hangc0276 commented on code in PR #3773:
URL: https://github.com/apache/bookkeeper/pull/3773#discussion_r1111780501
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bookkeeper-server/src/main/java/org/apache/bookkeeper/meta/ZkLedgerUnderreplicationManager.java:
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@@ -557,10 +557,15 @@ private long getLedgerToRereplicateFromHierarchy(String
parent, long depth)
return -1;
}
- Collections.shuffle(children);
+ if (depth == 3) {
+ // Avoid workers want to get the same ledger lock.
+ Collections.shuffle(children);
+ } else {
+ Collections.sort(children);
Review Comment:
It will sort according to the `String` type order instead of the LedgerId
long type order, which can't more sure the sorted list is ordered by ledger
creation time.
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