在生产服务器中，正在生成一系列以下异常，并且导致服务器重新启动。
请让我们知道以下异常的原因是什么。使用工作灯 6.1。
[8/31/17 9:00:53:093 IST] 000002ac ServletWrappe E com.ibm.ws.webcontainer.servlet.ServletWrapper service SRVE0068E: An exception was thrown by one of the service methods of the servlet [GadgetAPIServlet] in application [IBM_Worklight_Console]. Exception created : [com.worklight.server.auth.api.WorkLightAuthenticationException
at com.worklight.core.auth.impl.AuthenticationContext.checkAuthentication(AuthenticationContext.java:548)
at com.worklight.core.auth.impl.AuthenticationContext.processRealms(AuthenticationContext.java:414)
at com.worklight.core.auth.impl.AuthenticationContext.pushCurrentResource(AuthenticationContext.java:391)
at com.worklight.core.auth.impl.AuthenticationServiceBean.accessResource(AuthenticationServiceBean.java:75)
at com.worklight.integration.services.impl.DataAccessServiceImpl.invokeProcedureInternal(DataAccessServiceImpl.java:384)
at com.worklight.integration.services.impl.DataAccessServiceImpl.invokeProcedure(DataAccessServiceImpl.java:112)
at com.worklight.gadgets.serving.handler.BackendQueryHandler.getContent(BackendQueryHandler.java:184)
at com.worklight.gadgets.serving.handler.BackendQueryHandler.doPost(BackendQueryHandler.java:75)
at com.worklight.gadgets.serving.GadgetAPIServlet.doGetOrPost(GadgetAPIServlet.java:141)
at com.worklight.gadgets.serving.GadgetAPIServlet.doPost(GadgetAPIServlet.java:103)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:595)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:668)
at com.ibm.ws.webcontainer.servlet.ServletWrapper.service(ServletWrapper.java:1230)
at com.ibm.ws.webcontainer.servlet.ServletWrapper.handleRequest(ServletWrapper.java:779)
at com.ibm.ws.webcontainer.servlet.ServletWrapper.handleRequest(ServletWrapper.java:478)
at com.ibm.ws.webcontainer.servlet.ServletWrapperImpl.handleRequest(ServletWrapperImpl.java:178)
at com.ibm.ws.webcontainer.filter.WebAppFilterChain.invokeTarget(WebAppFilterChain.java:136)
at com.ibm.ws.webcontainer.filter.WebAppFilterChain.doFilter(WebAppFilterChain.java:97)
at com.worklight.core.auth.impl.AuthenticationFilter$1.execute(AuthenticationFilter.java:191)
at com.worklight.core.auth.impl.AuthenticationServiceBean.accessResource(AuthenticationServiceBean.java:76)
at com.worklight.core.auth.impl.AuthenticationFilter.doFilter(AuthenticationFilter.java:195)
at com.ibm.ws.webcontainer.filter.FilterInstanceWrapper.doFilter(FilterInstanceWrapper.java:195)
at com.ibm.ws.webcontainer.filter.WebAppFilterChain.doFilter(WebAppFilterChain.java:91)
at com.ibm.ws.webcontainer.filter.WebAppFilterManager.doFilter(WebAppFilterManager.java:967)
at com.ibm.ws.webcontainer.filter.WebAppFilterManager.invokeFilters(WebAppFilterManager.java:1107)
at com.ibm.ws.webcontainer.servlet.CacheServletWrapper.handleRequest(CacheServletWrapper.java:87)
at com.ibm.ws.webcontainer.WebContainer.handleRequest(WebContainer.java:939)
at com.ibm.ws.webcontainer.WSWebContainer.handleRequest(WSWebContainer.java:1662)
at com.ibm.ws.webcontainer.channel.WCChannelLink.ready(WCChannelLink.java:200)
at com.ibm.ws.http.channel.inbound.impl.HttpInboundLink.handleDiscrimination(HttpInboundLink.java:463)
at com.ibm.ws.http.channel.inbound.impl.HttpInboundLink.handleNewRequest(HttpInboundLink.java:530)
at com.ibm.ws.http.channel.inbound.impl.HttpInboundLink.processRequest(HttpInboundLink.java:316)
at com.ibm.ws.http.channel.inbound.impl.HttpICLReadCallback.complete(HttpICLReadCallback.java:88)
at com.ibm.ws.tcp.channel.impl.AioReadCompletionListener.futureCompleted(AioReadCompletionListener.java:175)
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:138)
at com.ibm.io.async.ResultHandler.complete(ResultHandler.java:204)
at com.ibm.io.async.ResultHandler.runEventProcessingLoop(ResultHandler.java:775)
at com.ibm.io.async.ResultHandler$2.run(ResultHandler.java:905)
at com.ibm.ws.util.ThreadPool$Worker.run(ThreadPool.java:1881)
]