YARN-8412. Move ResourceRequest.clone logic everywhere into a proper API. Contributed by Botong Huang.

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

@@ -102,6 +102,26 @@ public abstract class ResourceRequest implements Comparable<ResourceRequest> {
         .build();
   }
 
+  /**
+   * Clone a ResourceRequest object (shallow copy). Please keep it loaded with
+   * all (new) fields
+   *
+   * @param rr the object to copy from
+   * @return the copied object
+   */
+  @Public
+  @Evolving
+  public static ResourceRequest clone(ResourceRequest rr) {
+    // Please keep it loaded with all (new) fields
+    return ResourceRequest.newBuilder().priority(rr.getPriority())
+        .resourceName(rr.getResourceName()).capability(rr.getCapability())
+        .numContainers(rr.getNumContainers())
+        .relaxLocality(rr.getRelaxLocality())
+        .nodeLabelExpression(rr.getNodeLabelExpression())
+        .executionTypeRequest(rr.getExecutionTypeRequest())
+        .allocationRequestId(rr.getAllocationRequestId()).build();
+  }
+
   @Public
   @Unstable
   public static ResourceRequestBuilder newBuilder() {

hadoop-yarn-project/hadoop-yarn/hadoop-yarn-client/src/main/java/org/apache/hadoop/yarn/client/api/impl/AMRMClientImpl.java

@@ -451,16 +451,7 @@ public class AMRMClientImpl<T extends ContainerRequest> extends AMRMClient<T> {
     for(ResourceRequest r : ask) {
       // create a copy of ResourceRequest as we might change it while the
       // RPC layer is using it to send info across
-      ResourceRequest rr =
-          ResourceRequest.newBuilder().priority(r.getPriority())
-              .resourceName(r.getResourceName()).capability(r.getCapability())
-              .numContainers(r.getNumContainers())
-              .relaxLocality(r.getRelaxLocality())
-              .nodeLabelExpression(r.getNodeLabelExpression())
-              .executionTypeRequest(r.getExecutionTypeRequest())
-              .allocationRequestId(r.getAllocationRequestId())
-              .build();
-      askList.add(rr);
+      askList.add(ResourceRequest.clone(r));
     }
     return askList;
   }

hadoop-yarn-project/hadoop-yarn/hadoop-yarn-client/src/test/java/org/apache/hadoop/yarn/client/api/impl/TestAMRMClientOnRMRestart.java

@@ -570,11 +570,7 @@ public class TestAMRMClientOnRMRestart {
         ContainerUpdates updateRequests) {
       List<ResourceRequest> askCopy = new ArrayList<ResourceRequest>();
       for (ResourceRequest req : ask) {
-        ResourceRequest reqCopy =
-            ResourceRequest.newInstance(req.getPriority(),
-                req.getResourceName(), req.getCapability(),
-                req.getNumContainers(), req.getRelaxLocality());
-        askCopy.add(reqCopy);
+        askCopy.add(ResourceRequest.clone(req));
       }
       lastAsk = ask;
       lastRelease = release;

hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-common/src/main/java/org/apache/hadoop/yarn/server/AMRMClientRelayer.java

@@ -220,13 +220,7 @@ public class AMRMClientRelayer extends AbstractService
         for (ResourceRequest r : ask) {
           // create a copy of ResourceRequest as we might change it while the
           // RPC layer is using it to send info across
-          askList.add(ResourceRequest.newBuilder().priority(r.getPriority())
-              .resourceName(r.getResourceName()).capability(r.getCapability())
-              .numContainers(r.getNumContainers())
-              .relaxLocality(r.getRelaxLocality())
-              .nodeLabelExpression(r.getNodeLabelExpression())
-              .executionTypeRequest(r.getExecutionTypeRequest())
-              .allocationRequestId(r.getAllocationRequestId()).build());
+          askList.add(ResourceRequest.clone(r));
         }
 
         allocateRequest = AllocateRequest.newBuilder()

hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-common/src/main/java/org/apache/hadoop/yarn/server/federation/policies/amrmproxy/LocalityMulticastAMRMProxyPolicy.java

