Major Description
Watson build 2151 - I flushed a bucket via the UI. The UI pops up a dialog asking for confirmation then after a short while the error in the screenshot below occurred. As an end-user this error doesn't describe what the nature of the problem was what the impact is or what action is necessary. As such it would probably be better to suppress the error entirely or replace it with a simple message such as "flush ongoing".
NB - this ticket is not about why the error occurred (which may be the subject of MB-18068) - this is specifically about popping up the unhelpful dialog in the UI.
