MAPREDUCE-6454. Fixed MapReduce to modify HADOOP_CLASSPATH to have distributed cache files so that child processes running hadoop scripts can access these files. Contributed by Junping Du.

hadoop-mapreduce-project/CHANGES.txt

@@ -557,6 +557,10 @@ Release 2.6.2 - UNRELEASED
 
   BUG FIXES
 
+    MAPREDUCE-6454. Fixed MapReduce to modify HADOOP_CLASSPATH to have distributed
+    cache files so that child processes running hadoop scripts can access these
+    files. (Junping Du via vinodkv)
+
 Release 2.6.1 - UNRELEASED
 
   INCOMPATIBLE CHANGES

hadoop-mapreduce-project/hadoop-mapreduce-client/hadoop-mapreduce-client-app/src/main/java/org/apache/hadoop/mapreduce/v2/app/job/impl/TaskAttemptImpl.java

@@ -173,6 +173,7 @@ public abstract class TaskAttemptImpl implements
   private static AtomicBoolean initialClasspathFlag = new AtomicBoolean();
   private static String initialClasspath = null;
   private static String initialAppClasspath = null;
+  private static String initialHadoopClasspath = null;
   private static Object commonContainerSpecLock = new Object();
   private static ContainerLaunchContext commonContainerSpec = null;
   private static final Object classpathLock = new Object();
@@ -742,6 +743,7 @@ public abstract class TaskAttemptImpl implements
       MRApps.setClasspath(env, conf);
       initialClasspath = env.get(Environment.CLASSPATH.name());
       initialAppClasspath = env.get(Environment.APP_CLASSPATH.name());
+      initialHadoopClasspath = env.get(Environment.HADOOP_CLASSPATH.name());
       initialClasspathFlag.set(true);
       return initialClasspath;
     }
@@ -879,6 +881,13 @@ public abstract class TaskAttemptImpl implements
           Environment.CLASSPATH.name(),
           getInitialClasspath(conf), conf);
 
+      if (initialHadoopClasspath != null) {
+        MRApps.addToEnvironment(
+            environment,
+            Environment.HADOOP_CLASSPATH.name(),
+            initialHadoopClasspath, conf);
+      }
+
       if (initialAppClasspath != null) {
         MRApps.addToEnvironment(
             environment,  

hadoop-mapreduce-project/hadoop-mapreduce-client/hadoop-mapreduce-client-common/src/main/java/org/apache/hadoop/mapreduce/v2/util/MRApps.java

@@ -245,11 +245,30 @@ public class MRApps extends Apps {
       conf.getBoolean(MRJobConfig.MAPREDUCE_JOB_CLASSLOADER, false)
         ? Environment.APP_CLASSPATH.name() : Environment.CLASSPATH.name();
 
+    String hadoopClasspathEnvVar = Environment.HADOOP_CLASSPATH.name();
+
     MRApps.addToEnvironment(environment,
       classpathEnvVar, crossPlatformifyMREnv(conf, Environment.PWD), conf);
+
+    MRApps.addToEnvironment(environment,
+        hadoopClasspathEnvVar, crossPlatformifyMREnv(conf, Environment.PWD),
+        conf);
+
     if (!userClassesTakesPrecedence) {
       MRApps.setMRFrameworkClasspath(environment, conf);
     }
+
+    addClasspathToEnv(environment, classpathEnvVar, conf);
+    addClasspathToEnv(environment, hadoopClasspathEnvVar, conf);
+
+    if (userClassesTakesPrecedence) {
+      MRApps.setMRFrameworkClasspath(environment, conf);
+    }
+  }
+
+  @SuppressWarnings("deprecation")
+  public static void addClasspathToEnv(Map<String, String> environment,
+      String classpathEnvVar, Configuration conf) throws IOException {
     MRApps.addToEnvironment(
         environment,
         classpathEnvVar,
@@ -257,15 +276,21 @@ public class MRApps extends Apps {
     MRApps.addToEnvironment(
         environment,
         classpathEnvVar,
-        MRJobConfig.JOB_JAR + Path.SEPARATOR + "classes" + Path.SEPARATOR, conf);
+        MRJobConfig.JOB_JAR + Path.SEPARATOR + "classes" + Path.SEPARATOR,
+        conf);
+
     MRApps.addToEnvironment(
         environment,
         classpathEnvVar,
-        MRJobConfig.JOB_JAR + Path.SEPARATOR + "lib" + Path.SEPARATOR + "*", conf);
+        MRJobConfig.JOB_JAR + Path.SEPARATOR + "lib" + Path.SEPARATOR + "*",
+        conf);
+
     MRApps.addToEnvironment(
         environment,
         classpathEnvVar,
-        crossPlatformifyMREnv(conf, Environment.PWD) + Path.SEPARATOR + "*", conf);
+        crossPlatformifyMREnv(conf, Environment.PWD) + Path.SEPARATOR + "*",
+        conf);
+
     // a * in the classpath will only find a .jar, so we need to filter out
     // all .jars and add everything else
     addToClasspathIfNotJar(DistributedCache.getFileClassPaths(conf),
@@ -276,9 +301,6 @@ public class MRApps extends Apps {
         DistributedCache.getCacheArchives(conf),
         conf,
         environment, classpathEnvVar);
-    if (userClassesTakesPrecedence) {
-      MRApps.setMRFrameworkClasspath(environment, conf);
-    }
   }
 
