Github user pvillard31 commented on a diff in the pull request: https://github.com/apache/nifi/pull/2698#discussion_r188345339 --- Diff: nifi-nar-bundles/nifi-standard-bundle/nifi-standard-processors/src/main/java/org/apache/nifi/processors/standard/ExtractGrok.java --- @@ -234,6 +247,11 @@ public void onStopped() { @OnScheduled public void onScheduled(final ProcessContext context) throws GrokException, IOException { + + if (context.getProperty(KEEP_EMPTY_CAPTURES).isSet()) { --- End diff -- with required=true, you would not need to check if the property is set anymore
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