snehashisp commented on code in PR #12784:
URL: https://github.com/apache/kafka/pull/12784#discussion_r1006427140
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connect/runtime/src/main/java/org/apache/kafka/connect/runtime/ExactlyOnceWorkerSourceTask.java:
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@@ -280,15 +282,16 @@ private void commitTransaction() {
// Commit the transaction
// Blocks until all outstanding records have been sent and ack'd
- try {
- producer.commitTransaction();
- } catch (Throwable t) {
- log.error("{} Failed to commit producer transaction",
ExactlyOnceWorkerSourceTask.this, t);
- flushError.compareAndSet(null, t);
+ if (flushFuture != null) {
Review Comment:
This might mean that we never end up doing a commit if there are no offsets
to commit, for example if the connector never returns any offsets. There might
still be SourceRecords to send. Not sure if any connector does this, but we
should not ignore this edge case regardless.
Maybe we can simply check if flushError is set instead. The callback should
be invoked and the error set immediately in case of a serialisation failure.
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