Layer 7 is succeeded but backend server status is not available

Hi, I am new to HAProxy. Trying to set up HAProxy server used for SSL termination.
I do not get the status of backend server though frontend Layer 7 pass the check.

haproxy -f /etc/haproxy/haproxy.cfg -d
Note: setting global.maxconn to 497.
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 filters :
[SPOE] spoe
[COMP] compression
[CACHE] cache
[TRACE] trace
Using epoll() as the polling mechanism.
[WARNING] 090/154308 (2587320) : Health check for server #######/############ succeeded, reason: Layer7 check passed, code: 200, info: “HTTP status check returned code <3C>200<3E>”, check duration: 29ms, status: 3/3 UP.
[ALERT] 090/154308 (2587320) : sendmsg()/writev() failed in logger #1: No such file or directory (errno=2)

Please help me what possible could have gone wrong.