Author: ddas
Date: Thu Dec 11 21:18:36 2008
New Revision: 725907
URL: http://svn.apache.org/viewvc?rev=725907&view=rev
Log:
HADOOP-4620. Committing the testcase that I forgot to add earlier.
Added:
hadoop/core/trunk/src/contrib/streaming/src/test/org/apache/hadoop/streaming/TestStreamingEmptyInpNonemptyOut.java
Added:
hadoop/core/trunk/src/contrib/streaming/src/test/org/apache/hadoop/streaming/TestStreamingEmptyInpNonemptyOut.java
URL:
http://svn.apache.org/viewvc/hadoop/core/trunk/src/contrib/streaming/src/test/org/apache/hadoop/streaming/TestStreamingEmptyInpNonemptyOut.java?rev=725907&view=auto
==============================================================================
---
hadoop/core/trunk/src/contrib/streaming/src/test/org/apache/hadoop/streaming/TestStreamingEmptyInpNonemptyOut.java
(added)
+++
hadoop/core/trunk/src/contrib/streaming/src/test/org/apache/hadoop/streaming/TestStreamingEmptyInpNonemptyOut.java
Thu Dec 11 21:18:36 2008
@@ -0,0 +1,116 @@
+/**
+ * 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.streaming;
+
+import junit.framework.TestCase;
+import java.io.*;
+
+/**
+ * This class tests hadoopStreaming in MapReduce local mode by giving
+ * empty input to mapper and the mapper generates nonempty output. Since map()
+ * is not called at all, output thread was not getting created and the mapper
+ * was hanging forever. Now this issue is solved. Similarly reducer is also
+ * checked for task completion with empty input and nonempty output.
+ */
+public class TestStreamingEmptyInpNonemptyOut extends TestCase
+{
+
+ protected File INPUT_FILE = new File("emptyInputFile.txt");
+ protected File OUTPUT_DIR = new File("out");
+ protected File SCRIPT_FILE = new File("perlScript.pl");
+
+ protected String map = "perlScript.pl";
+ protected String reduce = "org.apache.hadoop.mapred.lib.IdentityReducer";
+ protected String script = "#!/usr/bin/perl\nfor($count = 1500; $count >= 1;
$count--) {print \"$count \";}";
+
+ private StreamJob job;
+
+ public TestStreamingEmptyInpNonemptyOut() throws IOException
+ {
+ UtilTest utilTest = new UtilTest(getClass().getName());
+ utilTest.checkUserDir();
+ utilTest.redirectIfAntJunit();
+ }
+
+ protected void createInputAndScript() throws IOException
+ {
+ DataOutputStream out = new DataOutputStream(
+ new FileOutputStream(INPUT_FILE.getAbsoluteFile()));
+ out.close();
+
+ out = new DataOutputStream(
+ new FileOutputStream(SCRIPT_FILE.getAbsoluteFile()));
+ out.write(script.getBytes("UTF-8"));
+ out.close();
+ }
+
+ protected String[] genArgs() {
+ return new String[] {
+ "-input", INPUT_FILE.getAbsolutePath(),
+ "-output", OUTPUT_DIR.getAbsolutePath(),
+ "-mapper", map,
+ "-reducer", reduce,
+ //"-verbose",
+ //"-jobconf", "stream.debug=set"
+ "-jobconf", "keep.failed.task.files=true",
+ "-jobconf", "stream.tmpdir="+System.getProperty("test.build.data","/tmp")
+ };
+ }
+
+ public void testEmptyInputNonemptyOutput() throws IOException
+ {
+ try {
+ try {
+ OUTPUT_DIR.getAbsoluteFile().delete();
+ } catch (Exception e) {
+ }
+
+ createInputAndScript();
+ boolean mayExit = false;
+
+ // During tests, the default Configuration will use a local mapred
+ // So don't specify -config or -cluster.
+ // First let us test if mapper doesn't hang for empty i/p and nonempty
o/p
+ job = new StreamJob(genArgs(), mayExit);
+ job.go();
+ File outFile = new File(OUTPUT_DIR, "part-00000").getAbsoluteFile();
+ outFile.delete();
+
+ // Now let us test if reducer doesn't hang for empty i/p and nonempty o/p
+ map = "org.apache.hadoop.mapred.lib.IdentityMapper";
+ reduce = "perlScript.pl";
+ job = new StreamJob(genArgs(), mayExit);
+ job.go();
+ outFile = new File(OUTPUT_DIR, "part-00000").getAbsoluteFile();
+ outFile.delete();
+ } finally {
+ File outFileCRC = new File(OUTPUT_DIR,
".part-00000.crc").getAbsoluteFile();
+ INPUT_FILE.delete();
+ SCRIPT_FILE.delete();
+ outFileCRC.delete();
+ OUTPUT_DIR.getAbsoluteFile().delete();
+ }
+ }
+
+ public static void main(String[]args) throws Exception
+ {
+ new TestStreaming().testCommandLine();
+ }
+
+}
