创建多个httpd服务器时，只能访问其中一个，第二个无法访问的原因？

创建了多个httpd服务器。80、81和89三个端口

I (5207) app_httpd: Starting stream server on port: '81'

D (5217) httpd: httpd_thread: web server started

D (5217) httpd_uri: httpd_register_uri_handler: [0] installed /stream

D (5217) httpd: httpd_server: doing select maxfd+1 = 59



I (5227) app_httpd: [1605]:Starting OTA server on port: '89'

D (5237) httpd: httpd_thread: web server started

D (5237) httpd_uri: httpd_register_uri_handler: [0] installed /ota

D (5237) httpd: httpd_server: doing select maxfd+1 = 62

D (5257) httpd_uri: httpd_find_uri_handler: [0] = /ota



访问80，可以打开web，访问81也可以。

但是访问89打不开,为什么呢？



D (43277) httpd: httpd_server: processing listen socket 60

W (43287) httpd: httpd_accept_conn: error in accept (23)

W (43287) httpd: httpd_server: error accepting new connection

D (43287) httpd: httpd_server: doing select maxfd+1 = 62

D (43897) httpd: httpd_server: processing listen socket 60

W (43897) httpd: httpd_accept_conn: error in accept (23)

W (43897) httpd: httpd_server: error accepting new connection

D (43897) httpd: httpd_server: doing select maxfd+1 = 62

D (43967) httpd: httpd_server: processing listen socket 60

W (43967) httpd: httpd_accept_conn: error in accept (23)

W (43967) httpd: httpd_server: error accepting new connection

D (43977) httpd: httpd_server: doing select maxfd+1 = 62

D (43987) httpd: httpd_server: processing listen socket 54

D (43987) httpd_sess: httpd_sess_close_lru: Closing session with fd 63

D (43997) httpd: httpd_server: doing select maxfd+1 = 64

D (43997) httpd: httpd_server: processing ctrl message

D (43997) httpd: httpd_process_ctrl_msg: work

D (44007) httpd_sess: httpd_sess_delete: fd = 63

D (44017) httpd_sess: httpd_sess_delete: active sockets: 0

D (44017) httpd: httpd_server: processing listen socket 54

D (44027) httpd: httpd_accept_conn: newfd = 63

D (44027) httpd_sess: httpd_sess_new: fd = 63

D (44027) httpd_sess: httpd_sess_new: active sockets: 1

D (44037) httpd: httpd_accept_conn: complete

D (44037) httpd: httpd_server: doing select maxfd+1 = 64

D (44977) httpd: httpd_server: processing listen socket 60

W (44987) httpd: httpd_accept_conn: error in accept (23)

W (44987) httpd: httpd_server: error accepting new connection

D (44987) httpd: httpd_server: doing select maxfd+1 = 62