MAPREDUCE-5470. LocalJobRunner does not work on Windows. Contributed by Sandy Ryza.

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/branches/branch-2.1-beta@1516933 13f79535-47bb-0310-9956-ffa450edef68

hadoop-mapreduce-project/CHANGES.txt

@@ -64,6 +64,9 @@ Release 2.1.1-beta - UNRELEASED
     MAPREDUCE-5476. Changed MR AM recovery code to cleanup staging-directory
     only after unregistering from the RM. (Jian He via vinodkv)
 
+    MAPREDUCE-5470. LocalJobRunner does not work on Windows. (Sandy Ryza via
+    cnauroth)
+
 Release 2.1.0-beta - 2013-08-22
 
   INCOMPATIBLE CHANGES

hadoop-mapreduce-project/hadoop-mapreduce-client/hadoop-mapreduce-client-common/src/main/java/org/apache/hadoop/mapred/LocalJobRunner.java

@@ -219,7 +219,7 @@ public class LocalJobRunner implements ClientProtocol {
             info.getSplitIndex(), 1);
           map.setUser(UserGroupInformation.getCurrentUser().
               getShortUserName());
-          setupChildMapredLocalDirs(localJobDir, map, localConf);
+          setupChildMapredLocalDirs(map, localConf);
 
           MapOutputFile mapOutput = new MROutputFiles();
           mapOutput.setConf(localConf);
@@ -414,7 +414,7 @@ public class LocalJobRunner implements ClientProtocol {
                 getShortUserName());
             JobConf localConf = new JobConf(job);
             localConf.set("mapreduce.jobtracker.address", "local");
-            setupChildMapredLocalDirs(localJobDir, reduce, localConf);
+            setupChildMapredLocalDirs(reduce, localConf);
             // move map output to reduce input  
             for (int i = 0; i < mapIds.size(); i++) {
               if (!this.isInterrupted()) {
@@ -841,16 +841,18 @@ public class LocalJobRunner implements ClientProtocol {
     throw new UnsupportedOperationException("Not supported");
   }
   
-  static void setupChildMapredLocalDirs(Path localJobDir, Task t, JobConf conf) {
+  static void setupChildMapredLocalDirs(Task t, JobConf conf) {
     String[] localDirs = conf.getTrimmedStrings(MRConfig.LOCAL_DIR);
+    String jobId = t.getJobID().toString();
     String taskId = t.getTaskID().toString();
     boolean isCleanup = t.isTaskCleanupTask();
+    String user = t.getUser();
     StringBuffer childMapredLocalDir =
         new StringBuffer(localDirs[0] + Path.SEPARATOR
-            + getLocalTaskDir(localJobDir, taskId, isCleanup));
+            + getLocalTaskDir(user, jobId, taskId, isCleanup));
     for (int i = 1; i < localDirs.length; i++) {
       childMapredLocalDir.append("," + localDirs[i] + Path.SEPARATOR
-          + getLocalTaskDir(localJobDir, taskId, isCleanup));
+          + getLocalTaskDir(user, jobId, taskId, isCleanup));
     }
     LOG.debug(MRConfig.LOCAL_DIR + " for child : " + childMapredLocalDir);
     conf.set(MRConfig.LOCAL_DIR, childMapredLocalDir.toString());
@@ -859,9 +861,10 @@ public class LocalJobRunner implements ClientProtocol {
   static final String TASK_CLEANUP_SUFFIX = ".cleanup";
   static final String JOBCACHE = "jobcache";
   
-  static String getLocalTaskDir(Path localJobDir, String taskid,
+  static String getLocalTaskDir(String user, String jobid, String taskid,
       boolean isCleanupAttempt) {
-    String taskDir = localJobDir.toString() + Path.SEPARATOR + taskid;
+    String taskDir = jobDir + Path.SEPARATOR + user + Path.SEPARATOR + JOBCACHE
+      + Path.SEPARATOR + jobid + Path.SEPARATOR + taskid;
     if (isCleanupAttempt) {
       taskDir = taskDir + TASK_CLEANUP_SUFFIX;
     }