Hi! I've run into some weird problem of many connections failed with SD status in log. And I have no idea how to discover the source of the problem.
>From the point of client it looks like this: * Client (located on the same machine as haproxy) successfully opens a connection to haproxy over loopback interfaces and sends http/1.1 get-request. * haproxy accepts request (ack was send) * after some time passed (usually 1ms longer then "timeout connect" set) haproxy just sends tcp-FIN with no user data in the packet. >From the point of haproxy I see this: 2019-05-21T13:30:02+03:00 haproxy[608365] local2.info 127.0.0.1:54064 [21/May/2019:13:30:01.289] some-host some-host/backend:80 0/1000/0/-1/1001 -1 0 - - SD-- 164/19/18/0/+1 0/0 "GET /some-request HTTP/1.1" And it doesn't matter how many retries I set for this backend section in config. Can you give me a hint, how to discover a real reason of this errors? # haproxy -vv HA-Proxy version 1.9.8-1 2019/05/15 - https://haproxy.org/ Build options : TARGET = linux2628 CPU = generic CC = gcc CFLAGS = -O2 -g -O2 -fPIE -fstack-protector-strong -Wformat -Werror=format-security -Wdate-time -D_FORTIFY_SOURCE=2 -fno-strict-aliasing -Wdeclaration-after-statement -fwrapv -Wno-unused-label -Wno-sign-compare -Wno-unused-parameter -Wno-old-style-declaration -Wno-ignored-qualifiers -Wno-clobbered -Wno-missing-field-initializers -Wtype-limits OPTIONS = USE_GETADDRINFO=1 USE_ZLIB=1 USE_REGPARM=1 USE_OPENSSL=1 USE_LUA=1 USE_SYSTEMD=1 USE_PCRE2=1 USE_PCRE2_JIT=1 USE_TFO=1 USE_NS=1 Default settings : maxconn = 2000, bufsize = 16384, maxrewrite = 1024, maxpollevents = 200 Built with OpenSSL version : OpenSSL 1.0.2g 1 Mar 2016 Running on OpenSSL version : OpenSSL 1.0.2g 1 Mar 2016 OpenSSL library supports TLS extensions : yes OpenSSL library supports SNI : yes OpenSSL library supports : TLSv1.0 TLSv1.1 TLSv1.2 Built with Lua version : Lua 5.3.1 Built with network namespace support. Built with transparent proxy support using: IP_TRANSPARENT IPV6_TRANSPARENT IP_FREEBIND Built with zlib version : 1.2.8 Running on zlib version : 1.2.8 Compression algorithms supported : identity("identity"), deflate("deflate"), raw-deflate("deflate"), gzip("gzip") Built with PCRE2 version : 10.21 2016-01-12 PCRE2 library supports JIT : yes Encrypted password support via crypt(3): yes Built with multi-threading support. Available polling systems : epoll : pref=300, test result OK poll : pref=200, test result OK select : pref=150, test result OK Total: 3 (3 usable), will use epoll. Available multiplexer protocols : (protocols marked as <default> cannot be specified using 'proto' keyword) h2 : mode=HTX side=FE|BE h2 : mode=HTTP side=FE <default> : mode=HTX side=FE|BE <default> : mode=TCP|HTTP side=FE|BE Available filters : [SPOE] spoe [COMP] compression [CACHE] cache [TRACE] trace -- Best regard, Maksim Kupriianov
