How can I replicate connect-config, connect-offsets, connect-status topics using Mirror Maker 2 from prod kafka to backup?

I have 2 clusters of kafka, one prod, the second cluster is exactly empty. I need to organize this cluster. I am using Mirror Maker 2, which I run through the strimzi operator. My config looks like this. With this configuration, I get to back up the topics jdbc_source_ums_user, _schemas. Could you help me?

apiVersion: kafka.strimzi.io/v1alpha1
kind: KafkaMirrorMaker2
metadata:
  name: my-mirror-maker2
spec:
  version: 2.5.0
  connectCluster: "backup-kafka-target"
  replicas: 1
  clusters:
  - alias: "prod-kafka-source"
    bootstrapServers: prod1:9092,prod2:9092,prod3:9092
  - alias: "backup-kafka-target"
    bootstrapServers: backup:9092
  mirrors:
  - sourceCluster: "prod-kafka-source"
    targetCluster: "backup-kafka-target"
    sourceConnector:
      tasksMax: 5
      config:
        replication.factor: 3
        offset-syncs.topic.replication.factor: 3
        sync.topic.acls.enabled: "false"
        sync.topic.configs.enabled: "true"
    heartbeatConnector:
      config:
        heartbeats.topic.replication.factor: 3
    checkpointConnector:
      config:
        checkpoints.topic.replication.factor: 3
    topics: "__test1-connect-config,__test1-connect-offsets,__test1-connect-status,__test2-connect-config,__test2-connect-offsets,__test2-connect-status,jdbc_source_ums_user,_schemas"
    topicsBlacklistPattern: .*[\-\.]internal, .*\.replica
    groupsBlacklistPattern: console-consumer-.*, connect-.*
    groups: ".*" 

[scholzj]

I don’t really know. I’m not sure why they should have a special treatment. I think it might be worth if you try if it would work fine without the __. Maybe you need to escape them or enable the __ topics somewhere.

@ajborley Any idea what the problem might be?

[IlyaNakhaichuk]

But when configuring KafkaMirrorMaker2, there are topicsBlacklistPattern and groupsBlacklistPattern fields, where I could just exclude internal topics in case I didn’t need to replicate them, and in fact, this field does not work for internal topics. But thanks for the help, I tried to rebuild the class indicated by ajborley and replication worked for me, but not through strimzi, but the command line.