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Kafka

Configure kafka with the following commands

./kafka-topics --create --bootstrap-server localhost:9092  --topic topicA
./kafka-topics --create --bootstrap-server localhost:9092  --topic topicB

./kafka-acls.sh --bootstrap-server=127.0.0.1:9092 --add --allow-principal User:'user_principal'  --operation READ --operation DESCRIBE --topic topicA

Service

Control turning on/off of consumers with properties.

Reproducing steps

  • run kafka and configure accotding to the steps before
  • build service
  • run the first service with the following configuration
turnOnFirstConsumer=false
turnOnSecondConsumer=true
  • run the second service with the following configuration
turnOnFirstConsumer=true
turnOnSecondConsumer=false
  • wait for UnathorizedException in the second service (about 1 minute)
  • check logs in the first service