lower version, for example 2.6.8
```properties
dubbo.provider.version=1.0
```

2.7.6 failed to recognize the provider url with 'default.version=1.0' key,  it only takes 'version.1.0' into consideration.

}
    public String getPassword() {
        return password;
    }
    public URL setPassword(String password) {
        return new URL(protocol, username, password, host, port, path, getParameters());
    }
    public String getAuthority() {
        if (StringUtils.isEmpty(username)
                && StringUtils.isEmpty(password)) {
            return null;
        }
        return (username == null ? "" : username)
                + ":" + (password == null ? "" : password);
    }
    public String getHost() {
        return host;
    }
    public URL setHost(String host) {
        return new URL(protocol, username, password, host, port, path, getParameters());
    }
    /**
     * Fetch IP address for this URL.
     * <p>
     * Pls. note that IP should be used instead of Host when to compare with socket's address or to search in a map
     * which use address as its key.
     *
     * @return ip in string format
     */
    public String getIp() {