Not enough master nodes discovered during pinging...

[duycuong87vn]

I followed your instructions and had problems during deploy stack,
not enough master nodes discovered during pinging (found [[Candidate {node = {master1} {zAq0JMTKT-CpcIxYJ3eHoA} {fLunFll8QmSEXl232IfOGQ} {10.0.12.9} {10.0.12.9:9300} {ml.machine_memory = 4294967296, xpack.installed = true , ml.max_open_jobs = 20, ml.enabled = true}, clusterStateVersion = -1}]], but needed [2]), pinging again
I tried to add,

http.port: 9200
transport.tcp.port: 9300

but still got the same error,
Please help me find out the problem, thanks,

[duycuong87vn]

The problem has been resolved.