HDFS-4637. INodeDirectory#replaceSelf4Quota may incorrectly convert a newly created directory to an INodeDirectoryWithSnapshot. Contributed by Jing Zhao

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/branches/HDFS-2802@1463075 13f79535-47bb-0310-9956-ffa450edef68

hadoop-hdfs-project/hadoop-hdfs/CHANGES.HDFS-2802.txt

@@ -220,3 +220,6 @@ Branch-2802 Snapshot (Unreleased)
   HDFS-4648. For snapshot deletion, when merging the diff from to-delete
   snapshot to the prior snapshot, make sure files/directories created after
   the prior snapshot get deleted. (Jing Zhao via szetszwo)
+
+  HDFS-4637. INodeDirectory#replaceSelf4Quota may incorrectly convert a newly
+  created directory to an INodeDirectoryWithSnapshot. (Jing Zhao via szetszwo)

hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/namenode/INodeDirectory.java

@@ -159,7 +159,7 @@ public class INodeDirectory extends INodeWithAdditionalFields {
     Preconditions.checkState(!(this instanceof INodeDirectoryWithQuota),
         "this is already an INodeDirectoryWithQuota, this=%s", this);
 
-    if (latest == null) {
+    if (!this.isInLatestSnapshot(latest)) {
       final INodeDirectoryWithQuota q = new INodeDirectoryWithQuota(
           this, true, nsQuota, dsQuota);
       replaceSelf(q);

hadoop-hdfs-project/hadoop-hdfs/src/test/java/org/apache/hadoop/hdfs/server/namenode/snapshot/TestSetQuotaWithSnapshot.java

@@ -0,0 +1,93 @@
+/**
+ * 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.snapshot;
+
+import static org.junit.Assert.assertFalse;
+import static org.junit.Assert.assertTrue;
+
+import org.apache.hadoop.conf.Configuration;
+import org.apache.hadoop.fs.Path;
+import org.apache.hadoop.hdfs.DFSConfigKeys;
+import org.apache.hadoop.hdfs.DFSTestUtil;
+import org.apache.hadoop.hdfs.DistributedFileSystem;
+import org.apache.hadoop.hdfs.MiniDFSCluster;
+import org.apache.hadoop.hdfs.server.namenode.FSDirectory;
+import org.apache.hadoop.hdfs.server.namenode.FSNamesystem;
+import org.apache.hadoop.hdfs.server.namenode.INodeDirectory;
+import org.junit.After;
+import org.junit.Before;
+import org.junit.Rule;
+import org.junit.Test;
+import org.junit.rules.ExpectedException;
+
+public class TestSetQuotaWithSnapshot {
+  protected static final long seed = 0;
+  protected static final short REPLICATION = 3;
+  protected static final long BLOCKSIZE = 1024;
+  
+  protected Configuration conf;
+  protected MiniDFSCluster cluster;
+  protected FSNamesystem fsn;
+  protected FSDirectory fsdir;
+  protected DistributedFileSystem hdfs;
+  
+  @Rule
+  public ExpectedException exception = ExpectedException.none();
+
+  @Before
+  public void setUp() throws Exception {
+    conf = new Configuration();
+    conf.setLong(DFSConfigKeys.DFS_BLOCK_SIZE_KEY, BLOCKSIZE);
+    cluster = new MiniDFSCluster.Builder(conf).numDataNodes(REPLICATION)
+        .format(true).build();
+    cluster.waitActive();
+
+    fsn = cluster.getNamesystem();
+    fsdir = fsn.getFSDirectory();
+    hdfs = cluster.getFileSystem();
+  }
+
+  @After
+  public void tearDown() throws Exception {
+    if (cluster != null) {
+      cluster.shutdown();
+    }
+  }
+  
+  @Test (timeout=60000)
+  public void testSetQuota() throws Exception {
+    final Path dir = new Path("/TestSnapshot");
+    hdfs.mkdirs(dir);
+    // allow snapshot on dir and create snapshot s1
+    SnapshotTestHelper.createSnapshot(hdfs, dir, "s1");
+    
+    Path sub = new Path(dir, "sub");
+    hdfs.mkdirs(sub);
+    Path fileInSub = new Path(sub, "file");
+    DFSTestUtil.createFile(hdfs, fileInSub, BLOCKSIZE, REPLICATION, seed);
+    INodeDirectory subNode = INodeDirectory.valueOf(
+        fsdir.getINode(sub.toString()), sub);
+    // subNode should be a INodeDirectory, but not an INodeDirectoryWithSnapshot
+    assertFalse(subNode instanceof INodeDirectoryWithSnapshot);
+    
+    hdfs.setQuota(sub, Long.MAX_VALUE - 1, Long.MAX_VALUE - 1);
+    subNode = INodeDirectory.valueOf(fsdir.getINode(sub.toString()), sub);
+    assertTrue(subNode.isQuotaSet());
+    assertFalse(subNode instanceof INodeDirectoryWithSnapshot);
+  }
+}

hadoop-hdfs-project/hadoop-hdfs/src/test/java/org/apache/hadoop/hdfs/server/namenode/snapshot/TestSnapshotDeletion.java

@@ -61,7 +61,6 @@ public class TestSnapshotDeletion {
   protected static final short REPLICATION = 3;
   protected static final short REPLICATION_1 = 2;
   protected static final long BLOCKSIZE = 1024;
-  public static final int SNAPSHOTNUMBER = 10;
   
   private final Path dir = new Path("/TestSnapshot");
   private final Path sub = new Path(dir, "sub1");