YARN-6679. Reduce Resource instance overhead via non-PBImpl

(Contributed by Daryn Sharp via Daniel Templeton)

hadoop-yarn-project/hadoop-yarn/hadoop-yarn-api/src/main/java/org/apache/hadoop/yarn/api/records/Resource.java

@@ -23,7 +23,6 @@
 import org.apache.hadoop.classification.InterfaceStability.Evolving;
 import org.apache.hadoop.classification.InterfaceStability.Stable;
 import org.apache.hadoop.yarn.api.ApplicationMasterProtocol;
-import org.apache.hadoop.yarn.util.Records;
 
 
 /**
@@ -53,22 +52,49 @@
 @Stable
 public abstract class Resource implements Comparable<Resource> {
 
+  private static class SimpleResource extends Resource {
+    private long memory;
+    private long vcores;
+    SimpleResource(long memory, long vcores) {
+      this.memory = memory;
+      this.vcores = vcores;
+    }
+    @Override
+    public int getMemory() {
+      return (int)memory;
+    }
+    @Override
+    public void setMemory(int memory) {
+      this.memory = memory;
+    }
+    @Override
+    public long getMemorySize() {
+      return memory;
+    }
+    @Override
+    public void setMemorySize(long memory) {
+      this.memory = memory;
+    }
+    @Override
+    public int getVirtualCores() {
+      return (int)vcores;
+    }
+    @Override
+    public void setVirtualCores(int vcores) {
+      this.vcores = vcores;
+    }
+  }
+
   @Public
   @Stable
   public static Resource newInstance(int memory, int vCores) {
-    Resource resource = Records.newRecord(Resource.class);
+    return new SimpleResource(memory, vCores);
-    resource.setMemorySize(memory);
-    resource.setVirtualCores(vCores);
-    return resource;
   }
 
   @Public
   @Stable
   public static Resource newInstance(long memory, int vCores) {
-    Resource resource = Records.newRecord(Resource.class);
+    return new SimpleResource(memory, vCores);
-    resource.setMemorySize(memory);
-    resource.setVirtualCores(vCores);
-    return resource;
   }
 
   /**
@@ -167,6 +193,15 @@ public boolean equals(Object obj) {
     return true;
   }
 
+  @Override
+  public int compareTo(Resource other) {
+    long diff = this.getMemorySize() - other.getMemorySize();
+    if (diff == 0) {
+      diff = this.getVirtualCores() - other.getVirtualCores();
+    }
+    return diff == 0 ? 0 : (diff > 0 ? 1 : -1);
+  }
+
   @Override
   public String toString() {
     return "<memory:" + getMemorySize() + ", vCores:" + getVirtualCores() + ">";

hadoop-yarn-project/hadoop-yarn/hadoop-yarn-common/src/main/java/org/apache/hadoop/yarn/api/protocolrecords/impl/pb/AllocateResponsePBImpl.java

@@ -748,7 +748,7 @@ private synchronized ResourcePBImpl convertFromProtoFormat(ResourceProto p) {
   }
 
   private synchronized ResourceProto convertToProtoFormat(Resource r) {
-    return ((ResourcePBImpl) r).getProto();
+    return ProtoUtils.convertToProtoFormat(r);
   }
 
   private synchronized PreemptionMessagePBImpl convertFromProtoFormat(PreemptionMessageProto p) {

hadoop-yarn-project/hadoop-yarn/hadoop-yarn-common/src/main/java/org/apache/hadoop/yarn/api/protocolrecords/impl/pb/GetNewApplicationResponsePBImpl.java

@@ -25,6 +25,7 @@
 import org.apache.hadoop.yarn.api.records.ApplicationId;
 import org.apache.hadoop.yarn.api.records.Resource;
 import org.apache.hadoop.yarn.api.records.impl.pb.ApplicationIdPBImpl;
+import org.apache.hadoop.yarn.api.records.impl.pb.ProtoUtils;
 import org.apache.hadoop.yarn.api.records.impl.pb.ResourcePBImpl;
 import org.apache.hadoop.yarn.proto.YarnProtos.ApplicationIdProto;
 import org.apache.hadoop.yarn.proto.YarnProtos.ResourceProto;
@@ -158,13 +159,13 @@ private ApplicationIdPBImpl convertFromProtoFormat(ApplicationIdProto p) {
   private ApplicationIdProto convertToProtoFormat(ApplicationId t) {
     return ((ApplicationIdPBImpl)t).getProto();
   }
-  
+
   private Resource convertFromProtoFormat(ResourceProto resource) {
-	  return new ResourcePBImpl(resource);
+    return new ResourcePBImpl(resource);
   }
 
   private ResourceProto convertToProtoFormat(Resource resource) {
-	  return ((ResourcePBImpl)resource).getProto();
+    return ProtoUtils.convertToProtoFormat(resource);
   }
 
