HBASE-2587 Corral where tests write data when running and make sure clean target removes all written; reverting part of last commit... a mistake

git-svn-id: https://svn.apache.org/repos/asf/hbase/trunk@946884 13f79535-47bb-0310-9956-ffa450edef68

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

@@ -48,8 +48,6 @@ import org.apache.hadoop.hbase.util.Writables;
 import org.apache.hadoop.hbase.zookeeper.ZooKeeperWrapper;
 import org.apache.hadoop.hdfs.MiniDFSCluster;
 import org.apache.hadoop.mapred.MiniMRCluster;
-import org.apache.hadoop.security.UnixUserGroupInformation;
-import org.apache.hadoop.security.UserGroupInformation;
 import org.apache.zookeeper.ZooKeeper;
 
 /**
@@ -72,13 +70,6 @@ public class HBaseTestingUtility {
   private File clusterTestBuildDir = null;
   private HBaseAdmin hbaseAdmin = null;
 
-  // Cache this.  For some reason only works first time I get it.  TODO: Figure
-  // out why.
-  private final static UserGroupInformation UGI;
-  static {
-    UGI = UserGroupInformation.getCurrentUGI();
-  }
-
   /**
    * System property key to get test directory value.
    */
@@ -736,23 +727,4 @@ public class HBaseTestingUtility {
   public MiniDFSCluster getDFSCluster() {
     return dfsCluster;
   }
-
-  /**
-   * Create a copy of the passed configuration laden with a new user.  Use it
-   * to do things like get a new FileSystem instance.
-   * @param c
-   * @param index Some unique number used to make a unique user.
-   * @return Copy of <code>c</code> with new user stuff loaded into it.
-   * @throws IOException
-   */
-  public static Configuration setDifferentUser(final Configuration c,
-    final int index)
-  throws IOException {
-    Configuration c2 = new Configuration(c);
-    String username = UGI.getUserName() + ".hrs." + index;
-    UnixUserGroupInformation.saveToConf(c2,
-      UnixUserGroupInformation.UGI_PROPERTY_NAME,
-      new UnixUserGroupInformation(username, new String[]{"supergroup"}));
-    return c2;
-  }
 }

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

@@ -35,7 +35,10 @@ import org.apache.hadoop.hbase.regionserver.HRegion;
 import org.apache.hadoop.hbase.regionserver.HRegionServer;
 import org.apache.hadoop.hbase.util.JVMClusterUtil;
 import org.apache.hadoop.hbase.util.Threads;
+import org.apache.hadoop.hdfs.DistributedFileSystem;
 import org.apache.hadoop.io.MapWritable;
+import org.apache.hadoop.security.UnixUserGroupInformation;
+import org.apache.hadoop.security.UserGroupInformation;
 
 /**
  * This class creates a single process HBase cluster.
@@ -47,6 +50,12 @@ public class MiniHBaseCluster implements HConstants {
   static final Log LOG = LogFactory.getLog(MiniHBaseCluster.class.getName());
   private Configuration conf;
   public LocalHBaseCluster hbaseCluster;
+  // Cache this.  For some reason only works first time I get it.  TODO: Figure
+  // out why.
+  private final static UserGroupInformation UGI;
+  static {
+    UGI = UserGroupInformation.getCurrentUGI();
+  }
 
   /**
    * Start a MiniHBaseCluster.
@@ -122,7 +131,28 @@ public class MiniHBaseCluster implements HConstants {
 
     public MiniHBaseClusterRegionServer(Configuration conf)
         throws IOException {
-      super(HBaseTestingUtility.setDifferentUser(conf, index++));
+      super(setDifferentUser(conf));
+    }
+
+    /*
+     * @param c
+     * @param currentfs We return this if we did not make a new one.
+     * @param uniqueName Same name used to help identify the created fs.
+     * @return A new fs instance if we are up on DistributeFileSystem.
+     * @throws IOException
+     */
+    private static Configuration setDifferentUser(final Configuration c)
+    throws IOException {
+      FileSystem currentfs = FileSystem.get(c);
+      if (!(currentfs instanceof DistributedFileSystem)) return c;
+      // Else distributed filesystem.  Make a new instance per daemon.  Below
+      // code is taken from the AppendTestUtil over in hdfs.
+      Configuration c2 = new Configuration(c);
+      String username = UGI.getUserName() + ".hrs." + index++;
+      UnixUserGroupInformation.saveToConf(c2,
+        UnixUserGroupInformation.UGI_PROPERTY_NAME,
+        new UnixUserGroupInformation(username, new String[]{"supergroup"}));
+      return c2;
     }
     
     @Override