What this project needs to run:

1. Kafka on localhost:9092
2. MySQL on localhost:3306

Quick environment config with docker

For more easy setup you can use the docker-compose.yml file in this project and just run:

docker-compose up

This will start:

• kafka on port 9092, 9093
• kafka-ui on port 9999
• mysql on port 3306 (username: root & password: root)

How to reproduce the issue:

1. Start the project
2. Hit this endpoint many times (>10). Doesn't need to be asynchronous.

'http://localhost:8080/test' 

OR

curl -X 'GET' \
  'http://localhost:8080/test' \
  -H 'accept: */*'

• Expected result: is no records to be found in DB and Kafka. Everything should be rollback.
• Actual result: there are some messages in kafka.