showuon commented on code in PR #12748:
URL: https://github.com/apache/kafka/pull/12748#discussion_r1034452624
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clients/src/main/java/org/apache/kafka/clients/consumer/StickyAssignor.java:
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@@ -216,6 +216,8 @@ public ByteBuffer subscriptionUserData(Set<String> topics) {
@Override
protected MemberData memberData(Subscription subscription) {
+ // Always deserialize ownedPartitions and generation id from user data
+ // since StickyAssignor is an eager rebalance protocol that will
revoke all existing partitions before joining group
Review Comment:
In StickyAssignor, we still deserialize the user data to retrieve all the
data since it is an eager rebalance protocol.
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