A Modern Event Platform goal this quarter is deploy an EventGate service and produce the Monolog+Avro based events to it. We'll design new JSONSchema-ed events that represent the same data as the existent Avro one's. We'll then modify the EventBus extension to produce these events.
https://github.com/wikimedia/mediawiki-event-schemas/tree/master/avro/mediawiki
This ticket does not encompass replacing the Hadoop based processing of this data, just producing the new ones. We'll have another ticket for using the new data, and for decommissioning the Avro stuff.