YARN-3304. Cleaning up ResourceCalculatorProcessTree APIs for public use and removing inconsistencies in the default values. Contributed by Junping Du and Karthik Kambatla.

(cherry picked from commit c358368f51)

hadoop-mapreduce-project/hadoop-mapreduce-client/hadoop-mapreduce-client-core/src/main/java/org/apache/hadoop/mapred/Task.java

@@ -172,7 +172,7 @@ abstract public class Task implements Writable, Configurable {
     skipRanges.skipRangeIterator();
 
   private ResourceCalculatorProcessTree pTree;
-  private long initCpuCumulativeTime = 0;
+  private long initCpuCumulativeTime = ResourceCalculatorProcessTree.UNAVAILABLE;
 
   protected JobConf conf;
   protected MapOutputFile mapOutputFile;
@@ -851,14 +851,26 @@ abstract public class Task implements Writable, Configurable {
     }
     pTree.updateProcessTree();
     long cpuTime = pTree.getCumulativeCpuTime();
-    long pMem = pTree.getCumulativeRssmem();
+    long pMem = pTree.getRssMemorySize();
-    long vMem = pTree.getCumulativeVmem();
+    long vMem = pTree.getVirtualMemorySize();
     // Remove the CPU time consumed previously by JVM reuse
+    if (cpuTime != ResourceCalculatorProcessTree.UNAVAILABLE &&
+        initCpuCumulativeTime != ResourceCalculatorProcessTree.UNAVAILABLE) {
       cpuTime -= initCpuCumulativeTime;
+    }
+    
+    if (cpuTime != ResourceCalculatorProcessTree.UNAVAILABLE) {
       counters.findCounter(TaskCounter.CPU_MILLISECONDS).setValue(cpuTime);
+    }
+    
+    if (pMem != ResourceCalculatorProcessTree.UNAVAILABLE) {
       counters.findCounter(TaskCounter.PHYSICAL_MEMORY_BYTES).setValue(pMem);
+    }
+
+    if (vMem != ResourceCalculatorProcessTree.UNAVAILABLE) {
       counters.findCounter(TaskCounter.VIRTUAL_MEMORY_BYTES).setValue(vMem);
     }
+  }
 
   /**
    * An updater that tracks the amount of time this task has spent in GC.

hadoop-yarn-project/CHANGES.txt

@@ -802,6 +802,10 @@ Release 2.7.0 - UNRELEASED
     YARN-2213. Change proxy-user cookie log in AmIpFilter to DEBUG.
     (Varun Saxena via xgong)
 
+    YARN-3304. Cleaning up ResourceCalculatorProcessTree APIs for public use and
+    removing inconsistencies in the default values. (Junping Du and Karthik
+    Kambatla via vinodkv)
+
 Release 2.6.0 - 2014-11-18
 
   INCOMPATIBLE CHANGES

hadoop-yarn-project/hadoop-yarn/hadoop-yarn-common/src/main/java/org/apache/hadoop/yarn/util/CpuTimeTracker.java

@@ -26,7 +26,8 @@ import java.math.BigInteger;
 @InterfaceAudience.Private
 @InterfaceStability.Unstable
 public class CpuTimeTracker {
-  public static final int UNAVAILABLE = -1;
+  public static final int UNAVAILABLE =
+      ResourceCalculatorProcessTree.UNAVAILABLE;
   final long MINIMUM_UPDATE_INTERVAL;
 
   // CPU used time since system is on (ms)

hadoop-yarn-project/hadoop-yarn/hadoop-yarn-common/src/main/java/org/apache/hadoop/yarn/util/ProcfsBasedProcessTree.java

@@ -140,7 +140,7 @@ public class ProcfsBasedProcessTree extends ResourceCalculatorProcessTree {
   static private String deadPid = "-1";
   private String pid = deadPid;
   static private Pattern numberPattern = Pattern.compile("[1-9][0-9]*");
-  private Long cpuTime = 0L;
+  private long cpuTime = UNAVAILABLE;
 
   protected Map<String, ProcessInfo> processTree =
     new HashMap<String, ProcessInfo>();
@@ -340,66 +340,53 @@ public class ProcfsBasedProcessTree extends ResourceCalculatorProcessTree {
     return ret.toString();
   }
 
