Github user hmcl commented on a diff in the pull request:
https://github.com/apache/storm/pull/1679#discussion_r79794331
--- Diff:
external/storm-kafka-client/src/main/java/org/apache/storm/kafka/spout/KafkaSpout.java
---
@@ -479,16 +482,17 @@ public OffsetAndMetadata findNextCommitOffset() {
KafkaSpoutMessageId nextCommitMsg = null; // this is a
convenience variable to make it faster to create OffsetAndMetadata
for (KafkaSpoutMessageId currAckedMsg : ackedMsgs) { //
complexity is that of a linear scan on a TreeMap
- if ((currOffset = currAckedMsg.offset()) ==
initialFetchOffset || currOffset == nextCommitOffset + 1) { // found
the next offset to commit
+ if ((currOffset = currAckedMsg.offset()) ==
nextCommitOffset + 1) { // found the next offset to commit
--- End diff --
@srdo from what I recall, in scenarios where topic had no messages at all,
this was necessary. I tuned some of these changes based on several integration
tests I ran under several scenarios. As I mentioned in a prior comment, I have
been in touch with people that are running this in production without any
issues. You are proposing quite a few algorithmic changes. Are these changes
caused by bugs ? Do you have test scenarios that guarantee that the proposed
changes are not adding new bugs ? Or are these changes proposed by code
analysis that leads you to believe that they are not necessary ?
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