kevin-wu24 commented on code in PR #22191:
URL: https://github.com/apache/kafka/pull/22191#discussion_r3685131403
##########
metadata/src/main/java/org/apache/kafka/controller/QuorumController.java:
##########
@@ -2153,6 +2157,21 @@ public CompletableFuture<Void> registerController(
EnumSet.noneOf(ControllerOperationFlag.class));
}
+ @Override
+ public CompletableFuture<Void> unregisterController(
+ ControllerRequestContext context,
+ int controllerId
+ ) {
+ return appendWriteEvent("unregisterController", context.deadlineNs(),
+ () -> {
+ if (nodeId == controllerId) {
+ throw new InvalidRequestException("Controller cannot
unregister itself while it is active.");
+ }
+ return clusterControl.unregisterController(controllerId);
Review Comment:
`Run kafka-cluster unregister-controller` would be step 3. Stopping the
voter and removing it from all `controller.quorum.voters` configs can be done
interchangeably I believe.
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