-  /**
-   * Get the cumulative virtual memory used by all the processes in the
-   * process-tree that are older than the passed in age.
-   *
-   * @param olderThanAge processes above this age are included in the
-   *                      memory addition
-   * @return cumulative virtual memory used by the process-tree in bytes,
-   *          for processes older than this age.
-   */
   @Override
-  public long getCumulativeVmem(int olderThanAge) {
+  public long getVirtualMemorySize(int olderThanAge) {
-    long total = 0;
+    long total = UNAVAILABLE;
     for (ProcessInfo p : processTree.values()) {
       if ((p != null) && (p.getAge() > olderThanAge)) {
+        if (total == UNAVAILABLE ) {
+          total = 0;
+        }
         total += p.getVmem();
       }
     }
     return total;
   }
 
-  /**
-   * Get the cumulative resident set size (rss) memory used by all the processes
-   * in the process-tree that are older than the passed in age.
-   *
-   * @param olderThanAge processes above this age are included in the
-   *                      memory addition
-   * @return cumulative rss memory used by the process-tree in bytes,
-   *          for processes older than this age. return 0 if it cannot be
-   *          calculated
-   */
   @Override
-  public long getCumulativeRssmem(int olderThanAge) {
+  public long getRssMemorySize(int olderThanAge) {
     if (PAGE_SIZE < 0) {
-      return 0;
+      return UNAVAILABLE;
     }
     if (smapsEnabled) {
-      return getSmapBasedCumulativeRssmem(olderThanAge);
+      return getSmapBasedRssMemorySize(olderThanAge);
     }
+    boolean isAvailable = false;
     long totalPages = 0;
     for (ProcessInfo p : processTree.values()) {
       if ((p != null) && (p.getAge() > olderThanAge)) {
         totalPages += p.getRssmemPage();
+        isAvailable = true;
       }
     }
-    return totalPages * PAGE_SIZE; // convert # pages to byte
+    return isAvailable ? totalPages * PAGE_SIZE : UNAVAILABLE; // convert # pages to byte
   }
 
   /**
-   * Get the cumulative resident set size (RSS) memory used by all the processes
+   * Get the resident set size (RSS) memory used by all the processes
    * in the process-tree that are older than the passed in age. RSS is
    * calculated based on SMAP information. Skip mappings with "r--s", "r-xs"
    * permissions to get real RSS usage of the process.
    *
    * @param olderThanAge
    *          processes above this age are included in the memory addition
-   * @return cumulative rss memory used by the process-tree in bytes, for
+   * @return rss memory used by the process-tree in bytes, for
-   *         processes older than this age. return 0 if it cannot be calculated
+   * processes older than this age. return {@link #UNAVAILABLE} if it cannot
+   * be calculated.
    */
-  private long getSmapBasedCumulativeRssmem(int olderThanAge) {
+  private long getSmapBasedRssMemorySize(int olderThanAge) {
-    long total = 0;
+    long total = UNAVAILABLE;
     for (ProcessInfo p : processTree.values()) {
       if ((p != null) && (p.getAge() > olderThanAge)) {
         ProcessTreeSmapMemInfo procMemInfo = processSMAPTree.get(p.getPid());
@@ -412,6 +399,9 @@ public class ProcfsBasedProcessTree extends ResourceCalculatorProcessTree {
                   .equalsIgnoreCase(READ_EXECUTE_WITH_SHARED_PERMISSION)) {
               continue;
             }
+            if (total == UNAVAILABLE){
+              total = 0;
+            }
             total +=
                 Math.min(info.sharedDirty, info.pss) + info.privateDirty
                     + info.privateClean;
@@ -429,30 +419,34 @@ public class ProcfsBasedProcessTree extends ResourceCalculatorProcessTree {
         }
       }
     }
-    total = (total * KB_TO_BYTES); // convert to bytes
+    if (total > 0) {
+      total *= KB_TO_BYTES; // convert to bytes
+    }
     LOG.info("SmapBasedCumulativeRssmem (bytes) : " + total);
     return total; // size
   }
 
