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slave 往collector推送数据的时候失败：value is not illegal
master可以正常推送。
2020-04-01 10:20:04.002533 WARNING funcs/push.go:33 metric:<MetaData Endpoint:192.168.96.56, Metric:mysql.Read_Master_log_Pos, CounterType:GAUGE Timestamp:1585707601, Step:60, Value:, Tags:isSlave=1,port=3306,readOnly=0,type=mysql(map[isSlave:1 port:3306 readOnly:0 type:mysql])> err:value is not illegal:<MetaData Endpoint:192.168.96.56, Metric:mysql.Read_Master_log_Pos, CounterType:GAUGE Timestamp:1585707601, Step:60, Value:, Tags:isSlave=1,port=3306,readOnly=0,type=mysql(map[isSlave:1 port:3306 readOnly:0 type:mysql])>

数据库组件myMon 密码还有特殊字符的时候比如# cfg.Section("mysql").Key("password").String() 会导致 #后面的字符串丢弃 导致认证失败

2020/04/01 11:13:03.866 [I] [main.go:152] Send response 192.168.99.100:3306 - {"err":"metric:\u003cMetaData Endpoint:192.168.99.100, Metric:mysql.Read_Master_log_Pos, CounterType:GAUGE Timestamp:1585710781, Step:60, Value:\u003cnil\u003e, Tags:isSlave=1,port=3306,readOnly=0,type=mysql(map[isSlave:1 port:3306 readOnly:0 type:mysql])\u003e err:value is not illegal:\u003cMetaData Endpoint:192.168.99.100, Metric:mysql.Read_Master_log_Pos, CounterType:GAUGE Timestamp:1585710781, Step:60, Value:\u003cnil\u003e, Tags:isSlave=1,port=3306,readOnly=0,type=mysql(map[isSlave:1 port:3306 readOnly:0 type:mysql])\u003e"}