Github user MikeThomsen commented on the issue:
https://github.com/apache/nifi/pull/2896
@zenfenan @mattyb149 can one of you review?
The goal here, btw, is to make it so that admins are able to easily share a
`MongoClient` between multiple processors. Per the
[docs](http://mongodb.github.io/mongo-java-driver/3.5/driver/getting-started/quick-start/#make-a-connection)
`MongoClient` is thread-safe and you should limit how many of them your
application creates:
> The MongoClient instance represents a pool of connections to the
database; you will only need one instance of class MongoClient even with
multiple threads.
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