topics created but data not replicated

[smolina74]

Hi,
I've noticed that commenting readinessProbe and livenessProbe sections data is not replicated, although topics are created (by the way, for my experiment I always delete that mm2-offset-syncs..internal topic on the source side).

this is my yaml:

apiVersion: kafka.strimzi.io/v1beta2
kind: KafkaMirrorMaker2
metadata:
  name: backup
spec:
  clusters:
  - alias: source
    bootstrapServers: lens-cluster-molina-kafka-bootstrap.molina:9092
  - alias: backup-target
    bootstrapServers: lens-cluster-santiago3-kafka-bootstrap:9092
  connectCluster: backup-target
  # livenessProbe:
  #   initialDelaySeconds: 25
  #   timeoutSeconds: 25
  logging:
    loggers:
      connect.root.logger.level: INFO
    type: inline
  mirrors:
  - checkpointConnector:
      config:
        replication.policy.class: io.strimzi.kafka.connect.mirror.IdentityReplicationPolicy
        replication.policy.separator: ''
    groupsPattern: .*
    sourceCluster: source
    sourceConnector:
      config:
        replication.policy.class: io.strimzi.kafka.connect.mirror.IdentityReplicationPolicy
        replication.policy.separator: ''
        sync.topic.acls.enabled: 'false'
    targetCluster: backup-target
    topicsPattern: .*
  # readinessProbe:
  #   initialDelaySeconds: 25
  #   timeoutSeconds: 25
  version: 2.7.0

Now, if I uncomment that mirroring works.

Should I have some special consideration for these settings?

[scholzj]

When it is commented out, the default values are used. For MM2 the default is IIRC initial delay is 60 seconds and timeout is 5 seconds. I can see how changing these might affect the pod being restarted for example because you increased the timeout. But I do not see how that would affect any mirroring functionality itself.

[smolina74]

I don't understand that either. In my experiment 3 instances of MM2 pods are created, now if I try it with only one replica, also with those lines commented, the mirroring works.