Will check again in XXXX seconds. 是根据什么确定的啊？咋时快时慢，时多时少？

[darasion]

Deploying new version.
Checking if new version is ready to serve.
Will check again in 1 seconds.
Checking if new version is ready to serve.
Will check again in 2 seconds.
Checking if new version is ready to serve.
Will check again in 4 seconds.
Checking if new version is ready to serve.
Will check again in 8 seconds.
Checking if new version is ready to serve.
Will check again in 16 seconds.
Checking if new version is ready to serve.
Will check again in 32 seconds.
Checking if new version is ready to serve.
Will check again in 60 seconds.
......

[xuming]

基本上是，前次时间x2，到一定程度之后，保持一定的间隔