Github user srowen commented on the pull request:
https://github.com/apache/spark/pull/7229#issuecomment-118776821
No I mean farther up in "UpdateStateByKey Operation" where the operation is
explained, rather than putting this as a coda at the end after examples. You
can weave a comment into the examples too I suppose, to clarify what keys are
getting updated. I personally assumed the current behavior since there's
otherwise no way key's values change unless a new value arrives, and that can't
cover all use cases. Clarification never hurt though.
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