YARN-11808. RM memory leak due to Opportunistic container request cancellation at App level.

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

@@ -36,6 +36,7 @@
 import java.util.Map;
 import java.util.Set;
 import java.util.TreeMap;
+import java.util.Objects;
 
 import static org.apache.hadoop.yarn.server.scheduler.OpportunisticContainerAllocator.Allocation;
 import static org.apache.hadoop.yarn.server.scheduler.OpportunisticContainerAllocator.AllocationParams;
@@ -132,10 +133,25 @@ public void addToOutstandingReqs(List<ResourceRequest> resourceAsks) {
       SchedulerRequestKey schedulerKey = SchedulerRequestKey.create(request);
 
       Map<Resource, EnrichedResourceRequest> reqMap =
-          outstandingOpReqs.get(schedulerKey);
+          getOutstandingOpReqs().get(schedulerKey);
+
+      if (request.getNumContainers() == 0) {
+        if (Objects.nonNull(reqMap) &&
+                ResourceRequest.isAnyLocation(request.getResourceName())) {
+          reqMap.remove(request.getCapability());
+          if (reqMap.isEmpty()) {
+            outstandingOpReqs.remove(schedulerKey);
+          }
+          continue;
+        } else if (Objects.isNull(reqMap) || Objects.isNull(
+                reqMap.get(request.getCapability()))) {
+          continue;
+        }
+      }
+
       if (reqMap == null) {
         reqMap = new HashMap<>();
-        outstandingOpReqs.put(schedulerKey, reqMap);
+        getOutstandingOpReqs().put(schedulerKey, reqMap);
       }
 
       EnrichedResourceRequest eReq = reqMap.get(request.getCapability());

hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-common/src/test/java/org/apache/hadoop/yarn/server/scheduler/TestOpportunisticContainerContext.java

