HADOOP-7090. Fix resource leaks in s3.INode, BloomMapFile, WritableUtils and CBZip2OutputStream. Contributed by Uma Maheswara Rao G

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/trunk@1143149 13f79535-47bb-0310-9956-ffa450edef68

common/CHANGES.txt

@@ -343,6 +343,9 @@ Trunk (unreleased changes)
     HADOOP-7437. IOUtils.copybytes will suppress the stream closure exceptions.
     (Uma Maheswara Rao G via szetszwo)
 
+    HADOOP-7090. Fix resource leaks in s3.INode, BloomMapFile, WritableUtils
+    and CBZip2OutputStream.  (Uma Maheswara Rao G via szetszwo)
+
 Release 0.22.0 - Unreleased
 
   INCOMPATIBLE CHANGES

common/src/java/org/apache/hadoop/fs/s3/INode.java

@@ -27,6 +27,7 @@ import java.io.InputStream;
 
 import org.apache.hadoop.classification.InterfaceAudience;
 import org.apache.hadoop.classification.InterfaceStability;
+import org.apache.hadoop.io.IOUtils;
 
 /**
  * Holds file metadata including type (regular file, or directory),
@@ -82,15 +83,20 @@ public class INode {
   public InputStream serialize() throws IOException {
     ByteArrayOutputStream bytes = new ByteArrayOutputStream();
     DataOutputStream out = new DataOutputStream(bytes);
-    out.writeByte(fileType.ordinal());
-    if (isFile()) {
-      out.writeInt(blocks.length);
-      for (int i = 0; i < blocks.length; i++) {
-        out.writeLong(blocks[i].getId());
-        out.writeLong(blocks[i].getLength());
+    try {
+      out.writeByte(fileType.ordinal());
+      if (isFile()) {
+        out.writeInt(blocks.length);
+        for (int i = 0; i < blocks.length; i++) {
+          out.writeLong(blocks[i].getId());
+          out.writeLong(blocks[i].getLength());
+        }
       }
+      out.close();
+      out = null;
+    } finally {
+      IOUtils.closeStream(out);
     }
-    out.close();
     return new ByteArrayInputStream(bytes.toByteArray());
   }
   

common/src/java/org/apache/hadoop/io/BloomMapFile.java

@@ -31,7 +31,6 @@ import org.apache.hadoop.fs.FileSystem;
 import org.apache.hadoop.fs.Path;
 import org.apache.hadoop.io.SequenceFile.CompressionType;
 import org.apache.hadoop.io.compress.CompressionCodec;
-import org.apache.hadoop.util.Options;
 import org.apache.hadoop.util.Progressable;
 import org.apache.hadoop.util.bloom.DynamicBloomFilter;
 import org.apache.hadoop.util.bloom.Filter;
@@ -187,9 +186,14 @@ public class BloomMapFile {
     public synchronized void close() throws IOException {
       super.close();
       DataOutputStream out = fs.create(new Path(dir, BLOOM_FILE_NAME), true);
-      bloomFilter.write(out);
-      out.flush();
-      out.close();
+      try {
+        bloomFilter.write(out);
+        out.flush();
+        out.close();
+        out = null;
+      } finally {
+        IOUtils.closeStream(out);
+      }
     }
 
   }
@@ -225,15 +229,20 @@ public class BloomMapFile {
     
     private void initBloomFilter(Path dirName, 
                                  Configuration conf) {
+      
+      DataInputStream in = null;
       try {
         FileSystem fs = dirName.getFileSystem(conf);
-        DataInputStream in = fs.open(new Path(dirName, BLOOM_FILE_NAME));
+        in = fs.open(new Path(dirName, BLOOM_FILE_NAME));
         bloomFilter = new DynamicBloomFilter();
         bloomFilter.readFields(in);
         in.close();
+        in = null;
       } catch (IOException ioe) {
         LOG.warn("Can't open BloomFilter: " + ioe + " - fallback to MapFile.");
         bloomFilter = null;
+      } finally {
+        IOUtils.closeStream(in);
       }
     }
     

common/src/java/org/apache/hadoop/io/WritableUtils.java

@@ -62,8 +62,13 @@ public final class WritableUtils  {
     if (bytes != null) {
       ByteArrayOutputStream bos =  new ByteArrayOutputStream();
       GZIPOutputStream gzout = new GZIPOutputStream(bos);
-      gzout.write(bytes, 0, bytes.length);
-      gzout.close();
+      try {
+        gzout.write(bytes, 0, bytes.length);
+        gzout.close();
+        gzout = null;
+      } finally {
+        IOUtils.closeStream(gzout);
+      }
       byte[] buffer = bos.toByteArray();
       int len = buffer.length;
       out.writeInt(len);

common/src/java/org/apache/hadoop/io/compress/bzip2/CBZip2OutputStream.java

@@ -27,6 +27,8 @@ package org.apache.hadoop.io.compress.bzip2;
 import java.io.OutputStream;
 import java.io.IOException;
 
+import org.apache.hadoop.io.IOUtils;
+
 /**
  * An output stream that compresses into the BZip2 format (without the file
  * header chars) into another stream.
@@ -727,8 +729,13 @@ public class CBZip2OutputStream extends OutputStream implements BZip2Constants {
   public void close() throws IOException {
     if (out != null) {
       OutputStream outShadow = this.out;
-      finish();
-      outShadow.close();
+      try {
+        finish();
+        outShadow.close();
+        outShadow = null;
+      } finally {
+        IOUtils.closeStream(outShadow);
+      }
     }
   }