@@ -361,15 +361,7 @@ public class LocalityMulticastAMRMProxyPolicy extends AbstractAMRMProxyPolicy {
     for (SubClusterId targetId : targetSCs) {
       // if the calculated request is non-empty add it to the answer
       if (containerNums.get(i) > 0) {
-        ResourceRequest out =
-            ResourceRequest.newInstance(originalResourceRequest.getPriority(),
-                originalResourceRequest.getResourceName(),
-                originalResourceRequest.getCapability(),
-                originalResourceRequest.getNumContainers(),
-                originalResourceRequest.getRelaxLocality(),
-                originalResourceRequest.getNodeLabelExpression(),
-                originalResourceRequest.getExecutionTypeRequest());
-        out.setAllocationRequestId(allocationId);
+        ResourceRequest out = ResourceRequest.clone(originalResourceRequest);
         out.setNumContainers(containerNums.get(i));
         if (ResourceRequest.isAnyLocation(out.getResourceName())) {
           allocationBookkeeper.addAnyRR(targetId, out);

hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-common/src/main/java/org/apache/hadoop/yarn/server/scheduler/ResourceRequestSet.java

@@ -165,7 +165,7 @@ public class ResourceRequestSet {
       // the same numContainers value
       Map<String, ResourceRequest> newAsks = new HashMap<>();
       for (ResourceRequest rr : this.asks.values()) {
-        ResourceRequest clone = cloneResourceRequest(rr);
+        ResourceRequest clone = ResourceRequest.clone(rr);
         clone.setNumContainers(newValue);
         newAsks.put(clone.getResourceName(), clone);
       }
@@ -176,22 +176,12 @@ public class ResourceRequestSet {
         throw new YarnException(
             "No ANY RR found in requestSet with numContainers=" + oldValue);
       }
-      ResourceRequest clone = cloneResourceRequest(rr);
+      ResourceRequest clone = ResourceRequest.clone(rr);
       clone.setNumContainers(newValue);
       this.asks.put(ResourceRequest.ANY, clone);
     }
   }
 
-  private ResourceRequest cloneResourceRequest(ResourceRequest rr) {
-    return ResourceRequest.newBuilder().priority(rr.getPriority())
-        .resourceName(rr.getResourceName()).capability(rr.getCapability())
-        .numContainers(rr.getNumContainers())
-        .relaxLocality(rr.getRelaxLocality())
-        .nodeLabelExpression(rr.getNodeLabelExpression())
-        .executionTypeRequest(rr.getExecutionTypeRequest())
-        .allocationRequestId(rr.getAllocationRequestId()).build();
-  }
-
   @Override
   public String toString() {
     StringBuilder builder = new StringBuilder();

hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-common/src/main/java/org/apache/hadoop/yarn/server/utils/BuilderUtils.java

@@ -375,18 +375,6 @@ public class BuilderUtils {
     return request;
   }
 
-  public static ResourceRequest newResourceRequest(ResourceRequest r) {
-    ResourceRequest request = recordFactory
-        .newRecordInstance(ResourceRequest.class);
-    request.setPriority(r.getPriority());
-    request.setResourceName(r.getResourceName());
-    request.setCapability(r.getCapability());
-    request.setNumContainers(r.getNumContainers());
-    request.setNodeLabelExpression(r.getNodeLabelExpression());
-    request.setExecutionTypeRequest(r.getExecutionTypeRequest());
-    return request;
-  }
-
   public static ApplicationReport newApplicationReport(
       ApplicationId applicationId, ApplicationAttemptId applicationAttemptId,
       String user, String queue, String name, String host, int rpcPort,

hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-resourcemanager/src/main/java/org/apache/hadoop/yarn/server/resourcemanager/scheduler/placement/LocalityAppPlacementAllocator.java

