From 41025cd5857267ed538769087d4d03c8c782587b Mon Sep 17 00:00:00 2001
From: Narges Shadab <54193416+Nargeshdb@users.noreply.github.com>
Date: Tue, 25 May 2021 22:43:41 -0700
Subject: [PATCH] HDFS-16031. Possible Resource Leak in
 org.apache.hadoop.hdfs.server.aliasmap#InMemoryAliasMap (#3027)

(cherry picked from commit 3fdeb7435add3593a0a367fff6e8622a73ad9fa3)
---
 .../server/aliasmap/InMemoryAliasMap.java     | 20 +++++++------------
 1 file changed, 7 insertions(+), 13 deletions(-)

diff --git a/hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/aliasmap/InMemoryAliasMap.java b/hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/aliasmap/InMemoryAliasMap.java
index bcf535740d1..4060b782085 100644
--- a/hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/aliasmap/InMemoryAliasMap.java
+++ b/hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/aliasmap/InMemoryAliasMap.java
@@ -320,21 +320,15 @@ static File createSnapshot(InMemoryAliasMap aliasMap) throws IOException {
   private static File getCompressedAliasMap(File aliasMapDir)
       throws IOException {
     File outCompressedFile = new File(aliasMapDir.getParent(), TAR_NAME);
-    BufferedOutputStream bOut = null;
-    GzipCompressorOutputStream gzOut = null;
-    TarArchiveOutputStream tOut = null;
-    try {
-      bOut = new BufferedOutputStream(
-          Files.newOutputStream(outCompressedFile.toPath()));
-      gzOut = new GzipCompressorOutputStream(bOut);
-      tOut = new TarArchiveOutputStream(gzOut);
+
+    try (BufferedOutputStream bOut = new BufferedOutputStream(
+            Files.newOutputStream(outCompressedFile.toPath()));
+         GzipCompressorOutputStream gzOut = new GzipCompressorOutputStream(bOut);
+         TarArchiveOutputStream tOut = new TarArchiveOutputStream(gzOut)){
+
       addFileToTarGzRecursively(tOut, aliasMapDir, "", new Configuration());
-    } finally {
-      if (tOut != null) {
-        tOut.finish();
-      }
-      IOUtils.cleanupWithLogger(null, tOut, gzOut, bOut);
     }
+
     return outCompressedFile;
   }