YARN-6575. Support global configuration mutation in MutableConfProvider. (Jonathan Hung via Xuan Gong)

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

@@ -21,7 +21,7 @@
 import org.apache.hadoop.conf.Configuration;
 import org.apache.hadoop.security.UserGroupInformation;
 import org.apache.hadoop.yarn.server.resourcemanager.RMContext;
-import org.apache.hadoop.yarn.server.resourcemanager.webapp.dao.QueueConfigsUpdateInfo;
+import org.apache.hadoop.yarn.server.resourcemanager.webapp.dao.SchedConfUpdateInfo;
 
 /**
  * Interface for determining whether configuration mutations are allowed.
@@ -41,7 +41,7 @@ public interface ConfigurationMutationACLPolicy {
    * @param confUpdate configurations to be updated
    * @return whether provided mutation is allowed or not
    */
-  boolean isMutationAllowed(UserGroupInformation user, QueueConfigsUpdateInfo
+  boolean isMutationAllowed(UserGroupInformation user, SchedConfUpdateInfo
       confUpdate);
 
 }

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

@@ -22,7 +22,7 @@
 import org.apache.hadoop.security.UserGroupInformation;
 import org.apache.hadoop.yarn.security.YarnAuthorizationProvider;
 import org.apache.hadoop.yarn.server.resourcemanager.RMContext;
-import org.apache.hadoop.yarn.server.resourcemanager.webapp.dao.QueueConfigsUpdateInfo;
+import org.apache.hadoop.yarn.server.resourcemanager.webapp.dao.SchedConfUpdateInfo;
 
 /**
  * Default configuration mutation ACL policy. Checks if user is YARN admin.
@@ -39,7 +39,7 @@ public void init(Configuration conf, RMContext rmContext) {
 
   @Override
   public boolean isMutationAllowed(UserGroupInformation user,
-      QueueConfigsUpdateInfo confUpdate) {
+      SchedConfUpdateInfo confUpdate) {
     return authorizer.isAdmin(user);
   }
 }

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

@@ -19,7 +19,7 @@
 
 import org.apache.hadoop.conf.Configuration;
 import org.apache.hadoop.security.UserGroupInformation;
-import org.apache.hadoop.yarn.server.resourcemanager.webapp.dao.QueueConfigsUpdateInfo;
+import org.apache.hadoop.yarn.server.resourcemanager.webapp.dao.SchedConfUpdateInfo;
 
 import java.io.IOException;
 
@@ -36,7 +36,7 @@ public interface MutableConfScheduler extends ResourceScheduler {
    * @throws IOException if update is invalid
    */
   void updateConfiguration(UserGroupInformation user,
-      QueueConfigsUpdateInfo confUpdate) throws IOException;
+      SchedConfUpdateInfo confUpdate) throws IOException;
 
   /**
    * Get the scheduler configuration.

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

@@ -19,7 +19,7 @@
 package org.apache.hadoop.yarn.server.resourcemanager.scheduler;
 
 import org.apache.hadoop.security.UserGroupInformation;
-import org.apache.hadoop.yarn.server.resourcemanager.webapp.dao.QueueConfigsUpdateInfo;
+import org.apache.hadoop.yarn.server.resourcemanager.webapp.dao.SchedConfUpdateInfo;
 
 import java.io.IOException;
 
@@ -34,7 +34,7 @@ public interface MutableConfigurationProvider {
    * @param confUpdate Key-value pairs for configurations to be updated.
    * @throws IOException if scheduler could not be reinitialized
    */
-  void mutateConfiguration(UserGroupInformation user, QueueConfigsUpdateInfo
+  void mutateConfiguration(UserGroupInformation user, SchedConfUpdateInfo
       confUpdate) throws IOException;
 
 }

hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-resourcemanager/src/main/java/org/apache/hadoop/yarn/server/resourcemanager/scheduler/capacity/CapacityScheduler.java

@@ -137,7 +137,7 @@
 import org.apache.hadoop.yarn.server.resourcemanager.scheduler.placement.SimplePlacementSet;
 import org.apache.hadoop.yarn.server.resourcemanager.security.AppPriorityACLsManager;
 import org.apache.hadoop.yarn.server.resourcemanager.security.RMContainerTokenSecretManager;
-import org.apache.hadoop.yarn.server.resourcemanager.webapp.dao.QueueConfigsUpdateInfo;
+import org.apache.hadoop.yarn.server.resourcemanager.webapp.dao.SchedConfUpdateInfo;
 import org.apache.hadoop.yarn.server.utils.Lock;
 import org.apache.hadoop.yarn.util.resource.DefaultResourceCalculator;
 import org.apache.hadoop.yarn.util.resource.ResourceCalculator;
@@ -2617,7 +2617,7 @@ public long getMaximumApplicationLifetime(String queueName) {
 