-  /**
-   * Get the CPU time in millisecond used by all the processes in the
-   * process-tree since the process-tree created
-   *
-   * @return cumulative CPU time in millisecond since the process-tree created
-   *         return 0 if it cannot be calculated
-   */
   @Override
   public long getCumulativeCpuTime() {
     if (JIFFY_LENGTH_IN_MILLIS < 0) {
-      return 0;
+      return UNAVAILABLE;
     }
     long incJiffies = 0;
+    boolean isAvailable = false;
     for (ProcessInfo p : processTree.values()) {
       if (p != null) {
         incJiffies += p.getDtime();
+        // data is available
+        isAvailable = true;
       }
     }
+    if (isAvailable) {
+      // reset cpuTime to 0 instead of UNAVAILABLE
+      if (cpuTime == UNAVAILABLE) {
+        cpuTime = 0L;
+      }
       cpuTime += incJiffies * JIFFY_LENGTH_IN_MILLIS;
+    }
     return cpuTime;
   }
 
@@ -1031,8 +1025,8 @@ public class ProcfsBasedProcessTree extends ResourceCalculatorProcessTree {
     System.out.println("Cpu usage  " + procfsBasedProcessTree
         .getCpuUsagePercent());
     System.out.println("Vmem usage in bytes " + procfsBasedProcessTree
-        .getCumulativeVmem());
+        .getVirtualMemorySize());
     System.out.println("Rss mem usage in bytes " + procfsBasedProcessTree
-        .getCumulativeRssmem());
+        .getRssMemorySize());
   }
 }

hadoop-yarn-project/hadoop-yarn/hadoop-yarn-common/src/main/java/org/apache/hadoop/yarn/util/ResourceCalculatorProcessTree.java

@@ -23,19 +23,23 @@ import java.lang.reflect.Constructor;
 import org.apache.commons.logging.Log;
 import org.apache.commons.logging.LogFactory;
 import org.apache.hadoop.classification.InterfaceAudience.Public;
+import org.apache.hadoop.classification.InterfaceAudience.Private;
 import org.apache.hadoop.classification.InterfaceStability.Evolving;
 import org.apache.hadoop.conf.Configuration;
 import org.apache.hadoop.conf.Configured;
 
 /**
  * Interface class to obtain process resource usage
- *
+ * NOTE: This class should not be used by external users, but only by external
+ * developers to extend and include their own process-tree implementation, 
+ * especially for platforms other than Linux and Windows.
  */
 @Public
 @Evolving
 public abstract class ResourceCalculatorProcessTree extends Configured {
   static final Log LOG = LogFactory
       .getLog(ResourceCalculatorProcessTree.class);
+  public static final int UNAVAILABLE = -1;
 
   /**
    * Create process-tree instance with specified root process.
@@ -65,63 +69,64 @@ public abstract class ResourceCalculatorProcessTree extends Configured {
   public abstract String getProcessTreeDump();
 
   /**
-   * Get the cumulative virtual memory used by all the processes in the
+   * Get the virtual memory used by all the processes in the
    * process-tree.
    *
-   * @return cumulative virtual memory used by the process-tree in bytes.
+   * @return virtual memory used by the process-tree in bytes,
+   * {@link #UNAVAILABLE} if it cannot be calculated.
    */
-  public long getCumulativeVmem() {
+  public long getVirtualMemorySize() {
-    return getCumulativeVmem(0);
+    return getVirtualMemorySize(0);
   }
 
   /**
-   * Get the cumulative resident set size (rss) memory used by all the processes
+   * Get the resident set size (rss) memory used by all the processes
    * in the process-tree.
    *
-   * @return cumulative rss memory used by the process-tree in bytes. return 0
+   * @return rss memory used by the process-tree in bytes,
-   *         if it cannot be calculated
+   * {@link #UNAVAILABLE} if it cannot be calculated.
    */
-  public long getCumulativeRssmem() {
+  public long getRssMemorySize() {
-    return getCumulativeRssmem(0);
+    return getRssMemorySize(0);
   }
 