-}  
+}

hadoop-yarn-project/hadoop-yarn/hadoop-yarn-common/src/main/java/org/apache/hadoop/yarn/api/protocolrecords/impl/pb/RegisterApplicationMasterResponsePBImpl.java

@@ -438,7 +438,7 @@ private Resource convertFromProtoFormat(ResourceProto resource) {
   }
 
   private ResourceProto convertToProtoFormat(Resource resource) {
-    return ((ResourcePBImpl)resource).getProto();
+    return ProtoUtils.convertToProtoFormat(resource);
   }
 
   private ContainerPBImpl convertFromProtoFormat(ContainerProto p) {

hadoop-yarn-project/hadoop-yarn/hadoop-yarn-common/src/main/java/org/apache/hadoop/yarn/api/records/impl/pb/ApplicationResourceUsageReportPBImpl.java

@@ -79,20 +79,14 @@ public String toString() {
   }
 
   private void mergeLocalToBuilder() {
-    if (this.usedResources != null
+    if (this.usedResources != null) {
-        && !((ResourcePBImpl) this.usedResources).getProto().equals(
-            builder.getUsedResources())) {
       builder.setUsedResources(convertToProtoFormat(this.usedResources));
     }
-    if (this.reservedResources != null
+    if (this.reservedResources != null) {
-        && !((ResourcePBImpl) this.reservedResources).getProto().equals(
-            builder.getReservedResources())) {
       builder.setReservedResources(
           convertToProtoFormat(this.reservedResources));
     }
-    if (this.neededResources != null
+    if (this.neededResources != null) {
-        && !((ResourcePBImpl) this.neededResources).getProto().equals(
-            builder.getNeededResources())) {
       builder.setNeededResources(convertToProtoFormat(this.neededResources));
     }
   }
@@ -257,7 +251,7 @@ private ResourcePBImpl convertFromProtoFormat(ResourceProto p) {
   }
 
   private ResourceProto convertToProtoFormat(Resource t) {
-    return ((ResourcePBImpl)t).getProto();
+    return ProtoUtils.convertToProtoFormat(t);
   }
 
   @Override

hadoop-yarn-project/hadoop-yarn/hadoop-yarn-common/src/main/java/org/apache/hadoop/yarn/api/records/impl/pb/ApplicationSubmissionContextPBImpl.java

@@ -120,9 +120,7 @@ private void mergeLocalToBuilder() {
     if (this.amContainer != null) {
       builder.setAmContainerSpec(convertToProtoFormat(this.amContainer));
     }
-    if (this.resource != null &&
+    if (this.resource != null) {
-        !((ResourcePBImpl) this.resource).getProto().equals(
-            builder.getResource())) {
       builder.setResource(convertToProtoFormat(this.resource));
     }
     if (this.applicationTags != null && !this.applicationTags.isEmpty()) {
@@ -475,7 +473,7 @@ private ResourcePBImpl convertFromProtoFormat(ResourceProto p) {
   }
 
   private ResourceProto convertToProtoFormat(Resource t) {
-    return ((ResourcePBImpl)t).getProto();
+    return ProtoUtils.convertToProtoFormat(t);
   }
 
   @Override

hadoop-yarn-project/hadoop-yarn/hadoop-yarn-common/src/main/java/org/apache/hadoop/yarn/api/records/impl/pb/ContainerPBImpl.java

