[jira] [Created] (KAFKA-7629) Mirror maker goes into infinite loop

["Darshan Mehta (JIRA)" <ji...@apache.org>]

Darshan Mehta created KAFKA-7629:
------------------------------------

             Summary: Mirror maker goes into infinite loop
                 Key: KAFKA-7629
                 URL: https://issues.apache.org/jira/browse/KAFKA-7629
             Project: Kafka
          Issue Type: Bug
          Components: mirrormaker
    Affects Versions: 2.0.0
         Environment: local
            Reporter: Darshan Mehta


*Setup:*

I have 2 kafka images running (Spoify Kafka image : [https://hub.docker.com/r/spotify/kafka/)]

Config:

Image 1:
 * host: kafka1
 * zk port : 2181
 * broker port : 9092

Image 2:
 * host: kafka2
 * zk port : 1181
 * broker port : 8092

Producer Properties for Mirror maker:

 
{code:java}
bootstrap.servers=kafka2:8092
{code}
Consumer Properties for Mirror maker:

 

 
{code:java}
bootstrap.servers=kafka1:9092
group.id=test-consumer-group
exclude.internal.topics=true
{code}
 

*Steps to replicate :*
 # Start mirror maker with following command : 
{code:java}
$KAFKA_INSTALLATION_DIR/bin/kafka-mirror-maker.sh --producer.config <producer_config_location> --consumer.config <consumer_config_location> --num.streams 1 --whitelist topic-1
{code}

 # Start local kafka console consumer to listen to topic-1 for kafka2:8092 
{code:java}
$KAFKA_INSTALLATION_DIR/bin/kafka-console-consumer.sh --bootstrap-server kafka2:8092 --topic topic-1
{code}

 # Produce an event to kafka1:9092 - topic-1  -> It will be printed on the console in Step 2
 # Stop mirror maker with ctrl+C (started in step 1)
 # Restart mirror maker with same command
 # Produce an event onto the same topic (i.e. repeat step 3)
 # Both source and destination will be flooded with the same messages until mirror maker is stopped

Surprisingly, source kafka also gets flooded with the same message. I believe when restarted, the mirror maker is unable to read the state?



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