HADOOP-16808. Use forkCount and reuseForks parameters instead of forkMode in the config of maven surefire plugin. Contributed by Xieming Li.

hadoop-hdfs-project/hadoop-hdfs-httpfs/pom.xml

@@ -368,7 +368,8 @@
             <groupId>org.apache.maven.plugins</groupId>
             <artifactId>maven-surefire-plugin</artifactId>
             <configuration>
-              <forkMode>once</forkMode>
+              <forkCount>1</forkCount>
+              <reuseForks>true</reuseForks>
               <forkedProcessTimeoutInSeconds>600</forkedProcessTimeoutInSeconds>
               <systemPropertyVariables>
                 <java.security.krb5.conf>${project.build.directory}/test-classes/krb5.conf</java.security.krb5.conf>

hadoop-tools/hadoop-distcp/pom.xml

@@ -128,7 +128,8 @@
         <groupId>org.apache.maven.plugins</groupId>
         <artifactId>maven-surefire-plugin</artifactId>
         <configuration>
-          <forkMode>always</forkMode>
+          <forkCount>1</forkCount>
+          <reuseForks>false</reuseForks>
           <forkedProcessTimeoutInSeconds>600</forkedProcessTimeoutInSeconds>
           <argLine>-Xmx1024m</argLine>
           <includes>