   /**
-   * Get the cumulative virtual memory used by all the processes in the
+   * Get the virtual memory used by all the processes in the
    * process-tree that are older than the passed in age.
    *
    * @param olderThanAge processes above this age are included in the
    *                     memory addition
-   * @return cumulative virtual memory used by the process-tree in bytes,
+   * @return virtual memory used by the process-tree in bytes for
-   *          for processes older than this age. return 0 if it cannot be
+   * processes older than the specified age, {@link #UNAVAILABLE} if it
-   *          calculated
+   * cannot be calculated.
    */
-  public long getCumulativeVmem(int olderThanAge) {
+  public long getVirtualMemorySize(int olderThanAge) {
-    return 0;
+    return UNAVAILABLE;
   }
 
   /**
-   * Get the cumulative resident set size (rss) memory used by all the processes
+   * Get the resident set size (rss) memory used by all the processes
    * in the process-tree that are older than the passed in age.
    *
    * @param olderThanAge processes above this age are included in the
    *                     memory addition
-   * @return cumulative rss memory used by the process-tree in bytes,
+   * @return rss memory used by the process-tree in bytes for
-   *          for processes older than this age. return 0 if it cannot be
+   * processes older than specified age, {@link #UNAVAILABLE} if it cannot be
-   *          calculated
+   * calculated.
    */
-  public long getCumulativeRssmem(int olderThanAge) {
+  public long getRssMemorySize(int olderThanAge) {
-    return 0;
+    return UNAVAILABLE;
   }
 
   /**
    * Get the CPU time in millisecond used by all the processes in the
    * process-tree since the process-tree was created
    *
-   * @return cumulative CPU time in millisecond since the process-tree created
+   * @return cumulative CPU time in millisecond since the process-tree
-   *         return 0 if it cannot be calculated
+   * created, {@link #UNAVAILABLE} if it cannot be calculated.
    */
   public long getCumulativeCpuTime() {
-    return 0;
+    return UNAVAILABLE;
   }
 
   /**
@@ -129,11 +134,11 @@ public abstract class ResourceCalculatorProcessTree extends Configured {
    * average between samples as a ratio of overall CPU cycles similar to top.
    * Thus, if 2 out of 4 cores are used this should return 200.0.
    *
-   * @return percentage CPU usage since the process-tree was created
+   * @return percentage CPU usage since the process-tree was created,
-   *         return {@link CpuTimeTracker#UNAVAILABLE} if it cannot be calculated
+   * {@link #UNAVAILABLE} if it cannot be calculated.
    */
   public float getCpuUsagePercent() {
-    return -1;
+    return UNAVAILABLE;
   }
 
   /** Verify that the tree process id is same as its process group id.
@@ -153,6 +158,7 @@ public abstract class ResourceCalculatorProcessTree extends Configured {
    * @return ResourceCalculatorProcessTree or null if ResourceCalculatorPluginTree
    *         is not available for this system.
    */
+  @Private
   public static ResourceCalculatorProcessTree getResourceCalculatorProcessTree(
     String pid, Class<? extends ResourceCalculatorProcessTree> clazz, Configuration conf) {
 

hadoop-yarn-project/hadoop-yarn/hadoop-yarn-common/src/main/java/org/apache/hadoop/yarn/util/WindowsBasedProcessTree.java

@@ -45,7 +45,7 @@ public class WindowsBasedProcessTree extends ResourceCalculatorProcessTree {
   }
   
   private String taskProcessId = null;
-  private long cpuTimeMs = 0;
+  private long cpuTimeMs = UNAVAILABLE;
   private Map<String, ProcessInfo> processTree =
       new HashMap<String, ProcessInfo>();
     
@@ -173,10 +173,13 @@ public class WindowsBasedProcessTree extends ResourceCalculatorProcessTree {
   }
 
   @Override
-  public long getCumulativeVmem(int olderThanAge) {
+  public long getVirtualMemorySize(int olderThanAge) {
-    long total = 0;
+    long total = UNAVAILABLE;
     for (ProcessInfo p : processTree.values()) {
       if ((p != null) && (p.age > olderThanAge)) {
+        if (total == UNAVAILABLE) {
+          total = 0;
+        }
         total += p.vmem;
       }
     }
@@ -184,10 +187,13 @@ public class WindowsBasedProcessTree extends ResourceCalculatorProcessTree {
   }
 
