lhotari commented on code in PR #25101:
URL: https://github.com/apache/pulsar/pull/25101#discussion_r2639594830


##########
managed-ledger/src/main/java/org/apache/bookkeeper/mledger/impl/ManagedLedgerImpl.java:
##########
@@ -2713,26 +2713,29 @@ public void 
maybeUpdateCursorBeforeTrimmingConsumedLedger() {
         for (ManagedCursor cursor : cursors) {
             Position lastAckedPosition = 
cursor.getPersistentMarkDeletedPosition() != null
                     ? cursor.getPersistentMarkDeletedPosition() : 
cursor.getMarkDeletedPosition();
-            LedgerInfo currPointedLedger = 
ledgers.get(lastAckedPosition.getLedgerId());
+            LedgerInfo curPointedLedger = 
ledgers.get(lastAckedPosition.getLedgerId());
             LedgerInfo nextPointedLedger = 
Optional.ofNullable(ledgers.higherEntry(lastAckedPosition.getLedgerId()))
                     .map(Map.Entry::getValue).orElse(null);
 
-            if (currPointedLedger != null) {
+            if (curPointedLedger != null) {
                 if (nextPointedLedger != null) {
                     if (lastAckedPosition.getEntryId() != -1
-                            && lastAckedPosition.getEntryId() + 1 >= 
currPointedLedger.getEntries()) {
+                            && lastAckedPosition.getEntryId() + 1 >= 
curPointedLedger.getEntries()) {
                         lastAckedPosition = 
PositionFactory.create(nextPointedLedger.getLedgerId(), -1);
                     }
                 } else {
                     log.debug("No need to reset cursor: {}, current ledger is 
the last ledger.", cursor);
                 }
             } else {
+                // TODO no ledger exists, should we move cursor mark deleted 
position to nextPointedLedger:-1 ?
                 log.warn("Cursor: {} does not exist in the managed-ledger.", 
cursor);
             }
 
-            if (!lastAckedPosition.equals(cursor.getMarkDeletedPosition())) {
+            if (lastAckedPosition.compareTo(cursor.getMarkDeletedPosition()) > 
0) {

Review Comment:
   The remaining 
`org.apache.bookkeeper.mledger.ManagedLedgerException$BadVersionException` 
issue might be a production code bug. There's a race condition that should be 
prevented or handled by retrying.



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