@@ -0,0 +1,186 @@
+/**
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ * <p>
+ * http://www.apache.org/licenses/LICENSE-2.0
+ * <p>
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.apache.hadoop.yarn.server.scheduler;
+
+import org.apache.hadoop.yarn.api.records.Priority;
+import org.apache.hadoop.yarn.api.records.Resource;
+import org.apache.hadoop.yarn.api.records.ResourceRequest;
+
+import org.junit.Assert;
+import org.junit.Before;
+import org.junit.Test;
+import org.mockito.Mockito;
+import org.mockito.Spy;
+
+import java.util.HashMap;
+import java.util.List;
+import java.util.Map;
+import java.util.TreeMap;
+import java.util.ArrayList;
+
+/**
+ * Test cases for OpportunisticContainerContext.
+ */
+public class TestOpportunisticContainerContext {
+
+  @Spy
+  private OpportunisticContainerContext opportunisticContainerContext;
+  private Map<Resource, OpportunisticContainerAllocator.EnrichedResourceRequest> reqMap =
+          new HashMap<>();
+  private TreeMap<SchedulerRequestKey,
+          Map<Resource, OpportunisticContainerAllocator.EnrichedResourceRequest>> outstandingOpReqs;
+
+  @Before
+  public void setUp() {
+    opportunisticContainerContext = Mockito.spy(new OpportunisticContainerContext());
+    outstandingOpReqs = new TreeMap<>();
+  }
+
+  /**
+   * Resource Request - {
+   * Location = ANY
+   * No of container != 0
+   * }.
+   */
+  @Test
+  public void testAddToOutstandingReqsWithANYRequest() {
+    ResourceRequest request = getResourceRequest(ResourceRequest.ANY, 1);
+    List<ResourceRequest> resourceRequestList = new ArrayList<>();
+    resourceRequestList.add(request);
+    opportunisticContainerContext.addToOutstandingReqs(resourceRequestList);
+    Assert.assertEquals(opportunisticContainerContext.getOutstandingOpReqs().size(), 1);
+  }
+
+  /**
+   * Resource Request - {
+   * Location != ANY
+   * No of container = 0
+   * }.
+   */
+  @Test
+  public void testAddToOutstandingReqsWithZeroContainer() {
+    ResourceRequest request = getResourceRequest("resource", 0);
+    createOutstandingOpReqs(request, getResource());
+    Mockito.doReturn(outstandingOpReqs).when(opportunisticContainerContext)
+            .getOutstandingOpReqs();
+    List<ResourceRequest> resourceRequestList = new ArrayList<>();
+    resourceRequestList.add(request);
+    opportunisticContainerContext.addToOutstandingReqs(resourceRequestList);
+    Assert.assertEquals(opportunisticContainerContext.getOutstandingOpReqs().size(), 1);
+  }
+
+  /**
+   * Resource Request - [
+   * {Location != ANY, No of Container = 0}
+   * {Location = ANY, No of Container = 0}
+   * ].
+   */
+  @Test
+  public void testAddToOutstandingReqsWithZeroContainerAndMultipleSchedulerKey() {
+    ResourceRequest req1 = getResourceRequest("resource", 0);
+    ResourceRequest req2 = getResourceRequest(ResourceRequest.ANY, 0);
+    createOutstandingOpReqs(req1, getResource());
+    createOutstandingOpReqs(req2, getResource());
+    Mockito.doReturn(outstandingOpReqs).when(opportunisticContainerContext)
+            .getOutstandingOpReqs();
+    List<ResourceRequest> resourceRequestList = new ArrayList<>();
+    resourceRequestList.add(req1);
+    resourceRequestList.add(req2);
+    opportunisticContainerContext.addToOutstandingReqs(resourceRequestList);
+    Assert.assertEquals(opportunisticContainerContext.getOutstandingOpReqs().size(), 1);
+  }
+
+  /**
+   * Resource Request - [
+   * {Location != ANY, No of Container = 0}
+   * {Location = ANY, No of Container != 0}
+   * ].
+   */
+  @Test
+  public void testAddToOutstandingReqsWithMultipleSchedulerKey() {
+    ResourceRequest req1 = getResourceRequest("resource", 0);
+    ResourceRequest req2 = getResourceRequest(ResourceRequest.ANY, 1);
+    createOutstandingOpReqs(req1, getResource());
+    createOutstandingOpReqs(req2, getResource());
+    Mockito.doReturn(outstandingOpReqs).when(opportunisticContainerContext)
+            .getOutstandingOpReqs();
+    List<ResourceRequest> resourceRequestList = new ArrayList<>();
+    resourceRequestList.add(req1);
+    resourceRequestList.add(req2);
+    opportunisticContainerContext.addToOutstandingReqs(resourceRequestList);
+    Assert.assertEquals(opportunisticContainerContext.getOutstandingOpReqs().size(), 1);
+  }
+
+  /**
+   * Resource Request - {
+   * Location != ANY
+   * No of container = 0
+   * Capability = NULL
+   * }.
+   */
+  @Test
+  public void testAddToOutstandingReqsWithZeroContainerAndNullCapability() {
+    ResourceRequest request = getResourceRequestWithoutCapability();
+    createOutstandingOpReqs(request, getResource());
+    Mockito.doReturn(outstandingOpReqs).when(opportunisticContainerContext)
+            .getOutstandingOpReqs();
+    List<ResourceRequest> resourceRequestList = new ArrayList<>();
+    resourceRequestList.add(request);
+    opportunisticContainerContext.addToOutstandingReqs(resourceRequestList);
+    Assert.assertEquals(opportunisticContainerContext.getOutstandingOpReqs().size(), 1);
+  }
+
+  /**
+   * Resource Request - {
+   * Location != ANY
+   * No of container = 0
+   * Req map is NULL
+   * }.
+   */
+  @Test
+  public void testAddToOutstandingReqsWithEmptyReqMap() {
+    ResourceRequest request = getResourceRequest("resource", 0);
+    Mockito.doReturn(new TreeMap<>()).when(opportunisticContainerContext)
+            .getOutstandingOpReqs();
+    List<ResourceRequest> resourceRequestList = new ArrayList<>();
+    resourceRequestList.add(request);
+    opportunisticContainerContext.addToOutstandingReqs(resourceRequestList);
+    Assert.assertEquals(opportunisticContainerContext.getOutstandingOpReqs().size(), 0);
+  }
+
+  private void createOutstandingOpReqs(ResourceRequest req, Resource resource) {
+    SchedulerRequestKey schedulerRequestKey = SchedulerRequestKey.create(req);
+    reqMap.put(resource, new OpportunisticContainerAllocator.EnrichedResourceRequest(req));
+    outstandingOpReqs.put(schedulerRequestKey, reqMap);
+  }
+
+  private ResourceRequest getResourceRequest(String resourceName, int numContainer) {
+    return ResourceRequest.newBuilder().resourceName(resourceName).numContainers(numContainer)
+            .allocationRequestId(1).priority(Priority.newInstance(1)).capability(getResource())
+            .build();
+  }
+
+  private ResourceRequest getResourceRequestWithoutCapability() {
+    return ResourceRequest.newBuilder().resourceName("resource").numContainers(0)
+            .allocationRequestId(1).priority(Priority.newInstance(1)).build();
+  }
+
+  private Resource getResource() {
+    return Resource.newInstance(1024, 2);
+  }
+}