客户端连接出现(the conn has closed)后，客户端一直离线，不自动恢复！

[cdwangtao]

日志如下：
May 13 09:00:25 cpt.zqsyb.01 npc[2101]: 2020/05/13 09:00:25.857 [I] [client.go:67] Successful connection with xxxx?
May 13 09:36:00 cpt.zqsyb.01 npc[2101]: 2020/05/13 09:36:00.546 [E] [client.go:87] Accept server data error EOF, end this service
May 13 09:36:00 cpt.zqsyb.01 npc[2101]: 2020/05/13 09:36:00 close mux
May 13 09:36:00 cpt.zqsyb.01 npc[2101]: 2020/05/13 09:36:00.546 [W] [client.go:160] accpet error,the conn has closed
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