Update error log in RemoteManagedCursorImpl

Author: Jiang Haiting

managed-ledger/src/main/java/org/apache/bookkeeper/mledger/impl/RemoteManagedCursorImpl.java

@@ -73,7 +73,9 @@ void initialize(PositionImpl position, Map<String, Long> properties, VoidCallbac
             recoverFromCursorPosition(pos);
             callback.operationComplete();
         }).exceptionally(throwable -> {
-            callback.operationFailed(ManagedLedgerException.getManagedLedgerException(throwable));
+            String errMsg = String.format("[%s] initialize cursor %s failed.", ledger.getName(), name);
+            log.error(errMsg, throwable);
+            callback.operationFailed(new ManagedLedgerException(errMsg, throwable));
             return null;
         });
     }
@@ -111,8 +113,9 @@ void recover(VoidCallback callback) {
             recoverFromCursorPosition(positionInfo);
             callback.operationComplete();
         }).exceptionally(throwable -> {
-            //TODO opt define this exception.
-            callback.operationFailed(new ManagedLedgerException(throwable));
+            String errMsg = String.format("[%s] recover existing cursor %s failed", ledger.getName(), name);
+            log.error(errMsg, throwable);
+            callback.operationFailed(new ManagedLedgerException(errMsg, throwable));
             return null;
         });
     }
@@ -174,8 +177,7 @@ protected void persistPosition(MarkDeleteEntry mdEntry, VoidCallback callback) {
                 .thenRun(callback::operationComplete)
                 .exceptionally(throwable -> {
                     callback.operationFailed(
-                            new ManagedLedgerException("Persist position to remote writer broker failed.",
-                                    throwable));
+                            new ManagedLedgerException("Persist position to remote writer broker failed.", throwable));
                     return null;
                 });
     }