horizonzy commented on code in PR #3917:
URL: https://github.com/apache/bookkeeper/pull/3917#discussion_r1167971853
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bookkeeper-server/src/main/java/org/apache/bookkeeper/client/LedgerFragment.java:
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@@ -53,8 +53,13 @@ public LedgerFragment(LedgerHandle lh,
this.schedule = lh.getDistributionSchedule();
SortedMap<Long, ? extends List<BookieId>> ensembles = lh
.getLedgerMetadata().getAllEnsembles();
+ // Check if the ledger fragment is closed has two conditions
+ // 1. The ledger is closed
+ // 2. This fragment is not the last fragment and this ledger's
lastAddConfirm >= ensembles.lastKey() - 1.
+ // This case happens when the ledger's last ensemble is empty
this.isLedgerClosed = lh.getLedgerMetadata().isClosed()
- || !ensemble.equals(ensembles.get(ensembles.lastKey()));
+ || (!ensemble.equals(ensembles.get(ensembles.lastKey()))
+ && lh.getLastAddConfirmed() >= ensembles.lastKey() - 1);
Review Comment:
Here should be `lh.getLastAddConfirmed() == ensembles.lastKey() - 2.
The lac maybe 100. The last ensemble key maybe 10.
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