HDFS-1779. Missed adding the test in previous commit.

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/branches/branch-0.20-security@1167334 13f79535-47bb-0310-9956-ffa450edef68

src/test/org/apache/hadoop/hdfs/server/namenode/TestBBWBlockReport.java

@@ -0,0 +1,118 @@
+/**
+ * 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.hadoop.hdfs.server.namenode;
+
+import static org.junit.Assert.assertEquals;
+
+import java.io.ByteArrayOutputStream;
+import java.io.IOException;
+
+import org.apache.hadoop.conf.Configuration;
+import org.apache.hadoop.fs.FSDataOutputStream;
+import org.apache.hadoop.fs.FileSystem;
+import org.apache.hadoop.fs.Path;
+import org.apache.hadoop.hdfs.MiniDFSCluster;
+import org.apache.hadoop.hdfs.protocol.FSConstants.SafeModeAction;
+import org.apache.hadoop.io.IOUtils;
+import org.junit.Before;
+import org.junit.Test;
+
+public class TestBBWBlockReport {
+
+  private final Path src = new Path(System.getProperty("test.build.data",
+      "/tmp"), "testfile");
+
+  private Configuration conf = null;
+
+  private final String fileContent = "PartialBlockReadTest";
+
+  @Before
+  public void setUp() {
+    conf = new Configuration();
+    conf.setInt("ipc.client.connection.maxidletime", 1000);
+  }
+
+  @Test(timeout = 60000)
+  // timeout is mainly for safe mode
+  public void testDNShouldSendBBWReportIfAppendOn() throws Exception {
+    FileSystem fileSystem = null;
+    FSDataOutputStream outStream = null;
+    conf.setBoolean("dfs.support.append", true);
+    MiniDFSCluster cluster = new MiniDFSCluster(conf, 1, true, null);
+    cluster.waitActive();
+    try {
+      fileSystem = cluster.getFileSystem();
+      // Keep open stream
+      outStream = writeFileAndSync(fileSystem, src, fileContent);
+      // Parameter true will ensure that NN came out of safemode
+      cluster.restartNameNode();
+      assertEquals(
+          "Not able to read the synced block content after NameNode restart (with append support)",
+          fileContent, getFileContentFromDFS(fileSystem));
+    } finally {
+      if (null != fileSystem)
+        fileSystem.close();
+      if (null != outStream)
+        outStream.close();
+      cluster.shutdown();
+    }
+  }
+
+  @Test
+  public void testDNShouldNotSendBBWReportIfAppendOff() throws Exception {
+    FileSystem fileSystem = null;
+    FSDataOutputStream outStream = null;
+    // disable the append support
+    conf.setBoolean("dfs.support.append", false);
+    MiniDFSCluster cluster = new MiniDFSCluster(conf, 1, true, null);
+    cluster.waitActive();
+    try {
+      fileSystem = cluster.getFileSystem();
+      // Keep open stream
+      outStream = writeFileAndSync(fileSystem, src, fileContent);
+      cluster.restartNameNode(false);
+      Thread.sleep(2000);
+      assertEquals(
+          "Able to read the synced block content after NameNode restart (without append support",
+          0, getFileContentFromDFS(fileSystem).length());
+    } finally {
+      // NN will not come out of safe mode. So exited the safemode forcibly to
+      // clean the resources.
+      cluster.getNameNode().setSafeMode(SafeModeAction.SAFEMODE_LEAVE);
+      if (null != fileSystem)
+        fileSystem.close();
+      if (null != outStream)
+        outStream.close();
+      cluster.shutdown();
+    }
+  }
+
+  private String getFileContentFromDFS(FileSystem fs) throws IOException {
+    ByteArrayOutputStream bio = new ByteArrayOutputStream();
+    IOUtils.copyBytes(fs.open(src), bio, conf, true);
+    return new String(bio.toByteArray());
+  }
+
+  private FSDataOutputStream writeFileAndSync(FileSystem fs, Path src,
+      String fileContent) throws IOException {
+    FSDataOutputStream fo = fs.create(src);
+    fo.writeBytes(fileContent);
+    fo.sync();
+    return fo;
+  }
+}