   @Override
-  public long getCumulativeRssmem(int olderThanAge) {
+  public long getRssMemorySize(int olderThanAge) {
-    long total = 0;
+    long total = UNAVAILABLE;
     for (ProcessInfo p : processTree.values()) {
       if ((p != null) && (p.age > olderThanAge)) {
+        if (total == UNAVAILABLE) {
+          total = 0;
+        }
         total += p.workingSet;
       }
     }
@@ -197,6 +203,9 @@ public class WindowsBasedProcessTree extends ResourceCalculatorProcessTree {
   @Override
   public long getCumulativeCpuTime() {
     for (ProcessInfo p : processTree.values()) {
+      if (cpuTimeMs == UNAVAILABLE) {
+        cpuTimeMs = 0;
+      }
       cpuTimeMs += p.cpuTimeMsDelta;
     }
     return cpuTimeMs;

hadoop-yarn-project/hadoop-yarn/hadoop-yarn-common/src/test/java/org/apache/hadoop/yarn/util/TestProcfsBasedProcessTree.java

@@ -19,6 +19,7 @@
 package org.apache.hadoop.yarn.util;
 
 import static org.apache.hadoop.yarn.util.ProcfsBasedProcessTree.KB_TO_BYTES;
+import static org.apache.hadoop.yarn.util.ResourceCalculatorProcessTree.UNAVAILABLE;
 import static org.junit.Assert.fail;
 import static org.junit.Assume.assumeTrue;
 
@@ -226,8 +227,8 @@ public class TestProcfsBasedProcessTree {
     p.updateProcessTree();
     Assert.assertFalse("ProcessTree must have been gone", isAlive(pid));
     Assert.assertTrue(
-      "Cumulative vmem for the gone-process is " + p.getCumulativeVmem()
+      "vmem for the gone-process is " + p.getVirtualMemorySize()
-          + " . It should be zero.", p.getCumulativeVmem() == 0);
+          + " . It should be zero.", p.getVirtualMemorySize() == 0);
     Assert.assertTrue(p.toString().equals("[ ]"));
   }
 
@@ -429,16 +430,16 @@ public class TestProcfsBasedProcessTree {
       // build the process tree.
       processTree.updateProcessTree();
 
-      // verify cumulative memory
+      // verify virtual memory
-      Assert.assertEquals("Cumulative virtual memory does not match", 600000L,
+      Assert.assertEquals("Virtual memory does not match", 600000L,
-        processTree.getCumulativeVmem());
+        processTree.getVirtualMemorySize());
 
       // verify rss memory
       long cumuRssMem =
           ProcfsBasedProcessTree.PAGE_SIZE > 0
               ? 600L * ProcfsBasedProcessTree.PAGE_SIZE : 0L;
-      Assert.assertEquals("Cumulative rss memory does not match", cumuRssMem,
+      Assert.assertEquals("rss memory does not match", cumuRssMem,
-        processTree.getCumulativeRssmem());
+        processTree.getRssMemorySize());
 
       // verify cumulative cpu time
       long cumuCpuTime =
@@ -456,8 +457,8 @@ public class TestProcfsBasedProcessTree {
       setSmapsInProceTree(processTree, true);
       // RSS=Min(shared_dirty,PSS)+PrivateClean+PrivateDirty (exclude r-xs,
       // r--s)
-      Assert.assertEquals("Cumulative rss memory does not match",
+      Assert.assertEquals("rss memory does not match",
-        (100 * KB_TO_BYTES * 3), processTree.getCumulativeRssmem());
+        (100 * KB_TO_BYTES * 3), processTree.getRssMemorySize());
 
       // test the cpu time again to see if it cumulates
       procInfos[0] =
@@ -563,9 +564,9 @@ public class TestProcfsBasedProcessTree {
               new SystemClock());
       setSmapsInProceTree(processTree, smapEnabled);
 
-      // verify cumulative memory
+      // verify virtual memory
       Assert.assertEquals("Cumulative memory does not match", 700000L,
-        processTree.getCumulativeVmem());
+        processTree.getVirtualMemorySize());
       // write one more process as child of 100.
       String[] newPids = { "500" };
       setupPidDirs(procfsRootDir, newPids);
@@ -581,34 +582,34 @@ public class TestProcfsBasedProcessTree {
 
