java.util.LinkedHashMap$LinkedHashIterator.nextNode(LinkedHashMap.java:719)
    java.util.LinkedHashMap$LinkedValueIterator.next(LinkedHashMap.java:747)
    org.apache.struts2.dispatcher.mapper.DefaultActionMapper.parseNameAndNamespace(DefaultActionMapper.java:378)
    org.apache.struts2.dispatcher.mapper.DefaultActionMapper.getMapping(DefaultActionMapper.java:295)
    org.apache.struts2.dispatcher.PrepareOperations.findActionMapping(PrepareOperations.java:184)
    org.apache.struts2.dispatcher.filter.StrutsPrepareAndExecuteFilter.doFilter(StrutsPrepareAndExecuteFilter.java:135)
    org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1642)
    com.alibaba.druid.support.http.WebStatFilter.doFilter(WebStatFilter.java:123)
    org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1634)
    org.apache.logging.log4j.web.Log4jServletFilter.doFilter(Log4jServletFilter.java:71)
    org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1642)
    org.eclipse.jetty.servlet.ServletHandler.doHandle(ServletHandler.java:533)
    org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:146)
    org.eclipse.jetty.security.SecurityHandler.handle(SecurityHandler.java:548)
    org.eclipse.jetty.server.handler.HandlerWrapper.handle(HandlerWrapper.java:132)
    org.eclipse.jetty.server.handler.ScopedHandler.nextHandle(ScopedHandler.java:257)
    org.eclipse.jetty.server.session.SessionHandler.doHandle(SessionHandler.java:1595)
    org.eclipse.jetty.server.handler.ScopedHandler.nextHandle(ScopedHandler.java:255)
    org.eclipse.jetty.server.handler.ContextHandler.doHandle(ContextHandler.java:1317)
    org.eclipse.jetty.server.handler.ScopedHandler.nextScope(ScopedHandler.java:203)
    org.eclipse.jetty.servlet.ServletHandler.doScope(ServletHandler.java:473)
    org.eclipse.jetty.server.session.SessionHandler.doScope(SessionHandler.java:1564)
    org.eclipse.jetty.server.handler.ScopedHandler.nextScope(ScopedHandler.java:201)
    org.eclipse.jetty.server.handler.ContextHandler.doScope(ContextHandler.java:1219)
    org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:144)
    org.eclipse.jetty.server.handler.ContextHandlerCollection.handle(ContextHandlerCollection.java:219)
    org.eclipse.jetty.server.handler.HandlerCollection.handle(HandlerCollection.java:126)
    org.eclipse.jetty.server.handler.HandlerWrapper.handle(HandlerWrapper.java:132)
    org.eclipse.jetty.server.Server.handle(Server.java:531)
    org.eclipse.jetty.server.HttpChannel.handle(HttpChannel.java:352)
    org.eclipse.jetty.server.HttpConnection.onFillable(HttpConnection.java:260)
    org.eclipse.jetty.io.AbstractConnection$ReadCallback.succeeded(AbstractConnection.java:281)
    org.eclipse.jetty.io.FillInterest.fillable(FillInterest.java:102)
    org.eclipse.jetty.io.ChannelEndPoint$2.run(ChannelEndPoint.java:118)
    org.eclipse.jetty.util.thread.strategy.EatWhatYouKill.runTask(EatWhatYouKill.java:333)
    org.eclipse.jetty.util.thread.strategy.EatWhatYouKill.doProduce(EatWhatYouKill.java:310)
    org.eclipse.jetty.util.thread.strategy.EatWhatYouKill.tryProduce(EatWhatYouKill.java:168)
    org.eclipse.jetty.util.thread.strategy.EatWhatYouKill.run(EatWhatYouKill.java:126)
    org.eclipse.jetty.util.thread.ReservedThreadExecutor$ReservedThread.run(ReservedThreadExecutor.java:366)
    org.eclipse.jetty.util.thread.QueuedThreadPool.runJob(QueuedThreadPool.java:762)
    org.eclipse.jetty.util.thread.QueuedThreadPool$2.run(QueuedThreadPool.java:680)
    java.lang.Thread.run(Thread.java:745)