nodece commented on code in PR #22344:
URL: https://github.com/apache/pulsar/pull/22344#discussion_r1538509430


##########
managed-ledger/src/test/java/org/apache/bookkeeper/mledger/impl/ManagedLedgerTest.java:
##########
@@ -2642,10 +2642,10 @@ public void testGetNumberOfEntriesInStorage() throws 
Exception {
             managedLedger.addEntry(("entry-" + i).getBytes(Encoding));
         }
 
-        //trigger ledger rollover and wait for the new ledger created
-        Field stateUpdater = ManagedLedgerImpl.class.getDeclaredField("state");
-        stateUpdater.setAccessible(true);
-        stateUpdater.set(managedLedger, ManagedLedgerImpl.State.LedgerOpened);
+        // trigger ledger rollover and wait for the new ledger created
+        Awaitility.await().untilAsserted(() -> {
+           assertEquals("LedgerOpened", 
WhiteboxImpl.getInternalState(managedLedger, "state").toString());

Review Comment:
   ```suggestion
              assertEquals(managedLedger.getState(), State.LedgerOpened);
   ```
   
   WhiteboxImpl.getInternalState is not a good way. When this variable name is 
changed, it is easy to miss this point.
   
   I prefer to call the method, you can also add the `@VisibleForTesting` to 
the test method.



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