   @Override
   public void updateConfiguration(UserGroupInformation user,
-      QueueConfigsUpdateInfo confUpdate) throws IOException {
+      SchedConfUpdateInfo confUpdate) throws IOException {
     if (csConfProvider instanceof MutableConfigurationProvider) {
       ((MutableConfigurationProvider) csConfProvider).mutateConfiguration(
           user, confUpdate);

hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-resourcemanager/src/main/java/org/apache/hadoop/yarn/server/resourcemanager/scheduler/capacity/conf/MutableCSConfigurationProvider.java

@@ -32,7 +32,7 @@
 import org.apache.hadoop.yarn.server.resourcemanager.scheduler.capacity.CapacitySchedulerConfiguration;
 import org.apache.hadoop.yarn.server.resourcemanager.scheduler.capacity.conf.YarnConfigurationStore.LogMutation;
 import org.apache.hadoop.yarn.server.resourcemanager.webapp.dao.QueueConfigInfo;
-import org.apache.hadoop.yarn.server.resourcemanager.webapp.dao.QueueConfigsUpdateInfo;
+import org.apache.hadoop.yarn.server.resourcemanager.webapp.dao.SchedConfUpdateInfo;
 
 import java.io.IOException;
 import java.util.ArrayList;
@@ -98,7 +98,7 @@ public CapacitySchedulerConfiguration loadConfiguration(Configuration
 
   @Override
   public void mutateConfiguration(UserGroupInformation user,
-      QueueConfigsUpdateInfo confUpdate) throws IOException {
+      SchedConfUpdateInfo confUpdate) throws IOException {
     if (!aclMutationPolicy.isMutationAllowed(user, confUpdate)) {
       throw new AccessControlException("User is not admin of all modified" +
           " queues.");
@@ -126,7 +126,7 @@ public void mutateConfiguration(UserGroupInformation user,
 
 
   private Map<String, String> constructKeyValueConfUpdate(
-      QueueConfigsUpdateInfo mutationInfo) throws IOException {
+      SchedConfUpdateInfo mutationInfo) throws IOException {
     CapacityScheduler cs = (CapacityScheduler) rmContext.getScheduler();
     CapacitySchedulerConfiguration proposedConf =
         new CapacitySchedulerConfiguration(cs.getConfiguration(), false);
@@ -140,6 +140,10 @@ private Map<String, String> constructKeyValueConfUpdate(
     for (QueueConfigInfo updateQueueInfo : mutationInfo.getUpdateQueueInfo()) {
       updateQueue(updateQueueInfo, proposedConf, confUpdate);
     }
+    for (Map.Entry<String, String> global : mutationInfo.getGlobalParams()
+        .entrySet()) {
+      confUpdate.put(global.getKey(), global.getValue());
+    }
     return confUpdate;
   }
 

hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-resourcemanager/src/main/java/org/apache/hadoop/yarn/server/resourcemanager/scheduler/capacity/conf/QueueAdminConfigurationMutationACLPolicy.java

@@ -22,15 +22,17 @@
 import org.apache.hadoop.security.UserGroupInformation;
 import org.apache.hadoop.yarn.api.records.QueueACL;
 import org.apache.hadoop.yarn.api.records.QueueInfo;
+import org.apache.hadoop.yarn.security.YarnAuthorizationProvider;
 import org.apache.hadoop.yarn.server.resourcemanager.RMContext;
 import org.apache.hadoop.yarn.server.resourcemanager.scheduler.ConfigurationMutationACLPolicy;
 import org.apache.hadoop.yarn.server.resourcemanager.scheduler.MutableConfScheduler;
 import org.apache.hadoop.yarn.server.resourcemanager.scheduler.Queue;
 import org.apache.hadoop.yarn.server.resourcemanager.webapp.dao.QueueConfigInfo;
-import org.apache.hadoop.yarn.server.resourcemanager.webapp.dao.QueueConfigsUpdateInfo;
+import org.apache.hadoop.yarn.server.resourcemanager.webapp.dao.SchedConfUpdateInfo;
 
 import java.io.IOException;
 import java.util.HashSet;
+import java.util.Map;
 import java.util.Set;
 
