Github user basvank commented on the issue:
https://github.com/apache/nifi/pull/1037
@pvillard31 (and @bartoszjkwozniak) is it possible that something went
wrong when merging this feature, maybe because the checks failed? It seems the
ValidateJson processor did not end up in the master branch or any of the
releases (I'm on 1.1.1).
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