dongnuo123 commented on code in PR #15268:
URL: https://github.com/apache/kafka/pull/15268#discussion_r1467804300
##########
group-coordinator/src/main/java/org/apache/kafka/coordinator/group/GroupMetadataManager.java:
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@@ -3467,6 +3476,358 @@ public void maybeDeleteGroup(String groupId,
List<Record> records) {
}
}
+ private JoinGroupRequestProtocol throwIfProtocolUnmatched(
+ ConsumerGroupMember member,
+ JoinGroupRequestData.JoinGroupRequestProtocolCollection protocols
+ ) {
+ for (JoinGroupRequestData.JoinGroupRequestProtocol protocol :
protocols) {
+ final ByteBuffer buffer = ByteBuffer.wrap(protocol.metadata());
+ ConsumerProtocol.deserializeVersion(buffer);
+ final Optional<Integer> generationId =
ConsumerProtocol.deserializeSubscription(buffer, (short) 0).generationId();
+
+ // If the generation id is provided, it must match the member
epoch.
+ if (!generationId.isPresent() || generationId.get() ==
member.memberEpoch()) {
+ // TODO: need a list of all available server assignors
+ if
(UniformAssignor.UNIFORM_ASSIGNOR_NAME.equals(protocol.name())
+ ||
RangeAssignor.RANGE_ASSIGNOR_NAME.equals(protocol.name())) {
+ return protocol;
+ }
+ }
+ }
+ throw new FencedMemberEpochException("The JoinGroup request doesn't
have a matched generation id from a " +
+ "protocol supported by the server assignors with the epoch of the
member known by the group coordinator (" +
+ member.memberEpoch() + ").");
Review Comment:
not supported by the old protocol
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