read packet error issue

[aki29]

When i test hmq in cluster mod (port 1993), it show

{"level":"info","timestamp":"2021-05-21T18:05:01.902+0800","logger":"broker","caller":"broker/broker.go:275","msg":"read connect from ","clientID":"mosqpub|3118-ey-PORTEGE"}
{"level":"error","timestamp":"2021-05-21T18:05:01.960+0800","logger":"broker","caller":"broker/client.go:174","msg":"read packet error: ","error":"EOF","ClientID":"mosqpub|3118-ey-PORTEGE","stacktrace":"github.com/fhmq/hmq/broker.(*client).readLoop\n\t/root/go/src/github.com/fhmq/hmq/broker/client.go:174\ngithub.com/fhmq/hmq/broker.(*Broker).handleConnection\n\t/root/go/src/github.com/fhmq/hmq/broker/broker.go:377"}