desaikomal commented on code in PR #2514:
URL: https://github.com/apache/helix/pull/2514#discussion_r1213736645
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helix-core/src/main/java/org/apache/helix/controller/stages/TopStateHandoffReportStage.java:
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@@ -218,6 +217,8 @@ private void
reportTopStateExistence(ResourceControllerDataProvider cache, Curre
// we observed an entire top state handoff process
reportSingleTopStateHandoff(cache, lastTopStateInstance,
currentTopStateInstance,
Review Comment:
i can do that optimization but i had concern with this code:
// Make sure last top state instance has not bounced during cluster data
cache refresh
if (cache.getLiveInstances().containsKey(lastTopStateInstance)) {
String lastTopStateSession =
cache.getLiveInstances().get(lastTopStateInstance).getEphemeralOwner();
// We need this null check as there are test cases creating incomplete
current state
if (cache.getCurrentState(lastTopStateInstance,
lastTopStateSession).get(resourceName)
!= null) {
startTime =
cache.getCurrentState(lastTopStateInstance,
lastTopStateSession).get(resourceName)
.getStartTime(partition.getPartitionName());
fromTopStateUserLatency =
cache.getCurrentState(lastTopStateInstance,
lastTopStateSession).get(resourceName)
.getEndTime(partition.getPartitionName()) - startTime;
}
}
So i wanted to first make sure change works properly and then optimize it
but code de-dup. i can combine the two into one change.
let me know what you would prefer. i prefer the current approach but i am
ready to hear reviewers choice too.
thanks,
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