alarm 模块从 redisli pop出event 后，反序列成im、mail 对象失败的问题

[WatchLucky]

遇到的问题是这样：触发告警以后，第一天告警信息 大概率 是 接收人、告警内容为空，导致发不出告警
打印日志发现 PopAllIM 函数 里 reply, err := redis.String(rc.Do("RPOP", queue)) 得到的replay 无法发序列化成im 对象。
log.Debugf("PopAllIM reply : %v", reply)
err = json.Unmarshal([]byte(reply), &im)
if err != nil {
log.Error(err, reply)
continue
}
log.Debugf("反序列化 im : %s", im.String())

log 如下：
time="2019-03-02T11:29:30+08:00" level=debug msg="delete event older than 2009-03-04 11:29:30, rows affected:0"
time="2019-03-02T11:30:01+08:00" level=debug msg="PopAllIM reply : {"Status":"PROBLEM","Priority":0,"Endpoint":"aaa","Metric":"Slave_SQL_Running","Tags":"db=mysql,ipaddr=1.1.1.1,module=mysql,optsystem=linux,port=10001,project=tdnotice,role=slave","Func":"all(#1)","LeftValue":"0","Operator":"!=","RightValue":"1","Note":"MySQL从库SQL线程告警","Max":3,"Current":1,"Timestamp":"2019-03-02 11:30:00","Link":"http://127.0.0.1:8081/portal/template/view/4\",\"Occur\":1,\"Subscriber\":[\"xxx\",\"xxx\",\"xxx\"],\"Uic\":\"xxxx\"}"
time="2019-03-02T11:30:01+08:00" level=debug msg="反序列化 im : <Tos:, Content:>"

正常的replay 应该是 {"tos":"xxx,bbb,ccc","content":"[P0][OK][ccc][][MySQL从库SQL线程告警 all(#1) Slave_SQL_Running db=mysql,ipaddr=1.1.1.1 ,module=mysql,optsystem=linux,port=10001,project=tdnotice,role=slave 1!=1][O1 2019-03-02 11:14:00]"}"

求解