Github user Condla commented on the issue:
https://github.com/apache/metron/pull/1290
@simonellistonball the inputTopic is used in the SimpleStormKafkaBuilder.
https://github.com/apache/metron/blob/877b510146456f2eed6eb12c35b1124c35b00aa5/metron-platform/metron-parsers/src/main/java/org/apache/metron/parsers/topology/ParserTopologyBuilder.java#L213---