 /**
@@ -40,16 +42,29 @@
 public class QueueAdminConfigurationMutationACLPolicy implements
     ConfigurationMutationACLPolicy {
 
+  private Configuration conf;
   private RMContext rmContext;
+  private YarnAuthorizationProvider authorizer;
 
   @Override
-  public void init(Configuration conf, RMContext context) {
+  public void init(Configuration config, RMContext context) {
+    this.conf = config;
     this.rmContext = context;
+    this.authorizer = YarnAuthorizationProvider.getInstance(conf);
   }
 
   @Override
   public boolean isMutationAllowed(UserGroupInformation user,
-      QueueConfigsUpdateInfo confUpdate) {
+      SchedConfUpdateInfo confUpdate) {
+    // If there are global config changes, check if user is admin.
+    Map<String, String> globalParams = confUpdate.getGlobalParams();
+    if (globalParams != null && globalParams.size() != 0) {
+      if (!authorizer.isAdmin(user)) {
+        return false;
+      }
+    }
+
+    // Check if user is admin of all modified queues.
     Set<String> queues = new HashSet<>();
     for (QueueConfigInfo addQueueInfo : confUpdate.getAddQueueInfo()) {
       queues.add(addQueueInfo.getQueue());
@@ -71,7 +86,6 @@ public boolean isMutationAllowed(UserGroupInformation user,
         // Queue is not found, do nothing.
       }
       String parentPath = queuePath;
-      // TODO: handle global config change.
       while (queueInfo == null) {
         // We are adding a queue (whose parent we are possibly also adding).
         // Check ACL of lowest parent queue which already exists.

hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-resourcemanager/src/main/java/org/apache/hadoop/yarn/server/resourcemanager/webapp/RMWebServices.java

@@ -2459,11 +2459,11 @@ protected List<ContainerReport> getContainersReport(
   }
 
   @PUT
-  @Path("/queues")
+  @Path("/sched-conf")
   @Produces({ MediaType.APPLICATION_JSON + "; " + JettyUtils.UTF_8,
       MediaType.APPLICATION_XML + "; " + JettyUtils.UTF_8 })
   @Consumes({ MediaType.APPLICATION_JSON, MediaType.APPLICATION_XML })
-  public Response updateSchedulerConfiguration(QueueConfigsUpdateInfo
+  public Response updateSchedulerConfiguration(SchedConfUpdateInfo
       mutationInfo, @Context HttpServletRequest hsr)
       throws AuthorizationException, InterruptedException {
     init();

hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-resourcemanager/src/main/java/org/apache/hadoop/yarn/server/resourcemanager/webapp/dao/SchedConfUpdateInfo.java

@@ -19,30 +19,34 @@
 package org.apache.hadoop.yarn.server.resourcemanager.webapp.dao;
 
 import java.util.ArrayList;
+import java.util.HashMap;
 
 import javax.xml.bind.annotation.XmlAccessType;
 import javax.xml.bind.annotation.XmlAccessorType;
 import javax.xml.bind.annotation.XmlElement;
+import javax.xml.bind.annotation.XmlElementWrapper;
 import javax.xml.bind.annotation.XmlRootElement;
 
 /**
  * Information for making scheduler configuration changes (supports adding,
- * removing, or updating a queue).
+ * removing, or updating a queue, as well as global scheduler conf changes).
  */
 @XmlRootElement(name = "schedConf")
 @XmlAccessorType(XmlAccessType.FIELD)
-public class QueueConfigsUpdateInfo {
+public class SchedConfUpdateInfo {
 
-  @XmlElement(name = "add")
+  @XmlElement(name = "add-queue")
   private ArrayList<QueueConfigInfo> addQueueInfo = new ArrayList<>();
 
-  @XmlElement(name = "remove")
+  @XmlElement(name = "remove-queue")
   private ArrayList<String> removeQueueInfo = new ArrayList<>();
 
-  @XmlElement(name = "update")
+  @XmlElement(name = "update-queue")
   private ArrayList<QueueConfigInfo> updateQueueInfo = new ArrayList<>();
 
-  public QueueConfigsUpdateInfo() {
+  private HashMap<String, String> global = new HashMap<>();
+
+  public SchedConfUpdateInfo() {
     // JAXB needs this
   }
 
