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Subject: svn commit: r903098 -
 /hadoop/hdfs/trunk/src/test/hdfs/org/apache/hadoop/hdfs/TestDFSClientExcludedNodes.java
Date: Tue, 26 Jan 2010 06:18:51 -0000
To: hdfs-commits@hadoop.apache.org
From: stack@apache.org
Message-Id: <20100126061851.D715323889B1@eris.apache.org>

Author: stack
Date: Tue Jan 26 06:18:51 2010
New Revision: 903098

URL: http://svn.apache.org/viewvc?rev=903098&view=rev
Log:
HDFS-630 In DFSOutputStream.nextBlockOutputStream(), the client can exclude specific datanodes when locating the next block

Added:
    hadoop/hdfs/trunk/src/test/hdfs/org/apache/hadoop/hdfs/TestDFSClientExcludedNodes.java

Added: hadoop/hdfs/trunk/src/test/hdfs/org/apache/hadoop/hdfs/TestDFSClientExcludedNodes.java
URL: http://svn.apache.org/viewvc/hadoop/hdfs/trunk/src/test/hdfs/org/apache/hadoop/hdfs/TestDFSClientExcludedNodes.java?rev=903098&view=auto
==============================================================================
--- hadoop/hdfs/trunk/src/test/hdfs/org/apache/hadoop/hdfs/TestDFSClientExcludedNodes.java (added)
+++ hadoop/hdfs/trunk/src/test/hdfs/org/apache/hadoop/hdfs/TestDFSClientExcludedNodes.java Tue Jan 26 06:18:51 2010
@@ -0,0 +1,56 @@
+/**
+ * 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;
+
+import java.io.IOException;
+import java.io.OutputStream;
+
+import org.junit.*;
+import static org.junit.Assert.fail;
+
+import org.apache.hadoop.conf.Configuration;
+import org.apache.hadoop.fs.FileSystem;
+import org.apache.hadoop.fs.Path;
+
+
+/**
+ * These tests make sure that DFSClient retries fetching data from DFS
+ * properly in case of errors.
+ */
+public class TestDFSClientExcludedNodes {
+
+  @Test
+  public void testExcludedNodes() throws IOException {
+    Configuration conf = new HdfsConfiguration();
+    MiniDFSCluster cluster = new MiniDFSCluster(conf, 3, true, null);
+    FileSystem fs = cluster.getFileSystem();
+    Path filePath = new Path("/testExcludedNodes");
+
+    // kill a datanode
+    cluster.stopDataNode(AppendTestUtil.nextInt(3));
+    OutputStream out = fs.create(filePath, true, 4096);
+    out.write(20);
+
+    try {
+      out.close();
+    } catch (Exception e) {
+      fail("DataNode failure should not result in a block abort: \n" + e.getMessage());
+    }
+  }
+  
+}