dajac commented on code in PR #14067:
URL: https://github.com/apache/kafka/pull/14067#discussion_r1274533496
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group-coordinator/src/main/java/org/apache/kafka/coordinator/group/consumer/ConsumerGroup.java:
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@@ -497,6 +499,30 @@ public DeadlineAndEpoch metadataRefreshDeadline() {
return metadataRefreshDeadline;
}
+ /**
+ * Validates the OffsetCommit request.
+ *
+ * @param memberId The member id.
+ * @param groupInstanceId The group instance id.
+ * @param memberEpoch The member epoch.
+ */
+ @Override
+ public void validateOffsetCommit(
+ String memberId,
+ String groupInstanceId,
+ int memberEpoch
+ ) throws UnknownMemberIdException, StaleMemberEpochException {
+ // When the member epoch is -1, the request comes from either the
admin client
+ // or a consumer which does not use the group management facility. In
this case,
+ // the request can commit offsets if the group is empty.
+ if (memberEpoch < 0 && members().isEmpty()) return;
Review Comment:
No. EMPTY is actually set based on this condition:
https://github.com/apache/kafka/blob/trunk/group-coordinator/src/main/java/org/apache/kafka/coordinator/group/consumer/ConsumerGroup.java#L505.
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