From 4d8cc9096074b7c97296d4f68dcdfa4ed1164742 Mon Sep 17 00:00:00 2001
From: unknown <zzq09494@zzq09494.tcent.cn>
Date: Tue, 5 Jan 2016 15:43:37 +0800
Subject: [PATCH] org.apache.hadoop.io.compress.BlockCompressorStream#finish
 add check compressor.getBytesRead()>0

---
 .../org/apache/hadoop/io/compress/BlockCompressorStream.java    | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/java/org/apache/hadoop/io/compress/BlockCompressorStream.java b/src/java/org/apache/hadoop/io/compress/BlockCompressorStream.java
index 5d854861f24b..6f04fd8fe0a5 100644
--- a/src/java/org/apache/hadoop/io/compress/BlockCompressorStream.java
+++ b/src/java/org/apache/hadoop/io/compress/BlockCompressorStream.java
@@ -133,7 +133,7 @@ public void write(byte[] b, int off, int len) throws IOException {
   }
 
   public void finish() throws IOException {
-    if (!compressor.finished()) {
+    if (!compressor.finished() && compressor.getBytesRead()>0) {
       rawWriteInt((int)compressor.getBytesRead());
       compressor.finish();
       while (!compressor.finished()) {