Kafka Elasticsearch Connector Tutorial with Examples

This post details the setup and configuration of the Elasticsearch Sink Connector for Kafka Connect, including how to transfer JSON data from Kafka topics to Elasticsearch. It addresses common issues like serialization errors due to incorrect converter configurations (Avro vs. JSON) and demonstrates how to update connector configurations using the REST API. The post also explores the use of Single Message Transforms (SMTs) like RegexRouter and TimestampRouter for modifying index names and handling message keys and schemas.