Hi. I have installed and configured Ambari using the guide here: https://cwiki.apache.org/confluence/display/AMBARI/Installation+Guide+for+Ambari+2.7.3. Unfortunately, I got the same error in this page. I already tried reinstalling twice but no success. I'm running Ubuntu on a Virtual Box running on Windows host. Any idea? Thanks. ... View more

Thank you Shu for your quick response. I followed your instructions regarding the PutMongoRecord processor. That helped simplify my flow a bit. If the RunMongoAggregation is working as I think it is, then as a FlowFile runs through the processor, it will "trigger" the processor and then route onto original, while the aggregation works on the database and output into "results" (see image below). Is that your thought process? Also -- I probably have to clear out the database I'm aggregating on between data-sets to prevent duplicates, do I not? @Shu ... View more