goc clear清理覆盖率失败了

[HeartIsBeat]

1.k8s下，因为容器越滚越多，注册上来的address，好多无效的

这就直接导致：goc clear --service=xxx报错
{"error":"Post "http://10.0.242.41:42286/v1/cover/clear\": read tcp 10.0.241.88:56078-\u003e10.0.242.41:42286: read: connection reset by peer"}