记录一下codis遇到的这个情况，在客户端连接销毁时如果执行quit命令，有较高概率返回的数据不完整，导致客户端解析出错。具体的说是缺少了”+OK”这几个字符，在redis里执行quit命令返回的结果里会有”+OK”:

$ telnet redis-server 6379
Trying xxx.xxx.xxx.xxx...
Connected to xxx.xxx.xxx.xxx.
Escape character is '^]'.
quit
+OK
Connection closed by foreign host.

而在codis上有时返回的数据缺乏“+OK”

$ telnet codis-server 19000
Trying yyy.yyy.yyy.yyy...
Connected to yyy.yyy.yyy.yyy.
Escape character is '^]'.
quit
Connection closed by foreign host.

还没有去查codis服务器端，先做个记录。