It seems that funnels should not require a thread; they do not actually process data. However, looking into the code for both 1.8.0 [1] and master [2], it seems that a thread is allocated to each funnel when gathering the status of a Process Group. Does this count against threads available to be allocated to processors?
[1] https://github.com/apache/nifi/blob/98aabf2c50f857efc72fd6f2bfdd9965b97fa195/nifi-nar-bundles/nifi-framework-bundle/nifi-framework/nifi-framework-core/src/main/java/org/apache/nifi/controller/FlowController.java#L3326 [2] https://github.com/apache/nifi/blob/e4be06c7c8a4801e375344954e442bb15aa3f636/nifi-nar-bundles/nifi-framework-bundle/nifi-framework/nifi-framework-core/src/main/java/org/apache/nifi/controller/FlowController.java#L1936 Thanks, Mark
