AnonHxy opened a new pull request, #18416:
URL: https://github.com/apache/pulsar/pull/18416
### Motivation
If we call `ledger.openCursor("xxx", null)`, setting the 2nd paramters
`initialPosition` as null, it will open a cursor whoes markDeleted position is
the earliest position, but the expected result is the lastest position.
The root cause is that the Line986 and Line993 are contrary
https://github.com/apache/pulsar/blob/79a97a9a33cfa00d8d6326603032008f4346e5b4/managed-ledger/src/main/java/org/apache/bookkeeper/mledger/impl/ManagedLedgerImpl.java#L984-L997
### Modifications
<!-- Describe the modifications you've done. -->
### Verifying this change
- [x] Make sure that the change passes the CI checks.
- Adding test
`org.apache.bookkeeper.mledger.impl.ManagedCursorTest#testOpenCursorWithNullInitialPosition`
### Documentation
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- [ ] `doc-required` <!-- Your PR changes impact docs and you will update
later -->
- [x] `doc-not-needed` <!-- Your PR changes do not impact docs -->
- [ ] `doc-complete` <!-- Docs have been already added -->
### Matching PR in forked repository
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