@@ -251,14 +251,8 @@ public class LocalityAppPlacementAllocator <N extends SchedulerNode>
   }
 
   public ResourceRequest cloneResourceRequest(ResourceRequest request) {
-    ResourceRequest newRequest = ResourceRequest.newBuilder()
-        .priority(request.getPriority())
-        .allocationRequestId(request.getAllocationRequestId())
-        .resourceName(request.getResourceName())
-        .capability(request.getCapability())
-        .numContainers(1)
-        .relaxLocality(request.getRelaxLocality())
-        .nodeLabelExpression(request.getNodeLabelExpression()).build();
+    ResourceRequest newRequest = ResourceRequest.clone(request);
+    newRequest.setNumContainers(1);
     return newRequest;
   }
 

hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-resourcemanager/src/test/java/org/apache/hadoop/yarn/server/resourcemanager/Application.java

@@ -305,9 +305,8 @@ public class Application {
     
     // Note this down for next interaction with ResourceManager
     ask.remove(request);
-    ask.add(
-        org.apache.hadoop.yarn.server.utils.BuilderUtils.newResourceRequest(
-            request)); // clone to ensure the RM doesn't manipulate the same obj
+    // clone to ensure the RM doesn't manipulate the same obj
+    ask.add(ResourceRequest.clone(request));
 
     if (LOG.isDebugEnabled()) {
       LOG.debug("addResourceRequest: applicationId=" + applicationId.getId()
@@ -462,9 +461,8 @@ public class Application {
 
     // Note this for next interaction with ResourceManager
     ask.remove(request);
-    ask.add(
-        org.apache.hadoop.yarn.server.utils.BuilderUtils.newResourceRequest(
-        request)); // clone to ensure the RM doesn't manipulate the same obj
+    // clone to ensure the RM doesn't manipulate the same obj
+    ask.add(ResourceRequest.clone(request));
 
     if(LOG.isDebugEnabled()) {
       LOG.debug("updateResourceRequest:" + " application=" + applicationId

hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-resourcemanager/src/test/java/org/apache/hadoop/yarn/server/resourcemanager/TestAppManager.java

@@ -733,7 +733,7 @@ public class TestAppManager{
         ResourceRequest.newInstance(Priority.newInstance(0),
             ResourceRequest.ANY, Resources.createResource(1025), 1, true);
     req.setNodeLabelExpression(RMNodeLabelsManager.NO_LABEL);
-    asContext.setAMContainerResourceRequest(cloneResourceRequest(req));
+    asContext.setAMContainerResourceRequest(ResourceRequest.clone(req));
     // getAMContainerResourceRequests uses a singleton list of
     // getAMContainerResourceRequest
     Assert.assertEquals(req, asContext.getAMContainerResourceRequest());
@@ -1099,25 +1099,11 @@ public class TestAppManager{
         YarnConfiguration.DEFAULT_RM_SCHEDULER_MINIMUM_ALLOCATION_MB);
   }
 
-  private static ResourceRequest cloneResourceRequest(ResourceRequest req) {
-    return ResourceRequest.newInstance(
-        Priority.newInstance(req.getPriority().getPriority()),
-        new String(req.getResourceName()),
-        Resource.newInstance(req.getCapability().getMemorySize(),
-            req.getCapability().getVirtualCores()),
-        req.getNumContainers(),
-        req.getRelaxLocality(),
-        req.getNodeLabelExpression() != null
-            ? new String(req.getNodeLabelExpression()) : null,
-        ExecutionTypeRequest.newInstance(
-            req.getExecutionTypeRequest().getExecutionType()));
-  }
-
   private static List<ResourceRequest> cloneResourceRequests(
       List<ResourceRequest> reqs) {
     List<ResourceRequest> cloneReqs = new ArrayList<>();
     for (ResourceRequest req : reqs) {
-      cloneReqs.add(cloneResourceRequest(req));
+      cloneReqs.add(ResourceRequest.clone(req));
     }
     return cloneReqs;
   }