This helper method will only be called internally by the `RollupEventSerializer` and RTE is being caught in this block https://github.com/chinmay-gupte/blueflood/blob/make_serializer_generic/blueflood-kafka/src/main/java/com/rackspacecloud/blueflood/outputs/serializers/RollupEventSerializer.java#L62. I am not 100% positive about throwing an IOException here. We don't do any I/O ourself. We just generate a byte stream and Kafka client handles the I/O for us. So just serializing rollup object to bytes, doesn't count as I/O. Right?