[WARNING] 122/110932 (4271) : Server http-servers/cook2 is DOWN, reason: Layer4 timeout, check duration: 2001ms. [ALERT] 122/110932 (4271) : backend 'http-servers' has no server available! sudo tcpdump -nlAS -vvv -s 0 -i br1 host X.X.X.X tcpdump: listening on br1, link-type EN10MB (Ethernet), capture size 65535 bytes 11:12:14.932517 IP (tos 0x0, ttl 64, id 11187, offset 0, flags [DF], proto TCP (6), length 60) 172.22.0.222.50068 > X.X.X.X.80: Flags [S], cksum 0xe87a (incorrect -> 0x25b4), seq 3843169601, win 14600, options [mss 1460,sackOK,TS val 63780594 ecr 0,nop,wscale 7], length 0 E..<+.@.@.&.....Y..B...P...A......9..z......... ..6......... 11:12:14.933102 IP (tos 0x0, ttl 63, id 0, offset 0, flags [DF], proto TCP (6), length 60) X.X.X.X.80 > 172.22.0.222.50068: Flags [S.], cksum 0xf71a (correct), seq 623012344, ack 3843169602, win 14480, options [mss 1460,sackOK,TS val 42114404 ecr 63780594,nop,wscale 6], length 0 E..<..@.?.SpY..B.....P..%"i....B..8............ ...d..6..... 11:12:14.933138 IP (tos 0x0, ttl 64, id 11188, offset 0, flags [DF], proto TCP (6), length 52) 172.22.0.222.50068 > X.X.X.X.80: Flags [.], cksum 0xe872 (incorrect -> 0x5e03), seq 3843169602, ack 623012345, win 115, options [nop,nop,TS val 63780594 ecr 42114404], length 0 E..4+.@.@.&.....Y..B...P...B%"i....s.r..... ..6....d 11:12:14.933294 IP (tos 0x0, ttl 64, id 11189, offset 0, flags [DF], proto TCP (6), length 527) 172.22.0.222.50068 > X.X.X.X.80: Flags [P.], cksum 0xea4d (incorrect -> 0x1063), seq 3843169602:3843170077, ack 623012345, win 115, options [nop,nop,TS val 63780594 ecr 42114404], length 475 E...+.@.@.$.....Y..B...P...B%"i....s.M..... ..6....dGET /oowahboh6eibooca HTTP/1.1 Host: X.X.X.X Connection: keep-alive Cache-Control: max-age=0 Accept: text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8 User-Agent: Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.22 (KHTML, like Gecko) Ubuntu Chromium/25.0.1364.160 Chrome/25.0.1364.160 Safari/537.22 Accept-Encoding: gzip,deflate,sdch Accept-Language: en-GB,en-US;q=0.8,en;q=0.6 Accept-Charset: ISO-8859-1,utf-8;q=0.7,*;q=0.3 Cookie: apps=apps1 11:12:14.933660 IP (tos 0x0, ttl 63, id 62621, offset 0, flags [DF], proto TCP (6), length 71) X.X.X.X.80 > 172.22.0.222.50068: Flags [F.], cksum 0x93ad (correct), seq 623012345:623012364, ack 3843169602, win 227, options [nop,nop,TS val 42114404 ecr 63780594], length 19 E..G..@.?.^.Y..B.....P..%"i....B........... ...d..6.HTTP/1.0 200 OK