[jira] [Commented] (KAFKA-9914) Mirror Maker 2 creates heartbeats kafka topics recursively

["Al Ricafort (Jira)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/KAFKA-9914?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17397208#comment-17397208 ] 

Al Ricafort commented on KAFKA-9914:
------------------------------------

Hi,

I have the same issue.

I have 2 Kafka setup, A and B. A is a cluster with 3 instances running on the same machine, while B is a stand alone in another machine. I tried to use Mirror Maker to replicate from A to B. The config file is as follows:

 

{{clusters = A, B}}

{{A.bootstrap.servers = host1:9091, host1:9092, host1:9093}}

{{B.bootstrap.servers = host2:9092}}

{{A->B.enabled = true}}

{{B->A.enabled = false}}

{{replication.factor = 1}}

{{checkpoints.topic.replication.factor=1}}

{{heartbeats.topic replication.factor=1}}

{{offset-syncs.topic.replication.factor=1}}

{{offset.storage.replication.factor=1}}

{{status.storage.replication.factor=1}}

{{config.storage.replication.factor=1}}

I execute mirror maker as follows:

 

{{bin/connect-mirror-maker.sh config/mirror.maker.properties}}

But when I run the mirror maker on the ‘B’ side I can see that it keeps creating ‘heartbeats’ topics. So at some point I will end up having so many ‘A.heartbeats’ topic like below. And it will just keep growing until I kill the mirror maker.

 

{{A.A.A.A.heartbeats}}

{{A.A.A.heartbeats}}

{{A.A.heartbeats}}

{{A.heartbeats}}

 

How to go around this issue?

Thanks.

