HBASE-5870 Hadoop 23 compilation broken because JobTrackerRunner#getJobTracker() method is not found

git-svn-id: https://svn.apache.org/repos/asf/hbase/trunk@1330563 13f79535-47bb-0310-9956-ffa450edef68

src/test/java/org/apache/hadoop/hbase/HBaseTestingUtility.java

@@ -66,6 +66,7 @@ import org.apache.hadoop.hbase.io.encoding.DataBlockEncoding;
 import org.apache.hadoop.hbase.io.hfile.ChecksumUtil;
 import org.apache.hadoop.hbase.io.hfile.Compression;
 import org.apache.hadoop.hbase.io.hfile.Compression.Algorithm;
+import org.apache.hadoop.hbase.mapreduce.MapreduceTestingShim;
 import org.apache.hadoop.hbase.master.HMaster;
 import org.apache.hadoop.hbase.regionserver.HRegion;
 import org.apache.hadoop.hbase.regionserver.HRegionServer;
@@ -87,6 +88,7 @@ import org.apache.hadoop.hbase.zookeeper.ZooKeeperWatcher;
 import org.apache.hadoop.hdfs.DFSClient;
 import org.apache.hadoop.hdfs.DistributedFileSystem;
 import org.apache.hadoop.hdfs.MiniDFSCluster;
+import org.apache.hadoop.mapred.JobConf;
 import org.apache.hadoop.mapred.MiniMRCluster;
 import org.apache.hadoop.mapred.TaskLog;
 import org.apache.zookeeper.KeeperException;
@@ -1330,8 +1332,11 @@ public class HBaseTestingUtility {
     // Allow the user to override FS URI for this map-reduce cluster to use.
     mrCluster = new MiniMRCluster(servers,
       FS_URI != null ? FS_URI : FileSystem.get(conf).getUri().toString(), 1);
-    mrCluster.getJobTrackerRunner().getJobTracker().getConf().set("mapred.local.dir",
+    JobConf jobConf = MapreduceTestingShim.getJobConf(mrCluster);
+    if (jobConf != null) {
+      jobConf.set("mapred.local.dir",
           conf.get("mapred.local.dir")); //Hadoop MiniMR overwrites this while it should not
+    }
     LOG.info("Mini mapreduce cluster started");
     conf.set("mapred.job.tracker",
         mrCluster.createJobConf().get("mapred.job.tracker"));

src/test/java/org/apache/hadoop/hbase/mapreduce/MapreduceTestingShim.java

@@ -19,9 +19,12 @@ package org.apache.hadoop.hbase.mapreduce;
 
 import java.io.IOException;
 import java.lang.reflect.Constructor;
+import java.lang.reflect.InvocationTargetException;
 import java.lang.reflect.Method;
 
 import org.apache.hadoop.conf.Configuration;
+import org.apache.hadoop.mapred.JobConf;
+import org.apache.hadoop.mapred.MiniMRCluster;
 import org.apache.hadoop.mapreduce.Job;
 import org.apache.hadoop.mapreduce.JobContext;
 import org.apache.hadoop.mapreduce.JobID;
@@ -34,6 +37,7 @@ import org.apache.hadoop.mapreduce.JobID;
  */
 abstract public class MapreduceTestingShim {
   private static MapreduceTestingShim instance;
+  private static Class[] emptyParam = new Class[] {};
 
   static {
     try {
@@ -49,11 +53,17 @@ abstract public class MapreduceTestingShim {
   abstract public JobContext newJobContext(Configuration jobConf)
       throws IOException;
   
+  abstract public JobConf obtainJobConf(MiniMRCluster cluster);
+
   public static JobContext createJobContext(Configuration jobConf)
       throws IOException {
     return instance.newJobContext(jobConf);
   }
   
+  public static JobConf getJobConf(MiniMRCluster cluster) {
+    return instance.obtainJobConf(cluster);
+  }
+
   private static class MapreduceV1Shim extends MapreduceTestingShim {
     public JobContext newJobContext(Configuration jobConf) throws IOException {
       // Implementing:
@@ -68,6 +78,23 @@ abstract public class MapreduceTestingShim {
             "Failed to instantiate new JobContext(jobConf, new JobID())", e);
       }
     }
+    
+    public JobConf obtainJobConf(MiniMRCluster cluster) {
+      if (cluster == null) return null;
+      try {
+        Object runner = cluster.getJobTrackerRunner();
+        Method meth = runner.getClass().getDeclaredMethod("getJobTracker", emptyParam);
+        Object tracker = meth.invoke(runner, new Object []{});
+        Method m = tracker.getClass().getDeclaredMethod("getConf", emptyParam);
+        return (JobConf) m.invoke(tracker, new Object []{});
+      } catch (NoSuchMethodException nsme) {
+        return null;
+      } catch (InvocationTargetException ite) {
+        return null;
+      } catch (IllegalAccessException iae) {
+        return null;
+      }
+    }
   };
 
   private static class MapreduceV2Shim extends MapreduceTestingShim {
@@ -83,6 +110,19 @@ abstract public class MapreduceTestingShim {
             "Failed to return from Job.getInstance(jobConf)");
       }
     }
+    
+    public JobConf obtainJobConf(MiniMRCluster cluster) {
+      try {
+        Method meth = MiniMRCluster.class.getMethod("getJobTrackerConf", emptyParam);
+        return (JobConf) meth.invoke(cluster, new Object []{});
+      } catch (NoSuchMethodException nsme) {
+        return null;
+      } catch (InvocationTargetException ite) {
+        return null;
+      } catch (IllegalAccessException iae) {
+        return null;
+      }
+    }
   };
 
 }