Hi, I wonder if it's a bug. It confused me. recv in ngx_http_discard_request_body return 0, but ignored(suppose to close conntection soon). So the connection will stay in keepalive timer untill timeout, while client already closed and server stay in CLOSE_WAIT.
nginx version: nginx/1.17.6 built by gcc 4.4.6 20110731 (Red Hat 4.4.6-4) (GCC) built with OpenSSL 1.1.1c 28 May 2019 TLS SNI support enabled configure arguments: --with-debug --prefix=/home/qspace/nginx --user=qspace --group=users --with-http_ssl_module --with-http_v2_module --with-http_gzip_static_module --with-http_stub_status_module --with-openssl=../openssl-1.1.1c --with-pcre=../pcre-4.3 --with-stream nginx.conf: keepalive_timeout 65; keepalive_requests 2048; limit_conn_zone $binary_remote_addr zone=connperip:10m; limit_conn connperip 1; (make it redirect to /503.html) request: body not empty, i.e, content_len != 0 e.g. curl "http://127.0.0.1"; -F "file=@some_file" (close conntection after curl exit) ngx_http_core_generic_phase -> ngx_http_finalize_request-> ngx_http_special_response_handler -> ngx_http_discard_request_body ------------------------------------------------------------------------------------------------------------------ nginx debug log: 125812:2020/01/07 16:04:18 [debug] 12255#0: *102094 **http run request: "/50x.html?"** 125815:2020/01/07 16:04:18 [debug] 12255#0: *102094 **http read discarded body** 125820:2020/01/07 16:04:18 [debug] 12255#0: *102094 **recv: eof:1, avail:-1** 125827:2020/01/07 16:04:18 [debug] 12255#0: *102094 **recv: fd:14 0 of 4096** 125831:2020/01/07 16:04:18 [debug] 12255#0: *102094 http finalize request: -4, "/50x.html?" a:1, c:1 125834:2020/01/07 16:04:18 [debug] 12255#0: *102094 **set http keepalive handler** 125837:2020/01/07 16:04:18 [debug] 12255#0: *102094 http close request 125841:2020/01/07 16:04:18 [debug] 12255#0: *102094 http log handler 125862:2020/01/07 16:04:18 [debug] 12255#0: *102094 run cleanup: 00000000028D3F10 125867:2020/01/07 16:04:18 [debug] 12255#0: *102094 file cleanup: fd:15 125872:2020/01/07 16:04:18 [debug] 12255#0: *102094 free: 00000000028D3190, unused: 48 125877:2020/01/07 16:04:18 [debug] 12255#0: *102094 free: 00000000028D41A0, unused: 2655 125881:2020/01/07 16:04:18 [debug] 12255#0: *102094 free: 0000000002883620 125883:2020/01/07 16:04:18 [debug] 12255#0: *102094 hc free: 0000000000000000 125887:2020/01/07 16:04:18 [debug] 12255#0: *102094 hc busy: 0000000000000000 0 125890:2020/01/07 16:04:18 [debug] 12255#0: *102094 reusable connection: 1 125896:2020/01/07 16:04:18 [debug] 12255#0: *102094 event timer del: 14: 8799496244 125900:2020/01/07 16:04:18 [debug] 12255#0: *102094 event timer add: 14: 65000:8799556448 **...... after 65 second (keepalive_timeout)** 3928328:2020/01/07 16:05:23 [debug] 12255#0: *102094 event timer del: 14: 8799556448 3928329:2020/01/07 16:05:23 [debug] 12255#0: *102094 http keepalive handler 3928330:2020/01/07 16:05:23 [debug] 12255#0: *102094 **close http connection: 14** 3928331:2020/01/07 16:05:23 [debug] 12255#0: *102094 reusable connection: 0 3928332:2020/01/07 16:05:23 [debug] 12255#0: *102094 free: 0000000000000000 3928333:2020/01/07 16:05:23 [debug] 12255#0: *102094 free: 00000000028D1250, unused: 136 Thanks! Posted at Nginx Forum: https://forum.nginx.org/read.php?2,286665,286665#msg-286665 _______________________________________________ nginx mailing list nginx@nginx.org http://mailman.nginx.org/mailman/listinfo/nginx
