sijie commented on a change in pull request #1121: [Merge Yahoo repo]: 
AsyncReadLastEntry should trigger callback with error when ledger is empty
URL: https://github.com/apache/bookkeeper/pull/1121#discussion_r167386297
 
 

 ##########
 File path: 
bookkeeper-server/src/test/java/org/apache/bookkeeper/client/TestReadLastEntryAsync.java
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 @@ -0,0 +1,62 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.apache.bookkeeper.client;
+
+import static org.junit.Assert.assertEquals;
+
+import java.util.Enumeration;
+import java.util.concurrent.CountDownLatch;
+import org.apache.bookkeeper.client.AsyncCallback.ReadCallback;
+import org.apache.bookkeeper.client.BookKeeper.DigestType;
+import org.apache.bookkeeper.test.BookKeeperClusterTestCase;
+import org.junit.Test;
+
+/**
+  * Test read next entry and the latest last add confirmed.
+  */
+public class TestReadLastEntryAsync extends BookKeeperClusterTestCase {
+
+    final DigestType digestType;
+
+    public TestReadLastEntryAsync() {
+        super(3);
 
 Review comment:
   I would reduce this to 1. because we don't actually need 3 bookies for 
testing this feature.

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