Best way to find the current alive jobmanager with HA mode zookeeper

[Yuan,Youjun]

Hi all,

I have a standalone cluster with 3 jobmanagers, and set high-availability to 
zookeeper. Our client submits job by REST API(POST /jars/:jarid/run), which 
means we need to know the host of the any of the current alive jobmanagers. The 
problem is that, how can we know which job manager is alive, or the host of 
current leader?  We don't want to access a dead JM.

Thanks.
Youjun Yuan