desaikomal commented on code in PR #2553:
URL: https://github.com/apache/helix/pull/2553#discussion_r1260289729
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helix-core/src/main/java/org/apache/helix/controller/stages/TopStateHandoffReportStage.java:
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@@ -469,16 +475,17 @@ private void
reportTopStateComesBack(ResourceControllerDataProvider cache, Map<S
}
}
+ long duration = handOffEndTime - handOffStartTime;
+ long helixLatency = duration - fromTopStateUserLatency -
toTopStateUserLatency;
+ // It is possible that during controller leader switch, we lost previous
master information
+ // and use current time to approximate missing top state start time. If we
see the actual
+ // user latency is larger than the duration we estimated, we use user
latency to start with
+ duration = Math.max(duration, helixLatency);
+ boolean isGraceful = record.isGracefulHandoff();
+ logMissingTopStateInfo(duration, helixLatency, isGraceful,
partition.getPartitionName());
Review Comment:
the if condition below says: ( handOffEndTime - handOffStartTime <=
threshold )
- which is not our customer ask, so why are we moving the message
unconditionally? if it is for improving debuggability, then it will flood as
it will log for everything which is missing top state and especially when
instance goes down, it will definately cause lot more messages.
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