HDFS-9438. TestPipelinesFailover assumes Linux ifconfig. (John Zhuge via Yongjun Zhang)

(cherry picked from commit 8176ea7dc694841a993f2bfc30669fe22f9ec1d2)

hadoop-hdfs-project/hadoop-hdfs/CHANGES.txt

@@ -817,6 +817,9 @@ Release 2.8.0 - UNRELEASED
     HDFS-8807.  dfs.datanode.data.dir does not handle spaces between
     storageType and URI correctly.  (Anu Engineer via szetszwo)
 
+    HDFS-9438. TestPipelinesFailover assumes Linux ifconfig.
+    (John Zhuge via Yongjun Zhang)
+
   OPTIMIZATIONS
 
     HDFS-8026. Trace FSOutputSummer#writeChecksumChunks rather than

hadoop-hdfs-project/hadoop-hdfs/src/test/java/org/apache/hadoop/hdfs/server/namenode/ha/TestPipelinesFailover.java

@@ -55,6 +55,7 @@ import org.apache.hadoop.test.GenericTestUtils;
 import org.apache.hadoop.test.GenericTestUtils.DelayAnswer;
 import org.apache.hadoop.test.MultithreadedTestUtil.RepeatingTestThread;
 import org.apache.hadoop.test.MultithreadedTestUtil.TestContext;
+import org.apache.hadoop.util.Shell;
 import org.apache.hadoop.util.Shell.ShellCommandExecutor;
 import org.apache.log4j.Level;
 import org.junit.Test;
@@ -419,28 +420,28 @@ public class TestPipelinesFailover {
     // The following section of code is to help debug HDFS-6694 about
     // this test that fails from time to time due to "too many open files".
     //
-    String[] scmd = new String[] {"/bin/sh", "-c", "ulimit -a"};
-    ShellCommandExecutor sce = new ShellCommandExecutor(scmd);
-    sce.execute();
-
-    System.out.println("HDFS-6694 Debug Data BEGIN===");
-    System.out.println("'ulimit -a' output:\n" + sce.getOutput());
-
-    scmd = new String[] {"hostname"};
-    sce = new ShellCommandExecutor(scmd);
-    sce.execute();
-    System.out.println("'hostname' output:\n" + sce.getOutput());
-
-    scmd = new String[] {"ifconfig"};
-    sce = new ShellCommandExecutor(scmd);
-    sce.execute();
-    System.out.println("'ifconfig' output:\n" + sce.getOutput());
-
-    scmd = new String[] {"whoami"};
-    sce = new ShellCommandExecutor(scmd);
-    sce.execute();
-    System.out.println("'whoami' output:\n" + sce.getOutput());
-    System.out.println("===HDFS-6694 Debug Data END");
+
+    // Only collect debug data on these OSes.
+    if (Shell.LINUX || Shell.SOLARIS || Shell.MAC) {
+      System.out.println("HDFS-6694 Debug Data BEGIN===");
+      
+      String[] scmd = new String[] {"/bin/sh", "-c", "ulimit -a"};
+      ShellCommandExecutor sce = new ShellCommandExecutor(scmd);
+      sce.execute();
+      System.out.println("'ulimit -a' output:\n" + sce.getOutput());
+
+      scmd = new String[] {"hostname"};
+      sce = new ShellCommandExecutor(scmd);
+      sce.execute();
+      System.out.println("'hostname' output:\n" + sce.getOutput());
+
+      scmd = new String[] {"ifconfig", "-a"};
+      sce = new ShellCommandExecutor(scmd);
+      sce.execute();
+      System.out.println("'ifconfig' output:\n" + sce.getOutput());
+
+      System.out.println("===HDFS-6694 Debug Data END");
+    }
 
     HAStressTestHarness harness = new HAStressTestHarness();
     // Disable permissions so that another user can recover the lease.