I tried following -:
When 0 is provided as number in yarn.nodemanager.webapp.address.
NM instantiate WebServer as 0 piort e.g.
After that WebServer pick up some random port e.g.
And NM WebServer responds correctly but
RM's cluster/Nodes page shows the following -:
Whereas NM:0 is not clickable.
Seems even NM's webserver pick random port but it never gets updated and so NM report 0 as HTTP port to RM causing NM Hyperlinks un-clickable
But verified that MR job runs successfully with random.