@@ -57,4 +61,9 @@ public ArrayList<String> getRemoveQueueInfo() {
   public ArrayList<QueueConfigInfo> getUpdateQueueInfo() {
     return updateQueueInfo;
   }
+
+  @XmlElementWrapper(name = "global-updates")
+  public HashMap<String, String> getGlobalParams() {
+    return global;
+  }
 }

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

@@ -26,7 +26,7 @@
 import org.apache.hadoop.yarn.server.resourcemanager.RMContext;
 import org.apache.hadoop.yarn.server.resourcemanager.scheduler.capacity.conf.QueueAdminConfigurationMutationACLPolicy;
 import org.apache.hadoop.yarn.server.resourcemanager.webapp.dao.QueueConfigInfo;
-import org.apache.hadoop.yarn.server.resourcemanager.webapp.dao.QueueConfigsUpdateInfo;
+import org.apache.hadoop.yarn.server.resourcemanager.webapp.dao.SchedConfUpdateInfo;
 import org.junit.Before;
 import org.junit.Test;
 
@@ -77,6 +77,7 @@ private void mockQueue(String queueName, MutableConfScheduler scheduler)
         .thenReturn(false);
     when(scheduler.getQueue(eq(queueName))).thenReturn(queue);
   }
+
   @Test
   public void testDefaultPolicy() {
     Configuration conf = new Configuration();
@@ -98,7 +99,7 @@ public void testQueueAdminBasedPolicy() {
         ConfigurationMutationACLPolicy.class);
     policy = ConfigurationMutationACLPolicyFactory.getPolicy(conf);
     policy.init(conf, rmContext);
-    QueueConfigsUpdateInfo updateInfo = new QueueConfigsUpdateInfo();
+    SchedConfUpdateInfo updateInfo = new SchedConfUpdateInfo();
     QueueConfigInfo configInfo = new QueueConfigInfo("root.a", EMPTY_MAP);
     updateInfo.getUpdateQueueInfo().add(configInfo);
     assertTrue(policy.isMutationAllowed(GOOD_USER, updateInfo));
@@ -114,7 +115,7 @@ public void testQueueAdminPolicyAddQueue() {
     policy = ConfigurationMutationACLPolicyFactory.getPolicy(conf);
     policy.init(conf, rmContext);
     // Add root.b.b1. Should check ACL of root.b queue.
-    QueueConfigsUpdateInfo updateInfo = new QueueConfigsUpdateInfo();
+    SchedConfUpdateInfo updateInfo = new SchedConfUpdateInfo();
     QueueConfigInfo configInfo = new QueueConfigInfo("root.b.b2", EMPTY_MAP);
     updateInfo.getAddQueueInfo().add(configInfo);
     assertTrue(policy.isMutationAllowed(GOOD_USER, updateInfo));
@@ -130,7 +131,7 @@ public void testQueueAdminPolicyAddNestedQueue() {
     policy = ConfigurationMutationACLPolicyFactory.getPolicy(conf);
     policy.init(conf, rmContext);
     // Add root.b.b1.b11. Should check ACL of root.b queue.
-    QueueConfigsUpdateInfo updateInfo = new QueueConfigsUpdateInfo();
+    SchedConfUpdateInfo updateInfo = new SchedConfUpdateInfo();
     QueueConfigInfo configInfo = new QueueConfigInfo("root.b.b2.b21", EMPTY_MAP);
     updateInfo.getAddQueueInfo().add(configInfo);
     assertTrue(policy.isMutationAllowed(GOOD_USER, updateInfo));
@@ -146,9 +147,26 @@ public void testQueueAdminPolicyRemoveQueue() {
     policy = ConfigurationMutationACLPolicyFactory.getPolicy(conf);
     policy.init(conf, rmContext);
     // Remove root.b.b1.
-    QueueConfigsUpdateInfo updateInfo = new QueueConfigsUpdateInfo();
+    SchedConfUpdateInfo updateInfo = new SchedConfUpdateInfo();
     updateInfo.getRemoveQueueInfo().add("root.b.b1");
     assertTrue(policy.isMutationAllowed(GOOD_USER, updateInfo));
     assertFalse(policy.isMutationAllowed(BAD_USER, updateInfo));
   }
+
+  @Test
+  public void testQueueAdminPolicyGlobal() {
+    Configuration conf = new Configuration();
+    conf.set(YarnConfiguration.YARN_ADMIN_ACL, GOOD_USER.getShortUserName());
+    conf.setClass(YarnConfiguration.RM_SCHEDULER_MUTATION_ACL_POLICY_CLASS,
+        QueueAdminConfigurationMutationACLPolicy.class,
+        ConfigurationMutationACLPolicy.class);
+    policy = ConfigurationMutationACLPolicyFactory.getPolicy(conf);
+    policy.init(conf, rmContext);
+    SchedConfUpdateInfo updateInfo = new SchedConfUpdateInfo();
+    assertTrue(policy.isMutationAllowed(GOOD_USER, updateInfo));
+    assertTrue(policy.isMutationAllowed(BAD_USER, updateInfo));
+    updateInfo.getGlobalParams().put("globalKey", "globalValue");
+    assertTrue(policy.isMutationAllowed(GOOD_USER, updateInfo));
+    assertFalse(policy.isMutationAllowed(BAD_USER, updateInfo));
+  }
 }

hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-resourcemanager/src/test/java/org/apache/hadoop/yarn/server/resourcemanager/scheduler/capacity/conf/TestMutableCSConfigurationProvider.java

@@ -24,7 +24,7 @@
 import org.apache.hadoop.yarn.server.resourcemanager.scheduler.capacity.CapacityScheduler;
 import org.apache.hadoop.yarn.server.resourcemanager.scheduler.capacity.CapacitySchedulerConfiguration;
 import org.apache.hadoop.yarn.server.resourcemanager.webapp.dao.QueueConfigInfo;
-import org.apache.hadoop.yarn.server.resourcemanager.webapp.dao.QueueConfigsUpdateInfo;
+import org.apache.hadoop.yarn.server.resourcemanager.webapp.dao.SchedConfUpdateInfo;
 import org.junit.Before;
 import org.junit.Test;
 
@@ -47,8 +47,8 @@ public class TestMutableCSConfigurationProvider {
 
   private MutableCSConfigurationProvider confProvider;
   private RMContext rmContext;
-  private QueueConfigsUpdateInfo goodUpdate;
+  private SchedConfUpdateInfo goodUpdate;
-  private QueueConfigsUpdateInfo badUpdate;
+  private SchedConfUpdateInfo badUpdate;
   private CapacityScheduler cs;
 
   private static final UserGroupInformation TEST_USER = UserGroupInformation
@@ -62,14 +62,14 @@ public void setUp() {
     when(cs.getConfiguration()).thenReturn(
         new CapacitySchedulerConfiguration());
     confProvider = new MutableCSConfigurationProvider(rmContext);
-    goodUpdate = new QueueConfigsUpdateInfo();
+    goodUpdate = new SchedConfUpdateInfo();
     Map<String, String> goodUpdateMap = new HashMap<>();
     goodUpdateMap.put("goodKey", "goodVal");
     QueueConfigInfo goodUpdateInfo = new
         QueueConfigInfo("root.a", goodUpdateMap);
     goodUpdate.getUpdateQueueInfo().add(goodUpdateInfo);
 
-    badUpdate = new QueueConfigsUpdateInfo();
+    badUpdate = new SchedConfUpdateInfo();
     Map<String, String> badUpdateMap = new HashMap<>();
     badUpdateMap.put("badKey", "badVal");
     QueueConfigInfo badUpdateInfo = new

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

@@ -36,7 +36,7 @@
 import org.apache.hadoop.yarn.server.resourcemanager.scheduler.capacity.CapacityScheduler;
 import org.apache.hadoop.yarn.server.resourcemanager.scheduler.capacity.CapacitySchedulerConfiguration;
 import org.apache.hadoop.yarn.server.resourcemanager.webapp.dao.QueueConfigInfo;
-import org.apache.hadoop.yarn.server.resourcemanager.webapp.dao.QueueConfigsUpdateInfo;
+import org.apache.hadoop.yarn.server.resourcemanager.webapp.dao.SchedConfUpdateInfo;
 import org.apache.hadoop.yarn.webapp.GenericExceptionHandler;
 import org.apache.hadoop.yarn.webapp.GuiceServletConfig;
 import org.apache.hadoop.yarn.webapp.JerseyTestBase;
@@ -162,7 +162,7 @@ public void testAddNestedQueue() throws Exception {
     ClientResponse response;
 
