Github user zentol commented on the issue:
https://github.com/apache/flink/pull/2112
So we don't want to tie ourselves to DropWizard histograms, but the only
way for users to use a histogram right now _without implementing one themselves
(something that is too much work for us apparently)_ is to rely on DropWizard
histograms. This doesn't really fit together.
_Could_ we add other implementations? Sure! But I have a hard time
believing that we'll ever get around to doing that. If it doesn't make sense
now to implement one because the DW ones offer so much functionality, when
would it?
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