Merge pull request #1454 from optimizely/hao/hadoop-fixes

A couple of hdfs related fixes

extensions/hdfs-storage/src/main/java/io/druid/storage/hdfs/HdfsStorageDruidModule.java

@@ -81,6 +81,10 @@ public class HdfsStorageDruidModule implements DruidModule
     Binders.dataSegmentKillerBinder(binder).addBinding(SCHEME).to(HdfsDataSegmentKiller.class).in(LazySingleton.class);
 
     final Configuration conf = new Configuration();
+
+    // Set explicit CL. Otherwise it'll try to use thread context CL, which may not have all of our dependencies.
+    conf.setClassLoader(getClass().getClassLoader());
+
     if (props != null) {
       for (String propName : System.getProperties().stringPropertyNames()) {
         if (propName.startsWith("hadoop.")) {

indexing-hadoop/src/main/java/io/druid/indexer/JobHelper.java

@@ -518,7 +518,7 @@ public class JobHelper
   public static Path prependFSIfNullScheme(FileSystem fs, Path path)
   {
     if (path.toUri().getScheme() == null) {
-      path = new Path(fs.getUri().toString(), String.format("./%s", path));
+      path = fs.makeQualified(path);
     }
     return path;
   }