Github user mcgilman commented on the issue:
https://github.com/apache/nifi/pull/1306
So far the changes look good. One suggestion I'd like to offer is rendering
something in this batch settings when there is nothing configured. Typically,
we use a string like 'No value set' or relay this fact.

Have we considered providing default values for any of the batch settings?
We effectively already have that for the duration but the user is only aware of
that through the tooltip. Maybe the default value for the duration is 500
millis?
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