Kafka Version: 2.13-2.8

> Mirror Maker 2 creates heartbeats kafka topics recursively
> ----------------------------------------------------------
>
>                 Key: KAFKA-9914
>                 URL: https://issues.apache.org/jira/browse/KAFKA-9914
>             Project: Kafka
>          Issue Type: Bug
>          Components: mirrormaker
>    Affects Versions: 2.0.0
>            Reporter: azher khan
>            Priority: Major
>
> Hi Team,
> I configured Mirror Maker 2 to run on a Pod configuring the Kafka brokers in our environments marking '10.X.X.YY' Kafka broker as primary and '10.X.Y.XY' as backup.
> +*Mirror Maker mm2.properties*+ 
> {code:java}
> clusters=kafka,backup
> kafka.bootstrap.servers=10.X.X.YY:9092
> backup.bootstrap.servers=10.X.Y.XY:9092
> kafka->backup.enabled=true
> kafka->backup.topics=az.*
> backup->kafka.enabled=false
> sync.topic.acls.enabled=true
> {code}
>  
> I was able to run Mirror Maker 2 successfully and was also able to take backup of the identified topics (starting with 'az').
>  
> However I could see many kafka topics with the suffix 'heartbeats' created in recursion (See below the list of topics with 'kafka.*.heartbeats'). This could be because i triggered the 'connect-mirror-maker.sh' several times to test backing up other topics
>  
> I have 2 queries
>  # How to avoid having 'kafka.*.heartbeats' topic being created using Mirror Maker 2
>  # Once Mirror Maker 2 has backed up a topic say 'azherf1test' . What is the best way to rollback changes made by Mirror Maker (ie delete all the topics created by Mirror Maker 'kafka.azherf1test' and supporting topics) ensuring the stability of existing/source topics and Kafka broker.
> We are testing Mirror Maker and want to ensure we are able to roll back the changes without affecting the Kafka topics/brokers)
> +*Kafka Topics list output:*+
> {code:java}
> azherf1test
> heartbeats
> kafka-client-topic
> mm2-configs.backup.internal
> mm2-configs.kafka.internal
> mm2-offset-syncs.backup.internal
> mm2-offsets.backup.internal
> mm2-offsets.kafka.internal
> mm2-status.backup.internal
> mm2-status.kafka.internal
> kafka.azherf1test
> kafka.checkpoints.internal
> kafka.heartbeats
> kafka.kafka.heartbeats
> kafka.kafka.kafka.heartbeats
> kafka.kafka.kafka.kafka.heartbeats
> kafka.kafka.kafka.kafka.kafka.heartbeats
> kafka.kafka.kafka.kafka.kafka.kafka.heartbeats
> kafka.kafka.kafka.kafka.kafka.kafka.kafka.heartbeats
> kafka.kafka.kafka.kafka.kafka.kafka.kafka.kafka.heartbeats
> kafka.kafka.kafka.kafka.kafka.kafka.kafka.kafka.kafka.heartbeats
> kafka.kafka.kafka.kafka.kafka.kafka.kafka.kafka.kafka.kafka.heartbeats
> kafka.kafka.kafka.kafka.kafka.kafka.kafka.kafka.kafka.kafka.kafka.heartbeats
> kafka.kafka.kafka.kafka.kafka.kafka.kafka.kafka.kafka.kafka.kafka.kafka.heartbeats
> kafka.kafka.kafka.kafka.kafka.kafka.kafka.kafka.kafka.kafka.kafka.kafka.kafka.heartbeats
> kafka.kafka.kafka.kafka.kafka.kafka.kafka.kafka.kafka.kafka.kafka.kafka.kafka.kafka.heartbeats
> kafka.kafka.kafka.kafka.kafka.kafka.kafka.kafka.kafka.kafka.kafka.kafka.kafka.kafka.kafka.heartbeats
> kafka.kafka.kafka.kafka.kafka.kafka.kafka.kafka.kafka.kafka.kafka.kafka.kafka.kafka.kafka.kafka.heartbeats
> kafka.kafka.kafka.kafka.kafka.kafka.kafka.kafka.kafka.kafka.kafka.kafka.kafka.kafka.kafka.kafka.kafka.heartbeats
> kafka.kafka.kafka.kafka.kafka.kafka.kafka.kafka.kafka.kafka.kafka.kafka.kafka.kafka.kafka.kafka.kafka.kafka.heartbeats
> kafka.kafka.kafka.kafka.kafka.kafka.kafka.kafka.kafka.kafka.kafka.kafka.kafka.kafka.kafka.kafka.kafka.kafka.kafka.heartbeats
> kafka.kafka.kafka.kafka.kafka.kafka.kafka.kafka.kafka.kafka.kafka.kafka.kafka.kafka.kafka.kafka.kafka.kafka.kafka.kafka.heartbeats
> kafka.kafka.kafka.kafka.kafka.kafka.kafka.kafka.kafka.kafka.kafka.kafka.kafka.kafka.kafka.kafka.kafka.kafka.kafka.kafka.kafka.heartbeats
> kafka.kafka.kafka.kafka.kafka.kafka.kafka.kafka.kafka.kafka.kafka.kafka.kafka.kafka.kafka.kafka.kafka.kafka.kafka.kafka.kafka.kafka.heartbeats
> kafka.kafka.kafka.kafka.kafka.kafka.kafka.kafka.kafka.kafka.kafka.kafka.kafka.kafka.kafka.kafka.kafka.kafka.kafka.kafka.kafka.kafka.kafka.heartbeats
> kafka.kafka.kafka.kafka.kafka.kafka.kafka.kafka.kafka.kafka.kafka.kafka.kafka.kafka.kafka.kafka.kafka.kafka.kafka.kafka.kafka.kafka.kafka.kafka.heartbeats
> kafka.kafka.kafka.kafka.kafka.kafka.kafka.kafka.kafka.kafka.kafka.kafka.kafka.kafka.kafka.kafka.kafka.kafka.kafka.kafka.kafka.kafka.kafka.kafka.kafka.heartbeats
> kafka.kafka.kafka.kafka.kafka.kafka.kafka.kafka.kafka.kafka.kafka.kafka.kafka.kafka.kafka.kafka.kafka.kafka.kafka.kafka.kafka.kafka.kafka.kafka.kafka.kafka.heartbeats{code}
>  



--
This message was sent by Atlassian Jira
(v8.3.4#803005)