lianetm commented on code in PR #14357:
URL: https://github.com/apache/kafka/pull/14357#discussion_r1333166590
##########
clients/src/main/java/org/apache/kafka/clients/consumer/internals/MembershipManagerImpl.java:
##########
@@ -237,4 +253,64 @@ public void
updateAssignment(ConsumerGroupHeartbeatResponseData.Assignment assig
}
maybeTransitionToStable();
}
+
+ /**
+ * Performs the reconciliation between the current topic assignment and
the {@link Assignment} provided in the
+ * heartbeat response. Per the KIP-848 protocol, we perform the following:
+ *
+ * <ol>
+ * <li>Revoke partitions, if any</li>
+ * <li>Heartbeat to acknowledge revoked partitions</li>
+ * <li>Assign partitions, if any</li>
+ * <li>Heartbeat to acknowledge assigned partitions</li>
+ * </ol>
+ *
+ * TODO: What are the the state changes here?
+ * TODO: Is SubscriptionState sufficient to build the next heartbeat
request?
+ * TODO: Where do we need to call
ConsumerRebalanceListener.onPartitionsLost()?
+ */
+ void reconcile() {
+ transitionTo(MemberState.RECONCILING);
+
+ Timer remainingAssignmentTime = time.timer(10000);
+
+ // First, we need to determine if any partitions need to be revoked.
+ {
+ ReconciliationResult result = reconciler.revoke(targetAssignment,
remainingAssignmentTime);
Review Comment:
I was expecting it was going to be the heartbeat manager the one calling
this kind of logic . The state machine shouldn't be involved in anything other
than keeping member info and state, and it already transitions to RECONCILE the
moment the heartbeat req manager calls the `updateState` with a successful
heartbeat response.
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