| Note |
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“Finishing cluster replication” log message only confirms that data loss does not occur. There are still background replication related tasks running. Please wait for these tasks to finish before continuing the rolling upgrade process. The individual brokers may still be observing I/O and CPU load stemming from the replication process. In order to ensure the cluster has reached its baseline load with the traffic it is experiencing, Please check the metrics in Replication task metrics Observing these metrics in addition to the mentioned log line can be helpful when performing rolling upgrades in clusters that are operating close to the limits of their hardware’s capabilities. |
Context
While doing a rolling upgrade, you would notice the following messages in the logs
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