19.8. Stopping a cluster rebalance
Once started, a cluster rebalance operation might take some time to complete and affect the overall performance of the Kafka cluster.
If you want to stop a cluster rebalance operation that is in progress, apply the stop annotation to the KafkaRebalance custom resource. This instructs Cruise Control to finish the current batch of partition reassignments and then stop the rebalance. When the rebalance has stopped, completed partition reassignments have already been applied; therefore, the state of the Kafka cluster is different when compared to prior to the start of the rebalance operation. If further rebalancing is required, you should generate a new optimization proposal.
The performance of the Kafka cluster in the intermediate (stopped) state might be worse than in the initial state.
Prerequisites
-
You have approved the optimization proposal by annotating the
KafkaRebalancecustom resource withapprove. -
The status of the
KafkaRebalancecustom resource isRebalancing.
Procedure
Annotate the
KafkaRebalanceresource in OpenShift:oc annotate kafkarebalance rebalance-cr-name strimzi.io/rebalance="stop"Check the status of the
KafkaRebalanceresource:oc describe kafkarebalance rebalance-cr-name-
Wait until the status changes to
Stopped.
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