     // Add parent queue root.d with two children d1 and d2.
-    QueueConfigsUpdateInfo updateInfo = new QueueConfigsUpdateInfo();
+    SchedConfUpdateInfo updateInfo = new SchedConfUpdateInfo();
     Map<String, String> d1Capacity = new HashMap<>();
     d1Capacity.put(CapacitySchedulerConfiguration.CAPACITY, "25");
     d1Capacity.put(CapacitySchedulerConfiguration.MAXIMUM_CAPACITY, "25");
@@ -181,9 +181,9 @@ public void testAddNestedQueue() throws Exception {
     updateInfo.getAddQueueInfo().add(d);
     response =
         r.path("ws").path("v1").path("cluster")
-            .path("queues").queryParam("user.name", userName)
+            .path("sched-conf").queryParam("user.name", userName)
             .accept(MediaType.APPLICATION_JSON)
-            .entity(toJson(updateInfo, QueueConfigsUpdateInfo.class),
+            .entity(toJson(updateInfo, SchedConfUpdateInfo.class),
                 MediaType.APPLICATION_JSON)
             .put(ClientResponse.class);
 
@@ -205,7 +205,7 @@ public void testAddWithUpdate() throws Exception {
     ClientResponse response;
 
     // Add root.d with capacity 25, reducing root.b capacity from 75 to 50.
-    QueueConfigsUpdateInfo updateInfo = new QueueConfigsUpdateInfo();
+    SchedConfUpdateInfo updateInfo = new SchedConfUpdateInfo();
     Map<String, String> dCapacity = new HashMap<>();
     dCapacity.put(CapacitySchedulerConfiguration.CAPACITY, "25");
     Map<String, String> bCapacity = new HashMap<>();
@@ -216,9 +216,9 @@ public void testAddWithUpdate() throws Exception {
     updateInfo.getUpdateQueueInfo().add(b);
     response =
         r.path("ws").path("v1").path("cluster")
-            .path("queues").queryParam("user.name", userName)
+            .path("sched-conf").queryParam("user.name", userName)
             .accept(MediaType.APPLICATION_JSON)
-            .entity(toJson(updateInfo, QueueConfigsUpdateInfo.class),
+            .entity(toJson(updateInfo, SchedConfUpdateInfo.class),
                 MediaType.APPLICATION_JSON)
             .put(ClientResponse.class);
 
@@ -238,13 +238,13 @@ public void testRemoveQueue() throws Exception {
 
     stopQueue("root.a.a2");
     // Remove root.a.a2
-    QueueConfigsUpdateInfo updateInfo = new QueueConfigsUpdateInfo();
+    SchedConfUpdateInfo updateInfo = new SchedConfUpdateInfo();
     updateInfo.getRemoveQueueInfo().add("root.a.a2");
     response =
         r.path("ws").path("v1").path("cluster")
-            .path("queues").queryParam("user.name", userName)
+            .path("sched-conf").queryParam("user.name", userName)
             .accept(MediaType.APPLICATION_JSON)
-            .entity(toJson(updateInfo, QueueConfigsUpdateInfo.class),
+            .entity(toJson(updateInfo, SchedConfUpdateInfo.class),
                 MediaType.APPLICATION_JSON)
             .put(ClientResponse.class);
 
@@ -263,13 +263,13 @@ public void testRemoveParentQueue() throws Exception {
 
     stopQueue("root.c", "root.c.c1");
     // Remove root.c (parent queue)
-    QueueConfigsUpdateInfo updateInfo = new QueueConfigsUpdateInfo();
+    SchedConfUpdateInfo updateInfo = new SchedConfUpdateInfo();
     updateInfo.getRemoveQueueInfo().add("root.c");
     response =
         r.path("ws").path("v1").path("cluster")
-            .path("queues").queryParam("user.name", userName)
+            .path("sched-conf").queryParam("user.name", userName)
             .accept(MediaType.APPLICATION_JSON)
-            .entity(toJson(updateInfo, QueueConfigsUpdateInfo.class),
+            .entity(toJson(updateInfo, SchedConfUpdateInfo.class),
                 MediaType.APPLICATION_JSON)
             .put(ClientResponse.class);
 
