Servlet request.getLocalName返回为空是什么问题?

Question

Spring webSocket 中自带有这样一行代码:

  public InetSocketAddress getLocalAddress() {
        return new InetSocketAddress(this.servletRequest.getLocalName(), this.servletRequest.getLocalPort());
    }

报的异常是这样的:

 Caused by: java.lang.IllegalArgumentException: hostname can't be null
    at java.net.InetSocketAddress.checkHost(InetSocketAddress.java:149)
    at java.net.InetSocketAddress.<init>(InetSocketAddress.java:216)
    at org.springframework.http.server.ServletServerHttpRequest.getLocalAddress(ServletServerHttpRequest.java:162)
    at org.springframework.web.socket.server.standard.AbstractStandardUpgradeStrategy.upgrade(AbstractStandardUpgradeStrategy.java:108)
    at org.springframework.web.socket.server.support.AbstractHandshakeHandler.doHandshake(AbstractHandshakeHandler.java:279)
    at org.springframework.web.socket.server.support.WebSocketHttpRe

questHandler.handleRequest(WebSocketHttpRequestHandler.java:166)
也就是说 request.getLocalName返回为空了,由于是spring中的代码,改不了,
所以只能从环境配置修复了.
我的代码在自己的开发机和测试机上没有问题

1,试过添加hosts 无效
2,试过添加hostname环境变量无效
3,还有tomcat能正常访问,正常部署,只在访问其中一个接口时出这个异常
4,换一个tomcat也不行
经过测试和在线调试,以下代码确实返回空的
request.getRemoteHost();也是空的
request.getRemoteAddr();也是空的

     public void getMessage(@PathVariable("serverName") String serverName, HttpServletResponse response, HttpServletRequest request){
        ga.push();
        coreService.doMock(request,response,serverName);
        if(request.getLocalName()==null){
            System.err.println("DEBUG:request.getLocalName() is null");
        }
    }

求大神

Answer 1

tomcat换个版本，有可能是bug