diff --git a/indexing-hadoop/src/main/java/io/druid/indexer/IndexGeneratorJob.java b/indexing-hadoop/src/main/java/io/druid/indexer/IndexGeneratorJob.java
index 60f372da802..7de1194b399 100644
--- a/indexing-hadoop/src/main/java/io/druid/indexer/IndexGeneratorJob.java
+++ b/indexing-hadoop/src/main/java/io/druid/indexer/IndexGeneratorJob.java
@@ -695,9 +695,16 @@ public class IndexGeneratorJob implements Jobby
           for (File file : toMerge) {
             indexes.add(HadoopDruidIndexerConfig.INDEX_IO.loadIndex(file));
           }
+
+          log.info("starting merge of intermediate persisted segments.");
+          long mergeStartTime = System.currentTimeMillis();
           mergedBase = mergeQueryableIndex(
               indexes, aggregators, new File(baseFlushFile, "merged"), progressIndicator
           );
+          log.info(
+              "finished merge of intermediate persisted segments. time taken [%d] ms.",
+              (System.currentTimeMillis() - mergeStartTime)
+          );
         }
         final FileSystem outputFS = new Path(config.getSchema().getIOConfig().getSegmentOutputPath())
             .getFileSystem(context.getConfiguration());
diff --git a/java-util/src/main/java/io/druid/java/util/common/io/smoosh/FileSmoosher.java b/java-util/src/main/java/io/druid/java/util/common/io/smoosh/FileSmoosher.java
index 7e2991e2d01..416eacaa6fd 100644
--- a/java-util/src/main/java/io/druid/java/util/common/io/smoosh/FileSmoosher.java
+++ b/java-util/src/main/java/io/druid/java/util/common/io/smoosh/FileSmoosher.java
@@ -414,25 +414,27 @@ public class FileSmoosher implements Closeable
     final int fileNum = outFiles.size();
     File outFile = makeChunkFile(baseDir, fileNum);
     outFiles.add(outFile);
-    return new Outer(fileNum, new FileOutputStream(outFile), maxChunkSize);
+    return new Outer(fileNum, outFile, maxChunkSize);
   }
 
   public static class Outer implements SmooshedWriter
   {
     private final int fileNum;
     private final int maxLength;
+    private final File outFile;
     private final GatheringByteChannel channel;
 
     private final Closer closer = Closer.create();
     private int currOffset = 0;
 
-    Outer(int fileNum, FileOutputStream output, int maxLength)
+    Outer(int fileNum, File outFile, int maxLength) throws FileNotFoundException
     {
       this.fileNum = fileNum;
-      this.channel = output.getChannel();
+      this.outFile = outFile;
       this.maxLength = maxLength;
-      closer.register(output);
-      closer.register(channel);
+
+      FileOutputStream outStream = closer.register(new FileOutputStream(outFile));
+      this.channel = closer.register(outStream.getChannel());
     }
 
     public int getFileNum()
@@ -494,6 +496,7 @@ public class FileSmoosher implements Closeable
     public void close() throws IOException
     {
       closer.close();
+      FileSmoosher.LOG.info("Created smoosh file [%s] of size [%s] bytes.", outFile.getAbsolutePath(), outFile.length());
     }
   }
 }