2.7.0版本getContextPath方法：
```
protected String getContextPath(URL url) {
        String contextPath = url.getPath();
        return contextPath.endsWith("/") ? contextPath.substring(0,contextPath.length()-1) : contextPath;
    }
```
无法将方法置入web容器中，退回2.6.5版本的方法：
```
protected String getContextPath(URL url) {
        int pos = url.getPath().lastIndexOf("/");
        return pos > 0 ? url.getPath().substring(0, pos) : "";
    }
```
使用正常，两个方法应该不等价的。
}
        map.put(Constants.BIND_IP_KEY, hostToBind);
        // 
        String hostToRegistry = getValueFromConfig(protocolConfig, Constants.DUBBO_IP_TO_REGISTRY);
        if (StringUtils.isEmpty(hostToRegistry)) {
            // 
            hostToRegistry = hostToBind;
        }
        map.put(Constants.ANYHOST_KEY, String.valueOf(anyhost));
        return hostToRegistry;
    }
    private String findHostToBindByConnectRegistries(List<URL> registryURLs) {
        if (CollectionUtils.isNotEmpty(registryURLs)) {
            for (URL registryURL : registryURLs) {
                if (Constants.MULTICAST.equalsIgnoreCase(registryURL.getParameter("registry"))) {
                    // 
                    continue;
                }
                try (Socket socket = new Socket()) {
                    SocketAddress addr = new InetSocketAddress(registryURL.getHost(), registryURL.getPort());
                    socket.connect(addr, 1000);
                    return socket.getLocalAddress().getHostAddress();
                } catch (Exception e) {
                    logger.warn(e.getMessage(), e);
                }
            }
        }
        return null;
    }
    /**