@@ -93,9 +93,7 @@ private void mergeLocalToBuilder() {
             builder.getNodeId())) {
       builder.setNodeId(convertToProtoFormat(this.nodeId));
     }
-    if (this.resource != null
+    if (this.resource != null) {
-        && !((ResourcePBImpl) this.resource).getProto().equals(
-            builder.getResource())) {
       builder.setResource(convertToProtoFormat(this.resource));
     }
     if (this.priority != null && 
@@ -307,7 +305,7 @@ private ResourcePBImpl convertFromProtoFormat(ResourceProto p) {
   }
 
   private ResourceProto convertToProtoFormat(Resource t) {
-    return ((ResourcePBImpl)t).getProto();
+    return ProtoUtils.convertToProtoFormat(t);
   }
 
   private PriorityPBImpl convertFromProtoFormat(PriorityProto p) {

hadoop-yarn-project/hadoop-yarn/hadoop-yarn-common/src/main/java/org/apache/hadoop/yarn/api/records/impl/pb/ContainerReportPBImpl.java

@@ -270,9 +270,7 @@ private void mergeLocalToBuilder() {
         && !((NodeIdPBImpl) nodeId).getProto().equals(builder.getNodeId())) {
       builder.setNodeId(convertToProtoFormat(this.nodeId));
     }
-    if (this.resource != null
+    if (this.resource != null) {
-        && !((ResourcePBImpl) this.resource).getProto().equals(
-          builder.getResource())) {
       builder.setResource(convertToProtoFormat(this.resource));
     }
     if (this.priority != null
@@ -318,7 +316,7 @@ private ResourcePBImpl convertFromProtoFormat(ResourceProto p) {
   }
 
   private ResourceProto convertToProtoFormat(Resource t) {
-    return ((ResourcePBImpl) t).getProto();
+    return ProtoUtils.convertToProtoFormat(t);
   }
 
   private PriorityPBImpl convertFromProtoFormat(PriorityProto p) {

hadoop-yarn-project/hadoop-yarn/hadoop-yarn-common/src/main/java/org/apache/hadoop/yarn/api/records/impl/pb/ContainerResourceDecreasePBImpl.java

@@ -107,7 +107,7 @@ private Resource convertFromProtoFormat(ResourceProto p) {
   }
 
   private ResourceProto convertToProtoFormat(Resource t) {
-    return ((ResourcePBImpl) t).getProto();
+    return ProtoUtils.convertToProtoFormat(t);
   }
 
   private void mergeLocalToProto() {

hadoop-yarn-project/hadoop-yarn/hadoop-yarn-common/src/main/java/org/apache/hadoop/yarn/api/records/impl/pb/ContainerResourceIncreasePBImpl.java

@@ -131,7 +131,7 @@ private Resource convertFromProtoFormat(ResourceProto p) {
   }
 
   private ResourceProto convertToProtoFormat(Resource t) {
-    return ((ResourcePBImpl) t).getProto();
+    return ProtoUtils.convertToProtoFormat(t);
   }
 
   private Token convertFromProtoFormat(TokenProto p) {

hadoop-yarn-project/hadoop-yarn/hadoop-yarn-common/src/main/java/org/apache/hadoop/yarn/api/records/impl/pb/ContainerResourceIncreaseRequestPBImpl.java

@@ -111,7 +111,7 @@ private Resource convertFromProtoFormat(ResourceProto p) {
   }
 
   private ResourceProto convertToProtoFormat(Resource t) {
-    return ((ResourcePBImpl) t).getProto();
+    return ProtoUtils.convertToProtoFormat(t);
   }
 
   private void mergeLocalToProto() {

hadoop-yarn-project/hadoop-yarn/hadoop-yarn-common/src/main/java/org/apache/hadoop/yarn/api/records/impl/pb/ContainerStatusPBImpl.java

@@ -339,7 +339,7 @@ private ExecutionTypeProto convertToProtoFormat(ExecutionType e) {
   }
 
   private ResourceProto convertToProtoFormat(Resource e) {
-    return ((ResourcePBImpl)e).getProto();
+    return ProtoUtils.convertToProtoFormat(e);
   }
 
   private ResourcePBImpl convertFromProtoFormat(ResourceProto p) {

hadoop-yarn-project/hadoop-yarn/hadoop-yarn-common/src/main/java/org/apache/hadoop/yarn/api/records/impl/pb/NodeReportPBImpl.java

