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Kafka Broker Not Available on 127.0.0.1

The Big Data in Real World team expands beyond localhost:

You might encounter the below error message when your Kafka consumers or clients connect to Kafka broker for ingestion or consumption.

Connection to node -1 (/127.0.0.1:9092) could not be established. Broker may not be available.

Read on to see what the problem is and how you can fix it.

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