@@ -288,7 +288,7 @@ public void testRemoveParentQueueWithCapacity() throws Exception {
 
     stopQueue("root.a", "root.a.a1", "root.a.a2");
     // Remove root.a (parent queue) with capacity 25
-    QueueConfigsUpdateInfo updateInfo = new QueueConfigsUpdateInfo();
+    SchedConfUpdateInfo updateInfo = new SchedConfUpdateInfo();
     updateInfo.getRemoveQueueInfo().add("root.a");
 
     // Set root.b capacity to 100
@@ -298,9 +298,9 @@ public void testRemoveParentQueueWithCapacity() throws Exception {
     updateInfo.getUpdateQueueInfo().add(b);
     response =
         r.path("ws").path("v1").path("cluster")
-            .path("queues").queryParam("user.name", userName)
+            .path("sched-conf").queryParam("user.name", userName)
             .accept(MediaType.APPLICATION_JSON)
-            .entity(toJson(updateInfo, QueueConfigsUpdateInfo.class),
+            .entity(toJson(updateInfo, SchedConfUpdateInfo.class),
                 MediaType.APPLICATION_JSON)
             .put(ClientResponse.class);
 
@@ -320,7 +320,7 @@ public void testRemoveMultipleQueues() throws Exception {
 
     stopQueue("root.b", "root.c", "root.c.c1");
     // Remove root.b and root.c
-    QueueConfigsUpdateInfo updateInfo = new QueueConfigsUpdateInfo();
+    SchedConfUpdateInfo updateInfo = new SchedConfUpdateInfo();
     updateInfo.getRemoveQueueInfo().add("root.b");
     updateInfo.getRemoveQueueInfo().add("root.c");
     Map<String, String> aCapacity = new HashMap<>();
@@ -330,9 +330,9 @@ public void testRemoveMultipleQueues() throws Exception {
     updateInfo.getUpdateQueueInfo().add(configInfo);
     response =
         r.path("ws").path("v1").path("cluster")
-            .path("queues").queryParam("user.name", userName)
+            .path("sched-conf").queryParam("user.name", userName)
             .accept(MediaType.APPLICATION_JSON)
-            .entity(toJson(updateInfo, QueueConfigsUpdateInfo.class),
+            .entity(toJson(updateInfo, SchedConfUpdateInfo.class),
                 MediaType.APPLICATION_JSON)
             .put(ClientResponse.class);
 
@@ -348,7 +348,7 @@ private void stopQueue(String... queuePaths) throws Exception {
     ClientResponse response;
 
     // Set state of queues to STOPPED.
-    QueueConfigsUpdateInfo updateInfo = new QueueConfigsUpdateInfo();
+    SchedConfUpdateInfo updateInfo = new SchedConfUpdateInfo();
     Map<String, String> stoppedParam = new HashMap<>();
     stoppedParam.put(CapacitySchedulerConfiguration.STATE,
         QueueState.STOPPED.toString());
@@ -358,9 +358,9 @@ private void stopQueue(String... queuePaths) throws Exception {
     }
     response =
         r.path("ws").path("v1").path("cluster")
-            .path("queues").queryParam("user.name", userName)
+            .path("sched-conf").queryParam("user.name", userName)
             .accept(MediaType.APPLICATION_JSON)
-            .entity(toJson(updateInfo, QueueConfigsUpdateInfo.class),
+            .entity(toJson(updateInfo, SchedConfUpdateInfo.class),
                 MediaType.APPLICATION_JSON)
             .put(ClientResponse.class);
     assertEquals(Status.OK.getStatusCode(), response.getStatus());
@@ -378,7 +378,7 @@ public void testUpdateQueue() throws Exception {
     ClientResponse response;
 
