.ssl.channel.impl.SSLReadServiceContext$(SSLReadServiceContext.java:1704)
    at com.ibm.ws.tcp.channel.impl.WorkQueueManager.requestComplete(WorkQueueManager.java:566)
    at com.ibm.ws.tcp.channel.impl.WorkQueueManager.attemptIO(WorkQueueManager.java:619)
    at com.ibm.ws.tcp.channel.impl.WorkQueueManager.workerRun(WorkQue
ueManager.java:952)
    at com.ibm.ws.tcp.channel.impl.WorkQueueManager$Worker.run(WorkQueueManager.java:1039)
    at com.ibm.ws.util.ThreadPool$Worker.run(ThreadPool.java(Compiled Code))