@vasu.tubati wrote:

I have HA LB configured with 3 backend servers . From the logs, i see that one of the nodes are going down frequently and coming up . Error message is like below.

eb 16 08:38:36 localhost haproxy[4303]: Server xxxxxxxx is DOWN, reason: Layer4 connection problem, info: "Connection refused", check duration: 0ms. 1 active and 0 backup servers left. 0 sessions active, 0 requeued, 0 remaining in queue.

haproxy version is as below.

HA-Proxy version 1.5.18 2016/05/10
Copyright 2000-2016 Willy Tarreau willy@haproxy.org

backend configuration is as below,

backend nodes
mode http
balance roundrobin #Balance algorithm
option forwardfor

option httpchk HEAD / HTTP/1.1\r\nHost:\ localhost #Check the server application is up and healty - 200 status code

server servr1 xx.xx.xx.xx:30010 check                 #Nginx1
server server2 xx.xx.xx.xx:30010 check                 #Nckend nodes
server server2 xx.xx.xx.xx:30010 check

Please help to why these connection refused and time out are occurring.. I have tested on backend servers and i can access the app without any issues directly.

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