Github user kkhatua commented on the issue:
https://github.com/apache/drill/pull/1241
Screenshot of when UI node `kk127` goes down. The UI's javascript logic
queries other Drillbits in the list (in this case, `kk128`) and discovers two
new previously unseen Drillbits - `kk130` and `kk129`, discovered in the
sequence in which they were discovered in the cluster. State changes are marked
correctly, with shutdown buttons disabled.
A prompt in the form of an orange refresh button near the Drillbit count
indicates the need to refresh. Alternatively, one of the other nodes can be
used for pop-out of a new WebUI.
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