       // check memory includes the new process.
       processTree.updateProcessTree();
-      Assert.assertEquals("Cumulative vmem does not include new process",
+      Assert.assertEquals("vmem does not include new process",
-        1200000L, processTree.getCumulativeVmem());
+        1200000L, processTree.getVirtualMemorySize());
       if (!smapEnabled) {
         long cumuRssMem =
             ProcfsBasedProcessTree.PAGE_SIZE > 0
                 ? 1200L * ProcfsBasedProcessTree.PAGE_SIZE : 0L;
-        Assert.assertEquals("Cumulative rssmem does not include new process",
+        Assert.assertEquals("rssmem does not include new process",
-          cumuRssMem, processTree.getCumulativeRssmem());
+          cumuRssMem, processTree.getRssMemorySize());
       } else {
-        Assert.assertEquals("Cumulative rssmem does not include new process",
+        Assert.assertEquals("rssmem does not include new process",
-          100 * KB_TO_BYTES * 4, processTree.getCumulativeRssmem());
+          100 * KB_TO_BYTES * 4, processTree.getRssMemorySize());
       }
 
       // however processes older than 1 iteration will retain the older value
       Assert.assertEquals(
-        "Cumulative vmem shouldn't have included new process", 700000L,
+        "vmem shouldn't have included new process", 700000L,
-        processTree.getCumulativeVmem(1));
+        processTree.getVirtualMemorySize(1));
       if (!smapEnabled) {
         long cumuRssMem =
             ProcfsBasedProcessTree.PAGE_SIZE > 0
                 ? 700L * ProcfsBasedProcessTree.PAGE_SIZE : 0L;
         Assert.assertEquals(
-          "Cumulative rssmem shouldn't have included new process", cumuRssMem,
+          "rssmem shouldn't have included new process", cumuRssMem,
-          processTree.getCumulativeRssmem(1));
+          processTree.getRssMemorySize(1));
       } else {
         Assert.assertEquals(
-          "Cumulative rssmem shouldn't have included new process",
+          "rssmem shouldn't have included new process",
-          100 * KB_TO_BYTES * 3, processTree.getCumulativeRssmem(1));
+          100 * KB_TO_BYTES * 3, processTree.getRssMemorySize(1));
       }
 
       // one more process
@@ -629,49 +630,49 @@ public class TestProcfsBasedProcessTree {
 
       // processes older than 2 iterations should be same as before.
       Assert.assertEquals(
-        "Cumulative vmem shouldn't have included new processes", 700000L,
+        "vmem shouldn't have included new processes", 700000L,
-        processTree.getCumulativeVmem(2));
+        processTree.getVirtualMemorySize(2));
       if (!smapEnabled) {
         long cumuRssMem =
             ProcfsBasedProcessTree.PAGE_SIZE > 0
                 ? 700L * ProcfsBasedProcessTree.PAGE_SIZE : 0L;
         Assert.assertEquals(
-          "Cumulative rssmem shouldn't have included new processes",
+          "rssmem shouldn't have included new processes",
-          cumuRssMem, processTree.getCumulativeRssmem(2));
+          cumuRssMem, processTree.getRssMemorySize(2));
       } else {
         Assert.assertEquals(
-          "Cumulative rssmem shouldn't have included new processes",
+          "rssmem shouldn't have included new processes",
-          100 * KB_TO_BYTES * 3, processTree.getCumulativeRssmem(2));
+          100 * KB_TO_BYTES * 3, processTree.getRssMemorySize(2));
       }
 
       // processes older than 1 iteration should not include new process,
       // but include process 500
       Assert.assertEquals(
-        "Cumulative vmem shouldn't have included new processes", 1200000L,
+        "vmem shouldn't have included new processes", 1200000L,
-        processTree.getCumulativeVmem(1));
+        processTree.getVirtualMemorySize(1));
       if (!smapEnabled) {
         long cumuRssMem =
             ProcfsBasedProcessTree.PAGE_SIZE > 0
                 ? 1200L * ProcfsBasedProcessTree.PAGE_SIZE : 0L;
         Assert.assertEquals(
-          "Cumulative rssmem shouldn't have included new processes",
+          "rssmem shouldn't have included new processes",
-          cumuRssMem, processTree.getCumulativeRssmem(1));
+          cumuRssMem, processTree.getRssMemorySize(1));
       } else {
         Assert.assertEquals(
-          "Cumulative rssmem shouldn't have included new processes",
+          "rssmem shouldn't have included new processes",
-          100 * KB_TO_BYTES * 4, processTree.getCumulativeRssmem(1));
+          100 * KB_TO_BYTES * 4, processTree.getRssMemorySize(1));
       }
 