   /**
@@ -446,6 +468,7 @@ public class MRApps extends Apps {
     return startCommitFile;
   }
 
+  @SuppressWarnings("deprecation")
   public static void setupDistributedCache( 
       Configuration conf, 
       Map<String, LocalResource> localResources) 
@@ -478,6 +501,7 @@ public class MRApps extends Apps {
    * @param conf
    * @throws java.io.IOException
    */
+  @SuppressWarnings("deprecation")
   public static void setupDistributedCacheLocal(Configuration conf)
       throws IOException {
 
@@ -545,6 +569,7 @@ public class MRApps extends Apps {
   // TODO - Move this to MR!
   // Use TaskDistributedCacheManager.CacheFiles.makeCacheFiles(URI[], 
   // long[], boolean[], Path[], FileType)
+  @SuppressWarnings("deprecation")
   private static void parseDistributedCacheArtifacts(
       Configuration conf,
       Map<String, LocalResource> localResources,

hadoop-mapreduce-project/hadoop-mapreduce-client/hadoop-mapreduce-client-common/src/test/java/org/apache/hadoop/mapreduce/v2/util/TestMRApps.java

@@ -36,6 +36,8 @@ import java.util.HashMap;
 import java.util.List;
 import java.util.Map;
 
+import org.apache.commons.logging.Log;
+import org.apache.commons.logging.LogFactory;
 import org.apache.hadoop.conf.Configuration;
 import org.apache.hadoop.fs.FileSystem;
 import org.apache.hadoop.fs.FilterFileSystem;
@@ -67,6 +69,9 @@ import org.junit.Test;
 public class TestMRApps {
   private static File testWorkDir = null;
 
+  private static final Log LOG =
+      LogFactory.getLog(TestMRApps.class);
+
   @BeforeClass
   public static void setupTestDirs() throws IOException {
     testWorkDir = new File("target", TestMRApps.class.getCanonicalName());
@@ -193,8 +198,8 @@ public class TestMRApps {
     Job job = Job.getInstance(conf);
     Map<String, String> environment = new HashMap<String, String>();
     MRApps.setClasspath(environment, job.getConfiguration());
-    assertTrue(environment.get("CLASSPATH").startsWith(
+    assertTrue(environment.get(ApplicationConstants.Environment.CLASSPATH.
-      ApplicationConstants.Environment.PWD.$$()
+        name()).startsWith(ApplicationConstants.Environment.PWD.$$()
             + ApplicationConstants.CLASS_PATH_SEPARATOR));
     String yarnAppClasspath = job.getConfiguration().get(
         YarnConfiguration.YARN_APPLICATION_CLASSPATH,
@@ -205,7 +210,8 @@ public class TestMRApps {
           yarnAppClasspath.replaceAll(",\\s*",
             ApplicationConstants.CLASS_PATH_SEPARATOR).trim();
     }
-    assertTrue(environment.get("CLASSPATH").contains(yarnAppClasspath));
+    assertTrue(environment.get(ApplicationConstants.Environment.
+        CLASSPATH.name()).contains(yarnAppClasspath));
     String mrAppClasspath =
         job.getConfiguration().get(
             MRJobConfig.MAPREDUCE_APPLICATION_CLASSPATH,
@@ -215,7 +221,8 @@ public class TestMRApps {
           mrAppClasspath.replaceAll(",\\s*",
             ApplicationConstants.CLASS_PATH_SEPARATOR).trim();
     }
-    assertTrue(environment.get("CLASSPATH").contains(mrAppClasspath));
+    assertTrue(environment.get(ApplicationConstants.Environment.CLASSPATH.
+        name()).contains(mrAppClasspath));
   }
   