     // Update config value.
-    QueueConfigsUpdateInfo updateInfo = new QueueConfigsUpdateInfo();
+    SchedConfUpdateInfo updateInfo = new SchedConfUpdateInfo();
     Map<String, String> updateParam = new HashMap<>();
     updateParam.put(CapacitySchedulerConfiguration.MAXIMUM_AM_RESOURCE_SUFFIX,
         "0.2");
@@ -393,9 +393,9 @@ public void testUpdateQueue() throws Exception {
         0.001f);
     response =
         r.path("ws").path("v1").path("cluster")
-            .path("queues").queryParam("user.name", userName)
+            .path("sched-conf").queryParam("user.name", userName)
             .accept(MediaType.APPLICATION_JSON)
-            .entity(toJson(updateInfo, QueueConfigsUpdateInfo.class),
+            .entity(toJson(updateInfo, SchedConfUpdateInfo.class),
                 MediaType.APPLICATION_JSON)
             .put(ClientResponse.class);
     assertEquals(Status.OK.getStatusCode(), response.getStatus());
@@ -411,9 +411,9 @@ public void testUpdateQueue() throws Exception {
     updateInfo.getUpdateQueueInfo().add(aUpdateInfo);
     response =
         r.path("ws").path("v1").path("cluster")
-            .path("queues").queryParam("user.name", userName)
+            .path("sched-conf").queryParam("user.name", userName)
             .accept(MediaType.APPLICATION_JSON)
-            .entity(toJson(updateInfo, QueueConfigsUpdateInfo.class),
+            .entity(toJson(updateInfo, SchedConfUpdateInfo.class),
                 MediaType.APPLICATION_JSON)
             .put(ClientResponse.class);
     assertEquals(Status.OK.getStatusCode(), response.getStatus());
@@ -431,7 +431,7 @@ public void testUpdateQueueCapacity() throws Exception {
     ClientResponse response;
 
     // Update root.a and root.b capacity to 50.
-    QueueConfigsUpdateInfo updateInfo = new QueueConfigsUpdateInfo();
+    SchedConfUpdateInfo updateInfo = new SchedConfUpdateInfo();
     Map<String, String> updateParam = new HashMap<>();
     updateParam.put(CapacitySchedulerConfiguration.CAPACITY, "50");
     QueueConfigInfo aUpdateInfo = new QueueConfigInfo("root.a", updateParam);
@@ -441,9 +441,9 @@ public void testUpdateQueueCapacity() throws Exception {
 
     response =
         r.path("ws").path("v1").path("cluster")
-            .path("queues").queryParam("user.name", userName)
+            .path("sched-conf").queryParam("user.name", userName)
             .accept(MediaType.APPLICATION_JSON)
-            .entity(toJson(updateInfo, QueueConfigsUpdateInfo.class),
+            .entity(toJson(updateInfo, SchedConfUpdateInfo.class),
                 MediaType.APPLICATION_JSON)
             .put(ClientResponse.class);
     assertEquals(Status.OK.getStatusCode(), response.getStatus());
@@ -453,6 +453,47 @@ public void testUpdateQueueCapacity() throws Exception {
     assertEquals(50.0f, newCSConf.getNonLabeledQueueCapacity("root.b"), 0.01f);
   }
 
+  @Test
+  public void testGlobalConfChange() throws Exception {
+    WebResource r = resource();
+
+    ClientResponse response;
+
+    // Set maximum-applications to 30000.
+    SchedConfUpdateInfo updateInfo = new SchedConfUpdateInfo();
+    updateInfo.getGlobalParams().put(CapacitySchedulerConfiguration.PREFIX +
+        "maximum-applications", "30000");
+
+    response =
+        r.path("ws").path("v1").path("cluster")
+            .path("sched-conf").queryParam("user.name", userName)
+            .accept(MediaType.APPLICATION_JSON)
+            .entity(toJson(updateInfo, SchedConfUpdateInfo.class),
+                MediaType.APPLICATION_JSON)
+            .put(ClientResponse.class);
+    assertEquals(Status.OK.getStatusCode(), response.getStatus());
+    CapacitySchedulerConfiguration newCSConf =
+        ((CapacityScheduler) rm.getResourceScheduler()).getConfiguration();
+    assertEquals(30000, newCSConf.getMaximumSystemApplications());
+
+    updateInfo.getGlobalParams().put(CapacitySchedulerConfiguration.PREFIX +
+        "maximum-applications", null);
+    // Unset maximum-applications. Should be set to default.
+    response =
+        r.path("ws").path("v1").path("cluster")
+            .path("sched-conf").queryParam("user.name", userName)
+            .accept(MediaType.APPLICATION_JSON)
+            .entity(toJson(updateInfo, SchedConfUpdateInfo.class),
+                MediaType.APPLICATION_JSON)
+            .put(ClientResponse.class);
+    assertEquals(Status.OK.getStatusCode(), response.getStatus());
+    newCSConf =
+        ((CapacityScheduler) rm.getResourceScheduler()).getConfiguration();
+    assertEquals(CapacitySchedulerConfiguration
+        .DEFAULT_MAXIMUM_SYSTEM_APPLICATIIONS,
+        newCSConf.getMaximumSystemApplications());
+  }
+
   @Override
   @After
   public void tearDown() throws Exception {