Jason Gustafson created KAFKA-7335:
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Summary: Store clusterId locally to ensure broker joins the right
cluster
Key: KAFKA-7335
URL: https://issues.apache.org/jira/browse/KAFKA-7335
Project: Kafka
Issue Type: Improvement
Reporter: Jason Gustafson
We have seen situations where a broker somehow got the wrong configuration and
joined a different cluster than the one it was previously registered in. This
can create various kinds of metadata inconsistencies in the cluster and can be
difficult to debug. It was suggested in
[KIP-78|https://cwiki.apache.org/confluence/display/KAFKA/KIP-78%3A+Cluster+Id]
that we could store the clusterId locally after initial registration and verify
upon startup that the locally stored value matches what is in zookeeper.
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