Couchbase not starting for first time

I have installed couchbase 4.1.0 iin redhat machine. but couchbase is not starting . when i kill and start the service 2-3 times then it is starting
and also i am getting below info message.
ns_memcached:connect:1290]Unable to connect: {error,{badmatch,{error,econnrefused}}}, retrying.

is it a bug in version 4.1.0…?

is this a single node deployment? do you have anti virus SW that may present us from listening on our default ports?

These are redhat machines. i am not able to start the couchbase server after installation. once i kill process related couchbase and then start is working.
looks like some processes are running partially.