Improve auto-recovery noise log when some bookie down. (#4118)

* Improve auto-recovery noise log when some bookie down.

* Address comment.

(cherry picked from commit 54168b5)

Author: horizonzy

bookkeeper-server/src/main/java/org/apache/bookkeeper/client/RackawareEnsemblePlacementPolicyImpl.java

@@ -467,13 +467,26 @@ public PlacementResult<BookieId> replaceBookie(int ensembleSize, int writeQuorum
         try {
             excludeBookies = addDefaultRackBookiesIfMinNumRacksIsEnforced(excludeBookies);
             excludeBookies.addAll(currentEnsemble);
+
+            Set<Node> ensembleNodes = new HashSet<>();
+            Set<Node> excludeNodes = new HashSet<>();
             BookieNode bn = knownBookies.get(bookieToReplace);
             if (null == bn) {
                 bn = createBookieNode(bookieToReplace);
             }
-
-            Set<Node> ensembleNodes = convertBookiesToNodes(currentEnsemble);
-            Set<Node> excludeNodes = convertBookiesToNodes(excludeBookies);
+            for (BookieId bookieId : currentEnsemble) {
+                if (bookieId.equals(bookieToReplace)) {
+                    continue;
+                }
+                ensembleNodes.add(convertBookieToNode(bookieId));
+            }
+            for (BookieId bookieId : excludeBookies) {
+                if (bookieId.equals(bookieToReplace)) {
+                    excludeNodes.add(bn);
+                    continue;
+                }
+                excludeNodes.add(convertBookieToNode(bookieId));
+            }
 
             excludeNodes.addAll(ensembleNodes);
             excludeNodes.add(bn);