   @Test (timeout = 120000)
@@ -234,8 +241,12 @@ public class TestMRApps {
     conf.set(MRJobConfig.CACHE_ARCHIVES, testTGZQualifiedPath + "#testTGZ");
     Map<String, String> environment = new HashMap<String, String>();
     MRApps.setClasspath(environment, conf);
-    assertTrue(environment.get("CLASSPATH").startsWith(
+    assertTrue(environment.get(ApplicationConstants.Environment.CLASSPATH.name()).startsWith(
       ApplicationConstants.Environment.PWD.$$() + ApplicationConstants.CLASS_PATH_SEPARATOR));
+    assertTrue(environment.get(ApplicationConstants.Environment.
+        HADOOP_CLASSPATH.name()).startsWith(
+            ApplicationConstants.Environment.PWD.$$() +
+            ApplicationConstants.CLASS_PATH_SEPARATOR));
     String confClasspath = job.getConfiguration().get(
         YarnConfiguration.YARN_APPLICATION_CLASSPATH,
         StringUtils.join(",",
@@ -244,8 +255,19 @@ public class TestMRApps {
       confClasspath = confClasspath.replaceAll(",\\s*", ApplicationConstants.CLASS_PATH_SEPARATOR)
         .trim();
     }
-    assertTrue(environment.get("CLASSPATH").contains(confClasspath));
+    LOG.info("CLASSPATH: "+ environment.get(
-    assertTrue(environment.get("CLASSPATH").contains("testTGZ"));
+        ApplicationConstants.Environment.CLASSPATH.name()));
+    LOG.info("confClasspath: " + confClasspath);
+    assertTrue(environment.get(
+        ApplicationConstants.Environment.CLASSPATH.name()).contains(
+            confClasspath));
+    LOG.info("HADOOP_CLASSPATH: " + environment.get(
+        ApplicationConstants.Environment.HADOOP_CLASSPATH.name()));
+    assertTrue(environment.get(
+        ApplicationConstants.Environment.CLASSPATH.name()).contains("testTGZ"));
+    assertTrue(environment.get(
+        ApplicationConstants.Environment.HADOOP_CLASSPATH.name()).
+        contains("testTGZ"));
   }
 
  @Test (timeout = 120000)
@@ -259,7 +281,7 @@ public class TestMRApps {
     } catch (Exception e) {
       fail("Got exception while setting classpath");
     }
-    String env_str = env.get("CLASSPATH");
+    String env_str = env.get(ApplicationConstants.Environment.CLASSPATH.name());
     String expectedClasspath = StringUtils.join(ApplicationConstants.CLASS_PATH_SEPARATOR,
       Arrays.asList(ApplicationConstants.Environment.PWD.$$(), "job.jar/job.jar",
         "job.jar/classes/", "job.jar/lib/*",
@@ -279,7 +301,7 @@ public class TestMRApps {
     } catch (Exception e) {
       fail("Got exception while setting classpath");
     }
-    String env_str = env.get("CLASSPATH");
+    String env_str = env.get(ApplicationConstants.Environment.CLASSPATH.name());
     String expectedClasspath = StringUtils.join(ApplicationConstants.CLASS_PATH_SEPARATOR,
       Arrays.asList("job.jar/job.jar", "job.jar/classes/", "job.jar/lib/*",
         ApplicationConstants.Environment.PWD.$$() + "/*"));
@@ -296,8 +318,9 @@ public class TestMRApps {
     conf.setBoolean(MRJobConfig.MAPREDUCE_JOB_CLASSLOADER, true);
     Map<String, String> env = new HashMap<String, String>();
     MRApps.setClasspath(env, conf);
-    String cp = env.get("CLASSPATH");
+    String cp = env.get(ApplicationConstants.Environment.CLASSPATH.name());
-    String appCp = env.get("APP_CLASSPATH");
+    String appCp = env.get(ApplicationConstants.Environment.
+        APP_CLASSPATH.name());
     assertFalse("MAPREDUCE_JOB_CLASSLOADER true, but job.jar is in the"
       + " classpath!", cp.contains("jar" + ApplicationConstants.CLASS_PATH_SEPARATOR + "job"));
     assertFalse("MAPREDUCE_JOB_CLASSLOADER true, but PWD is in the classpath!",
@@ -338,7 +361,8 @@ public class TestMRApps {
         Arrays.asList(ApplicationConstants.Environment.PWD.$$(),
             FRAMEWORK_CLASSPATH, stdClasspath));
     assertEquals("Incorrect classpath with framework and no user precedence",
-        expectedClasspath, env.get("CLASSPATH"));
+        expectedClasspath, env.get(ApplicationConstants.Environment.
+            CLASSPATH.name()));
 
     env.clear();
     conf.setBoolean(MRJobConfig.MAPREDUCE_JOB_USER_CLASSPATH_FIRST, true);
@@ -347,7 +371,8 @@ public class TestMRApps {
         Arrays.asList(ApplicationConstants.Environment.PWD.$$(),
             stdClasspath, FRAMEWORK_CLASSPATH));
     assertEquals("Incorrect classpath with framework and user precedence",
-        expectedClasspath, env.get("CLASSPATH"));
+        expectedClasspath, env.get(ApplicationConstants.Environment.CLASSPATH.
+            name()));
   }
 
   @Test (timeout = 30000)

hadoop-yarn-project/hadoop-yarn/hadoop-yarn-api/src/main/java/org/apache/hadoop/yarn/api/ApplicationConstants.java

@@ -160,6 +160,11 @@ public interface ApplicationConstants {
      */
     APP_CLASSPATH("APP_CLASSPATH"),
     
+    /**
+     * $HADOOP_CLASSPATH.
+     */
+    HADOOP_CLASSPATH("HADOOP_CLASSPATH"),
+
     /**
      * $LD_LIBRARY_PATH
      */