szilard-nemeth commented on a change in pull request #3551:
URL: https://github.com/apache/hadoop/pull/3551#discussion_r731986865



##########
File path: 
hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-resourcemanager/src/main/java/org/apache/hadoop/yarn/server/resourcemanager/scheduler/capacity/QueueAllocationSettings.java
##########
@@ -0,0 +1,97 @@
+/*
+ * 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
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ * 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.resourcemanager.scheduler.capacity;
+
+import org.apache.hadoop.yarn.api.records.Resource;
+import org.apache.hadoop.yarn.api.records.ResourceInformation;
+import org.apache.hadoop.yarn.util.resource.ResourceUtils;
+import org.apache.hadoop.yarn.util.resource.Resources;
+
+import static 
org.apache.hadoop.yarn.server.resourcemanager.scheduler.capacity.CapacitySchedulerConfiguration.UNDEFINED;
+
+/**
+ * This class determines minimum and maximum allocation settings based on the
+ * {@link CapacitySchedulerConfiguration} and other queue 
+ * properties.
+ **/
+public class QueueAllocationSettings {
+  private final Resource minimumAllocation;

Review comment:
       The original code was:
   ```
   final Resource minimumAllocation;
   volatile Resource maximumAllocation;
   ```
   I do suggest to be consistent and use volatile for both fields to be on the 
safe side.




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