Author: stack
Date: Tue Jan 26 05:51:08 2010
New Revision: 903090
URL: http://svn.apache.org/viewvc?rev=903090&view=rev
Log:
HDFS-630 In DFSOutputStream.nextBlockOutputStream(), the client can exclude
specific datanodes when locating the next block
Added:
hadoop/hdfs/branches/branch-0.21/src/test/hdfs/org/apache/hadoop/hdfs/TestDFSClientExcludedNodes.java
Added:
hadoop/hdfs/branches/branch-0.21/src/test/hdfs/org/apache/hadoop/hdfs/TestDFSClientExcludedNodes.java
URL:
http://svn.apache.org/viewvc/hadoop/hdfs/branches/branch-0.21/src/test/hdfs/org/apache/hadoop/hdfs/TestDFSClientExcludedNodes.java?rev=903090&view=auto
==============================================================================
---
hadoop/hdfs/branches/branch-0.21/src/test/hdfs/org/apache/hadoop/hdfs/TestDFSClientExcludedNodes.java
(added)
+++
hadoop/hdfs/branches/branch-0.21/src/test/hdfs/org/apache/hadoop/hdfs/TestDFSClientExcludedNodes.java
Tue Jan 26 05:51:08 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());
+ }
+ }
+
+}
