the problem of returning of healthcheck

[swordGH]

my code in nginx.conf

upstream swordnet.com{
        server 127.0.0.1:18080;#two tomcats have bean started
        server 127.0.0.1:28080;
    }

lua_shared_dict ngx_stats 500m;
lua_shared_dict healthcheck 1m;
lua_socket_log_errors off;
init_worker_by_lua_block {
    local hc = require "resty.upstream.healthcheck"
    local ok, err = hc.spawn_checker {
        shm = "healthcheck",
        type = "http",
        upstream = "swordnet.com",
        http_req = "GET /health.txt HTTP/1.0\r\nHost: swordnet.com\r\n\r\n",
        valid_statuses = {200, 302}
    }
    if not ok then
    ngx.log(ngx.ERR, "=======> failed to spawn health checker: ", err)
    return
    end
}

.................

location /server/status {
            access_log off;
            default_type text/plain;
            allow 127.0.0.1;
            deny all;
            content_by_lua_block {
                local hc = require "resty.upstream.healthcheck"
                ngx.say("Nginx Worker PID: ", ngx.worker.pid())
                ngx.print(hc.status_page())
            }
        }

when I visited the url http://localhost/server/status on browser. It showed as below:

Nginx Worker PID: 12158
Upstream swordnet.com
    Primary Peers
        127.0.0.1:18080 DOWN
        127.0.0.1:28080 DOWN
    Backup Peers

all the visiting became 502 gateway problems, and the error.log no live upstreams while connecting to upstream, client: 127.0.0.1, server: localhost, request: "GET / HTTP/1.1", upstream: "http://swordnet.com/", host: "localhost:81" but when I changed the upstream = "swordnet.com" into something else but swordnet.com everything became normal again but no matter what's the status tomcats was (started,stoped),It always showed as below:

Nginx Worker PID: 13742
Upstream swordnet.com (NO checkers)
    Primary Peers
        127.0.0.1:18080 up
        127.0.0.1:28080 up
    Backup Peers

[jansony1]

+1