@@ -253,14 +253,10 @@ private void mergeLocalToBuilder() {
             builder.getNodeId())) {
       builder.setNodeId(convertToProtoFormat(this.nodeId));
     }
-    if (this.used != null
+    if (this.used != null) {
-        && !((ResourcePBImpl) this.used).getProto().equals(
-            builder.getUsed())) {
       builder.setUsed(convertToProtoFormat(this.used));
     }
-    if (this.capability != null
+    if (this.capability != null) {
-        && !((ResourcePBImpl) this.capability).getProto().equals(
-            builder.getCapability())) {
       builder.setCapability(convertToProtoFormat(this.capability));
     }
     if (this.labels != null) {
@@ -310,7 +306,7 @@ private ResourcePBImpl convertFromProtoFormat(ResourceProto p) {
   }
 
   private ResourceProto convertToProtoFormat(Resource r) {
-    return ((ResourcePBImpl) r).getProto();
+    return ProtoUtils.convertToProtoFormat(r);
   }
 
   private ResourceUtilizationPBImpl convertFromProtoFormat(

hadoop-yarn-project/hadoop-yarn/hadoop-yarn-common/src/main/java/org/apache/hadoop/yarn/api/records/impl/pb/ProtoUtils.java

@@ -359,7 +359,7 @@ public static ContainerUpdateType convertFromProtoFormat(
    * Resource
    */
   public static synchronized ResourceProto convertToProtoFormat(Resource r) {
-    return ((ResourcePBImpl) r).getProto();
+    return ResourcePBImpl.getProto(r);
   }
 
   public static Resource convertFromProtoFormat(ResourceProto resource) {

hadoop-yarn-project/hadoop-yarn/hadoop-yarn-common/src/main/java/org/apache/hadoop/yarn/api/records/impl/pb/ReservationRequestPBImpl.java

@@ -140,7 +140,7 @@ private ResourcePBImpl convertFromProtoFormat(ResourceProto p) {
   }
 
   private ResourceProto convertToProtoFormat(Resource t) {
-    return ((ResourcePBImpl) t).getProto();
+    return ProtoUtils.convertToProtoFormat(t);
   }
 
   @Override

hadoop-yarn-project/hadoop-yarn/hadoop-yarn-common/src/main/java/org/apache/hadoop/yarn/api/records/impl/pb/ResourceAllocationRequestPBImpl.java

@@ -146,7 +146,7 @@ private ResourcePBImpl convertFromProtoFormat(ResourceProto p) {
   }
 
   private ResourceProto convertToProtoFormat(Resource p) {
-    return ((ResourcePBImpl)p).getProto();
+    return ProtoUtils.convertToProtoFormat(p);
   }
 
   private void mergeLocalToBuilder() {

hadoop-yarn-project/hadoop-yarn/hadoop-yarn-common/src/main/java/org/apache/hadoop/yarn/api/records/impl/pb/ResourceOptionPBImpl.java

@@ -80,7 +80,7 @@ private void maybeInitBuilder() {
   
   private ResourceProto convertToProtoFormat(
       Resource resource) {
-    return ((ResourcePBImpl)resource).getProto();
+    return ProtoUtils.convertToProtoFormat(resource);
   }
   
   private ResourcePBImpl convertFromProtoFormat(

hadoop-yarn-project/hadoop-yarn/hadoop-yarn-common/src/main/java/org/apache/hadoop/yarn/api/records/impl/pb/ResourcePBImpl.java

@@ -31,7 +31,20 @@ public class ResourcePBImpl extends Resource {
   ResourceProto proto = ResourceProto.getDefaultInstance();
   ResourceProto.Builder builder = null;
   boolean viaProto = false;
-  
+
+  // call via ProtoUtils.convertToProtoFormat(Resource)
+  static ResourceProto getProto(Resource r) {
+    final ResourcePBImpl pb;
+    if (r instanceof ResourcePBImpl) {
+      pb = (ResourcePBImpl)r;
+    } else {
+      pb = new ResourcePBImpl();
+      pb.setMemorySize(r.getMemorySize());
+      pb.setVirtualCores(r.getVirtualCores());
+    }
+    return pb.getProto();
+  }
+
   public ResourcePBImpl() {
     builder = ResourceProto.newBuilder();
   }
@@ -89,15 +102,4 @@ public void setVirtualCores(int vCores) {
     maybeInitBuilder();
     builder.setVirtualCores(vCores);
   }
-
-  @Override
-  public int compareTo(Resource other) {
-    long diff = this.getMemorySize() - other.getMemorySize();
-    if (diff == 0) {
-      diff = this.getVirtualCores() - other.getVirtualCores();
-    }
-    return diff == 0 ? 0 : (diff > 0 ? 1 : -1);
-  }
-  
-  
 }  

hadoop-yarn-project/hadoop-yarn/hadoop-yarn-common/src/main/java/org/apache/hadoop/yarn/api/records/impl/pb/ResourceRequestPBImpl.java