-      // no processes older than 3 iterations, this should be 0
+      // no processes older than 3 iterations
       Assert.assertEquals(
-        "Getting non-zero vmem for processes older than 3 iterations", 0L,
+          "Getting non-zero vmem for processes older than 3 iterations",
-        processTree.getCumulativeVmem(3));
+          UNAVAILABLE, processTree.getVirtualMemorySize(3));
       Assert.assertEquals(
-        "Getting non-zero rssmem for processes older than 3 iterations", 0L,
+          "Getting non-zero rssmem for processes older than 3 iterations",
-        processTree.getCumulativeRssmem(3));
+          UNAVAILABLE, processTree.getRssMemorySize(3));
       Assert.assertEquals(
-        "Getting non-zero rssmem for processes older than 3 iterations", 0L,
+          "Getting non-zero rssmem for processes older than 3 iterations",
-        processTree.getCumulativeRssmem(3));
+          UNAVAILABLE, processTree.getRssMemorySize(3));
     } finally {
       FileUtil.fullyDelete(procfsRootDir);
     }

hadoop-yarn-project/hadoop-yarn/hadoop-yarn-common/src/test/java/org/apache/hadoop/yarn/util/TestResourceCalculatorProcessTree.java

@@ -41,11 +41,11 @@ public class TestResourceCalculatorProcessTree {
       return "Empty tree for testing";
     }
 
-    public long getCumulativeRssmem(int age) {
+    public long getRssMemorySize(int age) {
       return 0;
     }
 
-    public long getCumulativeVmem(int age) {
+    public long getVirtualMemorySize(int age) {
       return 0;
     }
 

hadoop-yarn-project/hadoop-yarn/hadoop-yarn-common/src/test/java/org/apache/hadoop/yarn/util/TestWindowsBasedProcessTree.java

@@ -53,26 +53,26 @@ public class TestWindowsBasedProcessTree {
     WindowsBasedProcessTreeTester pTree = new WindowsBasedProcessTreeTester("-1");
     pTree.infoStr = "3524,1024,1024,500\r\n2844,1024,1024,500\r\n";
     pTree.updateProcessTree();
-    assertTrue(pTree.getCumulativeVmem() == 2048);
+    assertTrue(pTree.getVirtualMemorySize() == 2048);
-    assertTrue(pTree.getCumulativeVmem(0) == 2048);
+    assertTrue(pTree.getVirtualMemorySize(0) == 2048);
-    assertTrue(pTree.getCumulativeRssmem() == 2048);
+    assertTrue(pTree.getRssMemorySize() == 2048);
-    assertTrue(pTree.getCumulativeRssmem(0) == 2048);
+    assertTrue(pTree.getRssMemorySize(0) == 2048);
     assertTrue(pTree.getCumulativeCpuTime() == 1000);
 
     pTree.infoStr = "3524,1024,1024,1000\r\n2844,1024,1024,1000\r\n1234,1024,1024,1000\r\n";
     pTree.updateProcessTree();
-    assertTrue(pTree.getCumulativeVmem() == 3072);
+    assertTrue(pTree.getVirtualMemorySize() == 3072);
-    assertTrue(pTree.getCumulativeVmem(1) == 2048);
+    assertTrue(pTree.getVirtualMemorySize(1) == 2048);
-    assertTrue(pTree.getCumulativeRssmem() == 3072);
+    assertTrue(pTree.getRssMemorySize() == 3072);
-    assertTrue(pTree.getCumulativeRssmem(1) == 2048);
+    assertTrue(pTree.getRssMemorySize(1) == 2048);
     assertTrue(pTree.getCumulativeCpuTime() == 3000);
 
