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The following fetches a list of topics:
./kafka-topics.sh --bootstrap-server http://lasair-dev.roe.ac.uk:9092 --list
The following fetches all the events in a topic, from the beginning:
./kafka-console-consumer.sh --bootstrap-server http://lasair-dev.roe.ac.uk:9092 --from-beginning --topic 2TNScrossmatch