YARN-6370. Properly handle rack requests for non-active subclusters in LocalityMulticastAMRMProxyPolicy. (Contributed by Botong Huang via curino).

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

@@ -261,7 +261,11 @@ public class LocalityMulticastAMRMProxyPolicy extends AbstractAMRMProxyPolicy {
 
       // If home-subcluster is not active, ignore node/rack request
       if (bookkeeper.isActiveAndEnabled(homeSubcluster)) {
+        if (targetIds != null && targetIds.size() > 0) {
+          bookkeeper.addRackRR(homeSubcluster, rr);
+        } else {
           bookkeeper.addLocalizedNodeRR(homeSubcluster, rr);
+        }
       } else {
         if (LOG.isDebugEnabled()) {
           LOG.debug("The homeSubCluster (" + homeSubcluster + ") we are "

hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-common/src/test/java/org/apache/hadoop/yarn/server/federation/policies/amrmproxy/TestLocalityMulticastAMRMProxyPolicy.java

@@ -339,19 +339,20 @@ public class TestLocalityMulticastAMRMProxyPolicy
     validateSplit(response, resourceRequests);
     prettyPrintRequests(response);
 
-    // we expect 4 entry for home subcluster (3 for request-id 4, and a part
+    // we expect 7 entries for home subcluster (2 for request-id 4, 3 for
-    // of the broadcast of request-id 2
+    // request-id 5, and a part of the broadcast of request-id 2
-    checkExpectedAllocation(response, getHomeSubCluster().getId(), 4, 23);
+    checkExpectedAllocation(response, getHomeSubCluster().getId(), 7, 29);
 
-    // for subcluster0 we expect 3 entry from request-id 0, and 3 from
+    // for subcluster0 we expect 10 entries, 3 from request-id 0, and 3 from
-    // request-id 3, as well as part of the request-id 2 broadast
+    // request-id 3, 3 entries from request-id 5, as well as part of the
-    checkExpectedAllocation(response, "subcluster0", 7, 26);
+    // request-id 2 broadast
+    checkExpectedAllocation(response, "subcluster0", 10, 32);
 
-    // we expect 5 entry for subcluster1 (4 from request-id 1, and part
+    // we expect 5 entries for subcluster1 (4 from request-id 1, and part
     // of the broadcast of request-id 2
     checkExpectedAllocation(response, "subcluster1", 5, 26);
 
-    // sub-cluster 2 should contain 3 entry from request-id 1 and 1 from the
+    // sub-cluster 2 should contain 3 entries from request-id 1 and 1 from the
     // broadcast of request-id 2, and no request-id 0
     checkExpectedAllocation(response, "subcluster2", 4, 23);
 
@@ -364,28 +365,33 @@ public class TestLocalityMulticastAMRMProxyPolicy
 
     // check that the allocations that show up are what expected
     for (ResourceRequest rr : response.get(getHomeSubCluster())) {
-      Assert.assertTrue(rr.getAllocationRequestId() == 4L
+      Assert.assertTrue(
-          || rr.getAllocationRequestId() == 2L);
+          rr.getAllocationRequestId() == 2L || rr.getAllocationRequestId() == 4L
-    }
+              || rr.getAllocationRequestId() == 5L);
-
-    for (ResourceRequest rr : response.get(getHomeSubCluster())) {
-      Assert.assertTrue(rr.getAllocationRequestId() != 1L);
     }
 
     List<ResourceRequest> rrs =
         response.get(SubClusterId.newInstance("subcluster0"));
     for (ResourceRequest rr : rrs) {
       Assert.assertTrue(rr.getAllocationRequestId() != 1L);
+      Assert.assertTrue(rr.getAllocationRequestId() != 4L);
+    }
+
+    for (ResourceRequest rr : response
+        .get(SubClusterId.newInstance("subcluster1"))) {
+      Assert.assertTrue(rr.getAllocationRequestId() == 1L
+          || rr.getAllocationRequestId() == 2L);
     }
 
     for (ResourceRequest rr : response
         .get(SubClusterId.newInstance("subcluster2"))) {
-      Assert.assertTrue(rr.getAllocationRequestId() != 0L);
+      Assert.assertTrue(rr.getAllocationRequestId() == 1L
+          || rr.getAllocationRequestId() == 2L);
     }
 
     for (ResourceRequest rr : response
         .get(SubClusterId.newInstance("subcluster5"))) {
-      Assert.assertTrue(rr.getAllocationRequestId() >= 2);
+      Assert.assertTrue(rr.getAllocationRequestId() == 2);
       Assert.assertTrue(rr.getRelaxLocality());
     }
   }
@@ -555,7 +561,7 @@ public class TestLocalityMulticastAMRMProxyPolicy
     out.add(FederationPoliciesTestUtil.createResourceRequest(1L,
         "subcluster2-rack3", 1024, 1, 1, 1, null, false));
     out.add(FederationPoliciesTestUtil.createResourceRequest(1L,
-        ResourceRequest.ANY, 1024, 1, 1, 2, null, false));
+        ResourceRequest.ANY, 1024, 1, 1, 3, null, false));
 
     // create a non-local ANY request that can span anything
     out.add(FederationPoliciesTestUtil.createResourceRequest(2L,
@@ -578,6 +584,19 @@ public class TestLocalityMulticastAMRMProxyPolicy
     out.add(FederationPoliciesTestUtil.createResourceRequest(4L,
         ResourceRequest.ANY, 1024, 1, 1, 1, null, false));
 
+    // create a request of two hosts, an unknown node and a known node, both in
+    // a known rack, and expect the unknown node to show up in homesubcluster
+    out.add(FederationPoliciesTestUtil.createResourceRequest(5L,
+        "subcluster0-rack0-host0", 1024, 1, 1, 2, null, false));
+    out.add(FederationPoliciesTestUtil.createResourceRequest(5L,
+        "subcluster0-rack0", 1024, 1, 1, 2, null, false));
+    out.add(FederationPoliciesTestUtil.createResourceRequest(5L, "node4", 1024,
+        1, 1, 2, null, false));
+    out.add(FederationPoliciesTestUtil.createResourceRequest(5L, "rack2", 1024,
+        1, 1, 2, null, false));
+    out.add(FederationPoliciesTestUtil.createResourceRequest(5L,
+        ResourceRequest.ANY, 1024, 1, 1, 4, null, false));
+
     return out;
   }
 }