Trying to perform the following HDF 3.0.x tutorial. https://hortonworks.com/tutorial/real-time-event-processing-in-nifi-sam-schema-registry-and-superset/ Getting a HTTP error code 404 (file not found) when trying to perform the following instruction. wget https://github.com/hortonworks/data-tutorials/raw/master/tutorials/hdf/realtime-event-processing-in-nifi-sam-sr-superset/assets/templates.zip Can you tell me how I can download the templates.zip file? ... View more

Does any one know why or under what circumstances NIFI passes a null flowfile to a custom NIFI processor ? We are seeing cases where the session that is passed in as an input to the onTrigger method of the custom (java) processor contains a session with a null flow file. Is this a normal condition ? We are treating it as an error case and logging it as an error. (Not sure if this is the correct thing to do. The following code inside of the custom processor's "onTrigger" method is returning a null flow file. FlowFile flowFile = session.get(); if (flowFile == null) { getLogger().error("End Invocation - Failure " + className + "Instance HashCode: " + hashCode + " onTrigger operation. Got null flowflile from session " + sessionHashCode +" and returning control to NIFI at " + System.currentTimeMillis()); return; } ... View more