@@ -217,7 +217,7 @@ private ResourcePBImpl convertFromProtoFormat(ResourceProto p) {
   }
 
   private ResourceProto convertToProtoFormat(Resource t) {
-    return ((ResourcePBImpl)t).getProto();
+    return ProtoUtils.convertToProtoFormat(t);
   }
   
   @Override

hadoop-yarn-project/hadoop-yarn/hadoop-yarn-common/src/main/java/org/apache/hadoop/yarn/security/ContainerTokenIdentifier.java

@@ -132,7 +132,7 @@ public ContainerTokenIdentifier(ContainerId containerID, int containerVersion,
     builder.setNmHostAddr(hostName);
     builder.setAppSubmitter(appSubmitter);
     if (r != null) {
-      builder.setResource(((ResourcePBImpl)r).getProto());
+      builder.setResource(ProtoUtils.convertToProtoFormat(r));
     }
     builder.setExpiryTimeStamp(expiryTimeStamp);
     builder.setMasterKeyId(masterKeyId);

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

@@ -21,7 +21,6 @@
 import org.apache.hadoop.classification.InterfaceAudience;
 import org.apache.hadoop.classification.InterfaceStability.Unstable;
 import org.apache.hadoop.yarn.api.records.*;
-import org.apache.hadoop.yarn.util.Records;
 
 @InterfaceAudience.LimitedPrivate({"YARN", "MapReduce"})
 @Unstable
@@ -123,10 +122,7 @@ public static Resource createResource(int memory) {
   }
 
   public static Resource createResource(int memory, int cores) {
-    Resource resource = Records.newRecord(Resource.class);
+    return Resource.newInstance(memory, cores);
-    resource.setMemorySize(memory);
-    resource.setVirtualCores(cores);
-    return resource;
   }
 
   public static Resource createResource(long memory) {
@@ -134,10 +130,7 @@ public static Resource createResource(long memory) {
   }
 
   public static Resource createResource(long memory, int cores) {
-    Resource resource = Records.newRecord(Resource.class);
+    return Resource.newInstance(memory, cores);
-    resource.setMemorySize(memory);
-    resource.setVirtualCores(cores);
-    return resource;
   }
 
   public static Resource none() {

hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-applicationhistoryservice/src/main/java/org/apache/hadoop/yarn/server/applicationhistoryservice/records/impl/pb/ContainerStartDataPBImpl.java

@@ -25,6 +25,7 @@
 import org.apache.hadoop.yarn.api.records.impl.pb.ContainerIdPBImpl;
 import org.apache.hadoop.yarn.api.records.impl.pb.NodeIdPBImpl;
 import org.apache.hadoop.yarn.api.records.impl.pb.PriorityPBImpl;
+import org.apache.hadoop.yarn.api.records.impl.pb.ProtoUtils;
 import org.apache.hadoop.yarn.api.records.impl.pb.ResourcePBImpl;
 import org.apache.hadoop.yarn.proto.ApplicationHistoryServerProtos.ContainerStartDataProto;
 import org.apache.hadoop.yarn.proto.ApplicationHistoryServerProtos.ContainerStartDataProtoOrBuilder;
@@ -189,9 +190,7 @@ private void mergeLocalToBuilder() {
           builder.getContainerId())) {
       builder.setContainerId(convertToProtoFormat(this.containerId));
     }
-    if (this.resource != null
+    if (this.resource != null) {
-        && !((ResourcePBImpl) this.resource).getProto().equals(
-          builder.getAllocatedResource())) {
       builder.setAllocatedResource(convertToProtoFormat(this.resource));
     }
     if (this.nodeId != null
@@ -232,7 +231,7 @@ private ContainerIdProto convertToProtoFormat(ContainerId containerId) {
   }
 
   private ResourceProto convertToProtoFormat(Resource resource) {
-    return ((ResourcePBImpl) resource).getProto();
+    return ProtoUtils.convertToProtoFormat(resource);
   }
 
   private ResourcePBImpl convertFromProtoFormat(ResourceProto resource) {

hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-common/src/main/java/org/apache/hadoop/yarn/server/api/protocolrecords/impl/pb/NMContainerStatusPBImpl.java

