Github user srdo commented on a diff in the pull request:
https://github.com/apache/storm/pull/1679#discussion_r79669257
--- Diff:
external/storm-kafka-client/src/main/java/org/apache/storm/kafka/spout/KafkaSpout.java
---
@@ -266,26 +266,32 @@ private void doSeekRetriableTopicPartitions() {
if (offsetAndMeta != null) {
kafkaConsumer.seek(rtp, offsetAndMeta.offset() + 1); //
seek to the next offset that is ready to commit in next commit cycle
} else {
- kafkaConsumer.seekToEnd(toArrayList(rtp)); // Seek to
last committed offset
+ kafkaConsumer.seek(rtp, acked.get(rtp).committedOffset +
1); // Seek to last committed offset
--- End diff --
Another PR is fine, but I don't think there needs to be a big change. If
people are running with auto commit mode on they've already kind of decided
that they don't care about at least once delivery (similar to disabling tuple
acking), so I think simply making the spout ignore failed tuples should be
fine. Alternatively auto commit mode could be removed from KafkaSpoutConfig and
just be an optimization the spout enables if tuple acking is disabled. I don't
think it makes sense to run with tuple acking on and auto commit on, nor does
it really make sense to disable tuple acking and disable auto commit. @hmcl do
you have an opinion on this?
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