     pTree.infoStr = "3524,1024,1024,1500\r\n2844,1024,1024,1500\r\n";
     pTree.updateProcessTree();
-    assertTrue(pTree.getCumulativeVmem() == 2048);
+    assertTrue(pTree.getVirtualMemorySize() == 2048);
-    assertTrue(pTree.getCumulativeVmem(2) == 2048);
+    assertTrue(pTree.getVirtualMemorySize(2) == 2048);
-    assertTrue(pTree.getCumulativeRssmem() == 2048);
+    assertTrue(pTree.getRssMemorySize() == 2048);
-    assertTrue(pTree.getCumulativeRssmem(2) == 2048);
+    assertTrue(pTree.getRssMemorySize(2) == 2048);
     assertTrue(pTree.getCumulativeCpuTime() == 4000);
   }
 }

hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-nodemanager/src/main/java/org/apache/hadoop/yarn/server/nodemanager/containermanager/monitor/ContainerMetrics.java

@@ -188,14 +188,20 @@ public class ContainerMetrics implements MetricsSource {
   }
 
   public void recordMemoryUsage(int memoryMBs) {
+    if (memoryMBs >= 0) {
       this.pMemMBsStat.add(memoryMBs);
     }
+  }
 
   public void recordCpuUsage(
       int totalPhysicalCpuPercent, int milliVcoresUsed) {
+    if (totalPhysicalCpuPercent >=0) {
       this.cpuCoreUsagePercent.add(totalPhysicalCpuPercent);
+    }
+    if (milliVcoresUsed >= 0) {
       this.milliVcoresUsed.add(milliVcoresUsed);
     }
+  }
 
   public void recordProcessId(String processId) {
     registry.tag(PROCESSID_INFO, processId);

hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-nodemanager/src/main/java/org/apache/hadoop/yarn/server/nodemanager/containermanager/monitor/ContainersMonitorImpl.java

@@ -333,10 +333,10 @@ public class ContainersMonitorImpl extends AbstractService implements
   // method provided just for easy testing purposes
   boolean isProcessTreeOverLimit(ResourceCalculatorProcessTree pTree,
       String containerId, long limit) {
-    long currentMemUsage = pTree.getCumulativeVmem();
+    long currentMemUsage = pTree.getVirtualMemorySize();
     // as processes begin with an age 1, we want to see if there are processes
     // more than 1 iteration old.
-    long curMemUsageOfAgedProcesses = pTree.getCumulativeVmem(1);
+    long curMemUsageOfAgedProcesses = pTree.getVirtualMemorySize(1);
     return isProcessTreeOverLimit(containerId, currentMemUsage,
                                   curMemUsageOfAgedProcesses, limit);
   }
@@ -437,8 +437,8 @@ public class ContainersMonitorImpl extends AbstractService implements
                 + " ContainerId = " + containerId);
             ResourceCalculatorProcessTree pTree = ptInfo.getProcessTree();
             pTree.updateProcessTree();    // update process-tree
-            long currentVmemUsage = pTree.getCumulativeVmem();
+            long currentVmemUsage = pTree.getVirtualMemorySize();
-            long currentPmemUsage = pTree.getCumulativeRssmem();
+            long currentPmemUsage = pTree.getRssMemorySize();
             // if machine has 6 cores and 3 are used,
             // cpuUsagePercentPerCore should be 300% and
             // cpuUsageTotalCoresPercentage should be 50%
@@ -451,8 +451,8 @@ public class ContainersMonitorImpl extends AbstractService implements
                 * maxVCoresAllottedForContainers /nodeCpuPercentageForYARN);
             // as processes begin with an age 1, we want to see if there
             // are processes more than 1 iteration old.
-            long curMemUsageOfAgedProcesses = pTree.getCumulativeVmem(1);
+            long curMemUsageOfAgedProcesses = pTree.getVirtualMemorySize(1);
-            long curRssMemUsageOfAgedProcesses = pTree.getCumulativeRssmem(1);
+            long curRssMemUsageOfAgedProcesses = pTree.getRssMemorySize(1);
             long vmemLimit = ptInfo.getVmemLimit();
             long pmemLimit = ptInfo.getPmemLimit();
             LOG.info(String.format(