@@ -256,9 +256,7 @@ private void mergeLocalToBuilder() {
       builder.setContainerId(convertToProtoFormat(this.containerId));
     }
 
-    if (this.resource != null
+    if (this.resource != null) {
-        && !((ResourcePBImpl) this.resource).getProto().equals(
-          builder.getResource())) {
       builder.setResource(convertToProtoFormat(this.resource));
     }
 
@@ -295,7 +293,7 @@ private ResourcePBImpl convertFromProtoFormat(ResourceProto p) {
   }
 
   private ResourceProto convertToProtoFormat(Resource t) {
-    return ((ResourcePBImpl) t).getProto();
+    return ProtoUtils.convertToProtoFormat(t);
   }
 
   private ContainerStateProto

hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-common/src/main/java/org/apache/hadoop/yarn/server/api/protocolrecords/impl/pb/NodeHeartbeatResponsePBImpl.java

@@ -598,7 +598,7 @@ private ResourcePBImpl convertFromProtoFormat(ResourceProto p) {
   }
 
   private ResourceProto convertToProtoFormat(Resource t) {
-    return ((ResourcePBImpl)t).getProto();
+    return ProtoUtils.convertToProtoFormat(t);
   }
 
   private ApplicationIdPBImpl convertFromProtoFormat(ApplicationIdProto p) {

hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-common/src/main/java/org/apache/hadoop/yarn/server/api/protocolrecords/impl/pb/RegisterNodeManagerRequestPBImpl.java

@@ -32,6 +32,7 @@
 import org.apache.hadoop.yarn.api.records.impl.pb.ApplicationIdPBImpl;
 import org.apache.hadoop.yarn.api.records.impl.pb.NodeIdPBImpl;
 import org.apache.hadoop.yarn.api.records.impl.pb.NodeLabelPBImpl;
+import org.apache.hadoop.yarn.api.records.impl.pb.ProtoUtils;
 import org.apache.hadoop.yarn.api.records.impl.pb.ResourcePBImpl;
 import org.apache.hadoop.yarn.proto.YarnProtos.ApplicationIdProto;
 import org.apache.hadoop.yarn.proto.YarnProtos.NodeIdProto;
@@ -387,7 +388,7 @@ private static ResourcePBImpl convertFromProtoFormat(ResourceProto p) {
   }
 
   private static ResourceProto convertToProtoFormat(Resource t) {
-    return ((ResourcePBImpl)t).getProto();
+    return ProtoUtils.convertToProtoFormat(t);
   }
 
   private static NMContainerStatusPBImpl convertFromProtoFormat(

hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-common/src/main/java/org/apache/hadoop/yarn/server/api/protocolrecords/impl/pb/RegisterNodeManagerResponsePBImpl.java

@@ -21,6 +21,7 @@
 
 import org.apache.hadoop.yarn.api.records.Resource;
 import org.apache.hadoop.yarn.api.records.impl.pb.ProtoBase;
+import org.apache.hadoop.yarn.api.records.impl.pb.ProtoUtils;
 import org.apache.hadoop.yarn.api.records.impl.pb.ResourcePBImpl;
 import org.apache.hadoop.yarn.proto.YarnProtos.ResourceProto;
 import org.apache.hadoop.yarn.proto.YarnServerCommonProtos.MasterKeyProto;
@@ -250,7 +251,7 @@ private ResourcePBImpl convertFromProtoFormat(ResourceProto p) {
   }
 
   private ResourceProto convertToProtoFormat(Resource t) {
-    return ((ResourcePBImpl)t).getProto();
+    return ProtoUtils.convertToProtoFormat(t);
   }
 
   @Override

hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-common/src/test/java/org/apache/hadoop/yarn/server/api/protocolrecords/TestProtocolRecords.java

