rondagostino commented on code in PR #13780:
URL: https://github.com/apache/kafka/pull/13780#discussion_r1212043034
##########
metadata/src/main/java/org/apache/kafka/controller/PartitionChangeBuilder.java:
##########
@@ -220,13 +220,24 @@ private boolean isValidNewLeader(int replica) {
private void tryElection(PartitionChangeRecord record) {
ElectionResult electionResult = electLeader();
if (electionResult.node != partition.leader) {
- log.debug(
- "Setting new leader for topicId {}, partition {} to {} using
{} election",
- topicId,
- partitionId,
- electionResult.node,
- electionResult.unclean ? "an unclean" : "a clean"
- );
+ // generating log messages for partition elections can get
expensive on large clusters,
+ // so only log clean elections at TRACE level;
+ // log unclean elections at WARN level since doing so can lead to
data loss.
+ if (electionResult.unclean) {
+ log.warn(
Review Comment:
Sure, sounds good. Will adjust.
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