HADOOP-15869. BlockDecompressorStream#decompress should not return -1 in case of IOException. Contributed by Surendra Singh Lilhore

hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/io/compress/BlockDecompressorStream.java

@@ -71,8 +71,8 @@ protected int decompress(byte[] b, int off, int len) throws IOException {
     if (noUncompressedBytes == originalBlockSize) {
       // Get original data size
       try {
-        originalBlockSize =  rawReadInt();
-      } catch (IOException ioe) {
+        originalBlockSize = rawReadInt();
+      } catch (EOFException e) {
         return -1;
       }
       noUncompressedBytes = 0;

hadoop-common-project/hadoop-common/src/test/java/org/apache/hadoop/io/compress/TestBlockDecompressorStream.java

@@ -18,11 +18,15 @@
 package org.apache.hadoop.io.compress;
 
 import static org.junit.Assert.assertEquals;
+import static org.junit.Assert.assertTrue;
 import static org.junit.Assert.fail;
 
 import java.io.ByteArrayInputStream;
 import java.io.ByteArrayOutputStream;
+import java.io.File;
+import java.io.FileInputStream;
 import java.io.IOException;
+import java.io.InputStream;
 import java.nio.ByteBuffer;
 
 import org.junit.Test;
@@ -74,4 +78,29 @@ private void testRead(int bufLen) throws IOException {
       fail("unexpected IOException : " + e);
     }
   }
+
+  @Test
+  public void testReadWhenIoExceptionOccure() throws IOException {
+    File file = new File("testReadWhenIOException");
+    try {
+      file.createNewFile();
+      InputStream io = new FileInputStream(file) {
+        @Override
+        public int read() throws IOException {
+          throw new IOException("File blocks missing");
+        }
+      };
+
+      try (BlockDecompressorStream blockDecompressorStream =
+          new BlockDecompressorStream(io, new FakeDecompressor(), 1024)) {
+        int byteRead = blockDecompressorStream.read();
+        fail("Should not return -1 in case of IOException. Byte read "
+            + byteRead);
+      } catch (IOException e) {
+        assertTrue(e.getMessage().contains("File blocks missing"));
+      }
+    } finally {
+      file.delete();
+    }
+  }
 }