zhaohaidao commented on code in PR #14271:
URL: https://github.com/apache/kafka/pull/14271#discussion_r1324884926
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group-coordinator/src/test/java/org/apache/kafka/coordinator/group/GroupMetadataManagerTest.java:
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@@ -431,14 +434,17 @@ public void rollback() {
snapshotRegistry.revertToSnapshot(lastCommittedOffset);
}
+ public void getOrCreateSnapshot() {
+ snapshotRegistry.getOrCreateSnapshot(lastCommittedOffset);
+ }
Review Comment:
This will cause testListGroups to fail because
groupMetadataManager.listGroups always uses lastCommittedOffset to query.
Putting getOrCreateSnapshot(lastWrittenOffset) at the beginning of the replay
function will lead to the following result: the largest epoch in the snapshot
is always 1 less than lastCommittedOffset. In this way, listGroups cannot find
the expected results.
Putting getOrCreateSnapshot(lastWrittenOffset) at the end of the function,
especially after lastWrittenOffset+1, all cases can pass, which is consistent
with the semantics of CoordinatorRuntime, that is, always update the memory
first, then update lastWrittenOffset, and use the latest lastWrittenOffset to
update snapshot.
WDYT?
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