YARN-3956. Fix TestNodeManagerHardwareUtils fails on Mac (Varun Vasudev via wangda)

hadoop-yarn-project/CHANGES.txt

@@ -659,6 +659,8 @@ Release 2.8.0 - UNRELEASED
     YARN-3954. Fix TestYarnConfigurationFields#testCompareConfigurationClassAgainstXml.
     (varun saxena via rohithsharmaks)
 
+    YARN-3956. Fix TestNodeManagerHardwareUtils fails on Mac (Varun Vasudev via wangda)
+
 Release 2.7.2 - UNRELEASED
 
   INCOMPATIBLE CHANGES

hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-nodemanager/src/test/java/org/apache/hadoop/yarn/server/nodemanager/util/TestNodeManagerHardwareUtils.java

@@ -30,6 +30,11 @@ import org.mockito.Mockito;
 public class TestNodeManagerHardwareUtils {
 
   static class TestResourceCalculatorPlugin extends ResourceCalculatorPlugin {
+
+    TestResourceCalculatorPlugin() {
+      super(null);
+    }
+
     @Override
     public long getVirtualMemorySize() {
       return 0;