@@ -40,6 +40,9 @@
 import org.apache.hadoop.yarn.api.records.Priority;
 import org.apache.hadoop.yarn.api.records.Resource;
 import org.apache.hadoop.yarn.api.records.impl.pb.ContainerStatusPBImpl;
+import org.apache.hadoop.yarn.api.records.impl.pb.ProtoUtils;
+import org.apache.hadoop.yarn.api.records.impl.pb.ResourcePBImpl;
+import org.apache.hadoop.yarn.proto.YarnProtos.ResourceProto;
 import org.apache.hadoop.yarn.server.api.protocolrecords.impl.pb.NMContainerStatusPBImpl;
 
 import org.apache.hadoop.yarn.server.api.protocolrecords.impl.pb
@@ -55,6 +58,23 @@
 
 public class TestProtocolRecords {
 
+  @Test
+  public void testResource() {
+    final long mem = 123;
+    final int vcores = 456;
+    final Resource r = Resource.newInstance(mem, vcores);
+    // should be a lightweight SimpleResource which is a private inner class
+    // so just verify it's not the heavyweight pb impl.
+    Assert.assertFalse(r instanceof ResourcePBImpl);
+    Assert.assertEquals(mem, r.getMemorySize());
+    Assert.assertEquals(vcores, r.getVirtualCores());
+
+    ResourceProto proto = ProtoUtils.convertToProtoFormat(r);
+    Assert.assertEquals(mem, proto.getMemory());
+    Assert.assertEquals(vcores, proto.getVirtualCores());
+    Assert.assertEquals(r, ProtoUtils.convertFromProtoFormat(proto));
+  }
+
   @Test
   public void testNMContainerStatus() {
     ApplicationId appId = ApplicationId.newInstance(123456789, 1);

hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-nodemanager/src/main/java/org/apache/hadoop/yarn/server/nodemanager/recovery/NMLeveldbStateStoreService.java

@@ -44,6 +44,7 @@
 import org.apache.hadoop.yarn.api.records.ApplicationId;
 import org.apache.hadoop.yarn.api.records.ContainerId;
 import org.apache.hadoop.yarn.api.records.Resource;
+import org.apache.hadoop.yarn.api.records.impl.pb.ProtoUtils;
 import org.apache.hadoop.yarn.api.records.impl.pb.ResourcePBImpl;
 import org.apache.hadoop.yarn.conf.YarnConfiguration;
 import org.apache.hadoop.yarn.proto.YarnProtos.ResourceProto;
@@ -365,7 +366,7 @@ public void storeContainerResourceChanged(ContainerId containerId,
       try {
         // New value will overwrite old values for the same key
         batch.put(bytes(keyResChng),
-            ((ResourcePBImpl) capability).getProto().toByteArray());
+            ProtoUtils.convertToProtoFormat(capability).toByteArray());
         batch.put(bytes(keyVersion), bytes(Integer.toString(containerVersion)));
         db.write(batch);
       } finally {

hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-tests/src/test/java/org/apache/hadoop/yarn/server/ContainerTokenIdentifierForTest.java

@@ -33,6 +33,7 @@
 import org.apache.hadoop.yarn.api.records.impl.pb.ContainerIdPBImpl;
 import org.apache.hadoop.yarn.api.records.impl.pb.LogAggregationContextPBImpl;
 import org.apache.hadoop.yarn.api.records.impl.pb.PriorityPBImpl;
+import org.apache.hadoop.yarn.api.records.impl.pb.ProtoUtils;
 import org.apache.hadoop.yarn.api.records.impl.pb.ResourcePBImpl;
 import org.apache.hadoop.yarn.security.ContainerTokenIdentifier;
 import org.apache.hadoop.yarn.proto.YarnProtos.LogAggregationContextProto;
@@ -60,7 +61,7 @@ public ContainerTokenIdentifierForTest(ContainerId containerID,
     builder.setNmHostAddr(hostName);
     builder.setAppSubmitter(appSubmitter);
     if (r != null) {
-      builder.setResource(((ResourcePBImpl)r).getProto());
+      builder.setResource(ProtoUtils.convertToProtoFormat(r));
     }
     builder.setExpiryTimeStamp(expiryTimeStamp);
     builder.setMasterKeyId(masterKeyId);
@@ -91,7 +92,7 @@ public ContainerTokenIdentifierForTest(ContainerTokenIdentifier identifier,
     
     ResourcePBImpl resource = (ResourcePBImpl)identifier.getResource();
     if (resource != null) {
-      builder.setResource(resource.getProto());
+      builder.setResource(ProtoUtils.convertToProtoFormat(resource));
     }
     
     builder.setExpiryTimeStamp(identifier.getExpiryTimeStamp());