vamossagar12 commented on code in PR #13801:
URL: https://github.com/apache/kafka/pull/13801#discussion_r1238369128
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connect/runtime/src/main/java/org/apache/kafka/connect/storage/ConnectorOffsetBackingStore.java:
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@@ -279,10 +284,61 @@ public Future<Void> set(Map<ByteBuffer, ByteBuffer>
values, Callback<Void> callb
throw new IllegalStateException("At least one non-null offset
store must be provided");
}
+ boolean containsTombstones = values.containsValue(null);
+
+ // If there are tombstone offsets, then the failure to write to
secondary store will
+ // not be ignored. Also, for tombstone records, we first write to
secondary store and
+ // then to primary stores.
+ if (secondaryStore != null && containsTombstones) {
+ AtomicReference<Throwable> secondaryStoreTombstoneWriteError = new
AtomicReference<>();
+ Future<Void> secondaryWriteFuture = secondaryStore.set(values,
(secondaryWriteError, ignored) -> {
+ try (LoggingContext context = loggingContext()) {
+ if (secondaryWriteError != null) {
+ log.warn("Failed to write offsets with tombstone
records to secondary backing store", secondaryWriteError);
+ secondaryStoreTombstoneWriteError.compareAndSet(null,
secondaryWriteError);
+ } else {
+ log.debug("Successfully flushed tombstone offsets to
secondary backing store");
+ }
+ }
+ });
Review Comment:
I see what you are saying. I think what you mean is that the callback passed
to the `set` method itself can be provided to the `KafkaOffsetBackingStore#set`
method and it will take care of completing it when the `onComplete` of
`SetCallback` is completed. I think that makes sense but the reason I did this
was that I can't return the `Future<Void>` object created when invoking
`KafkaOffsetBackingStore#set` object always because if that operation succeeds
then we also need to write to the primary store. That's why, created this extra
callback which gets executed upon `onComplete` of `SetCallback` and with this I
can selectively return a `FutureCallBack<Void>` object by giving it the
original callback. Let me know if that makes sense?
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