philipnee commented on code in PR #14357:
URL: https://github.com/apache/kafka/pull/14357#discussion_r1332509183
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clients/src/main/java/org/apache/kafka/clients/consumer/internals/MembershipManagerImpl.java:
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@@ -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);
+ remainingAssignmentTime.update();
+
+ if (result == ReconciliationResult.COMPLETED) {
+ // If we've revoked one or more partitions, we need to send an
acknowledgement request ASAP to
Review Comment:
I'm having a bit of dilemma of how to correct handling the heartbeat timer
reset here - now, we could have this and the heartbeat request manager to hold
on to each other, and invokes "onAssignmentRevocation" to expire the heartbeat
timer and ensure the next poll will have the heartbeat sent out.
Another way to do it, which could be better, is to have the heartbeat check
on a state here to determine if a heartbeat needs to be sent out immediately.
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