public void setActiveOperationArn(String activeOperationArn) {
        this.activeOperationArn = activeOperationArn;
    }
<p>
Arn of active cluster operation.
</p>

@param activeOperationArn
       <p>
       Arn of active cluster operation.
       </p>
aws-java-sdk-kafka/src/main/java/com/amazonaws/services/kafka/model/ClusterInfo.java