From 0c7a578927032d5d1ef3469283d7d1fb7dee2a56 Mon Sep 17 00:00:00 2001
From: Wei-Chiu Chuang <weichiu@apache.org>
Date: Mon, 16 Jul 2018 11:32:45 -0700
Subject: [PATCH] HADOOP-15598. DataChecksum calculate checksum is contented on
 hashtable synchronization. Contributed by Prasanth Jayachandran.

---
 .../src/main/java/org/apache/hadoop/util/NativeCrc32.java     | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/util/NativeCrc32.java b/hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/util/NativeCrc32.java
index 0669b0abd24..3142df2da36 100644
--- a/hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/util/NativeCrc32.java
+++ b/hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/util/NativeCrc32.java
@@ -28,12 +28,12 @@
  * natively.
  */
 class NativeCrc32 {
-  
+  private static final boolean isSparc = System.getProperty("os.arch").toLowerCase().startsWith("sparc");
   /**
    * Return true if the JNI-based native CRC extensions are available.
    */
   public static boolean isAvailable() {
-    if (System.getProperty("os.arch").toLowerCase().startsWith("sparc")) {
+    if (isSparc) {
       return false;
     } else {
       return NativeCodeLoader.isNativeCodeLoaded();