HADOOP-18692. User in staticPriorities cost also shouldn't be accumulated to totalDecayedCallCost and totalRawCallCost.

hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/ipc/DecayRpcScheduler.java

@@ -23,7 +23,6 @@ import java.util.ArrayList;
 import java.util.Collection;
 import java.util.Collections;
 import java.util.HashMap;
-import java.util.HashSet;
 import java.util.Iterator;
 import java.util.List;
 import java.util.Map;
@@ -197,7 +196,6 @@ public class DecayRpcScheduler implements RpcScheduler,
   private MetricsProxy metricsProxy;
   private final CostProvider costProvider;
   private final Map<String, Integer> staticPriorities = new HashMap<>();
-  private Set<String> serviceUserNames;
 
   /**
    * This TimerTask will call decayCurrentCosts until
@@ -249,7 +247,7 @@ public class DecayRpcScheduler implements RpcScheduler,
         conf);
     this.backOffResponseTimeThresholds =
         parseBackOffResponseTimeThreshold(ns, conf, numLevels);
-    this.serviceUserNames = this.parseServiceUserNames(ns, conf);
+    this.parseServiceUserNames(ns, conf);
 
     // Setup response time metrics
     responseTimeTotalInCurrWindow = new AtomicLongArray(numLevels);
@@ -406,10 +404,12 @@ public class DecayRpcScheduler implements RpcScheduler,
     return decimals;
   }
 
-  private Set<String> parseServiceUserNames(String ns, Configuration conf) {
+  private void parseServiceUserNames(String ns, Configuration conf) {
     Collection<String> collection = conf.getStringCollection(
         ns + "." + IPC_DECAYSCHEDULER_SERVICE_USERS_KEY);
-    return new HashSet<>(collection);
+    for (String user : collection) {
+      staticPriorities.put(user, -1);
+    }
   }
 
   /**
@@ -607,10 +607,6 @@ public class DecayRpcScheduler implements RpcScheduler,
    * @return scheduling decision from 0 to numLevels - 1
    */
   private int computePriorityLevel(long cost, Object identity) {
-    // The priority for service users is always 0
-    if (isServiceUser((String)identity)) {
-      return 0;
-    }
     Integer staticPriority = staticPriorities.get(identity);
     if (staticPriority != null) {
       return staticPriority.intValue();
@@ -714,7 +710,7 @@ public class DecayRpcScheduler implements RpcScheduler,
   }
 
   private boolean isServiceUser(String userName) {
-    return this.serviceUserNames.contains(userName);
+    return this.staticPriorities.getOrDefault(userName, 0) < 0;
   }
 
   @Override
@@ -816,7 +812,7 @@ public class DecayRpcScheduler implements RpcScheduler,
 
   @VisibleForTesting
   Set<String> getServiceUserNames() {
-    return serviceUserNames;
+    return staticPriorities.keySet();
   }
 
   @VisibleForTesting

hadoop-common-project/hadoop-common/src/test/java/org/apache/hadoop/ipc/TestDecayRpcScheduler.java

@@ -482,8 +482,8 @@ public class TestDecayRpcScheduler {
     String summary = scheduler.getSchedulingDecisionSummary();
     Map<String, Object> summaryMap = (Map<String, Object>) JSON.parse(summary);
     assertNotEquals(0L, summaryMap.get("user1"));
-    assertEquals(0L, summaryMap.get("service1"));
-    assertEquals(0L, summaryMap.get("service2"));
+    assertEquals(-1L, summaryMap.get("service1"));
+    assertEquals(-1L, summaryMap.get("service2"));
   }
 
   /**

hadoop-common-project/hadoop-common/src/test/java/org/apache/hadoop/ipc/TestRPC.java

@@ -22,6 +22,7 @@ import org.apache.hadoop.fs.CommonConfigurationKeysPublic;
 import org.apache.hadoop.io.retry.RetryUtils;
 import org.apache.hadoop.ipc.metrics.RpcMetrics;
 
+import org.apache.hadoop.test.Whitebox;
 import org.apache.hadoop.thirdparty.com.google.common.util.concurrent.ThreadFactoryBuilder;
 import org.apache.hadoop.thirdparty.protobuf.ServiceException;
 import org.apache.hadoop.HadoopIllegalArgumentException;
@@ -1583,17 +1584,64 @@ public class TestRPC extends TestRpcBase {
     try {
       server = setupDecayRpcSchedulerandTestServer(ns + ".");
 
-      UserGroupInformation ugi = UserGroupInformation.createRemoteUser("user");
+      UserGroupInformation ugi1 = UserGroupInformation.createRemoteUser("user");
       // normal users start with priority 0.
-      Assert.assertEquals(0, server.getPriorityLevel(ugi));
+      Assert.assertEquals(0, server.getPriorityLevel(ugi1));
       // calls for a protocol defined client will have priority of 0.
-      Assert.assertEquals(0, server.getPriorityLevel(newSchedulable(ugi)));
+      Assert.assertEquals(0, server.getPriorityLevel(newSchedulable(ugi1)));
 
       // protocol defined client will have top priority of -1.
-      ugi = UserGroupInformation.createRemoteUser("clientForProtocol");
-      Assert.assertEquals(-1, server.getPriorityLevel(ugi));
+      UserGroupInformation ugi2 = UserGroupInformation.createRemoteUser("clientForProtocol");
+      Assert.assertEquals(-1, server.getPriorityLevel(ugi2));
       // calls for a protocol defined client will have priority of 0.
-      Assert.assertEquals(0, server.getPriorityLevel(newSchedulable(ugi)));
+      Assert.assertEquals(0, server.getPriorityLevel(newSchedulable(ugi2)));
+
+      // user call
+      ugi1.doAs(new PrivilegedExceptionAction<Object>() {
+        @Override
+        public Object run() throws Exception {
+          TestRpcService proxy = getClient(addr, conf);
+          for (int i = 0; i < 10; i++) {
+            proxy.ping(null, newEmptyRequest());
+          }
+          return null;
+        }
+      });
+      // clientForProtocol call
+      ugi2.doAs(new PrivilegedExceptionAction<Object>() {
+        @Override
+        public Object run() throws Exception {
+          TestRpcService proxy = getClient(addr, conf);
+          for (int i = 0; i < 30; i++) {
+            proxy.ping(null, newEmptyRequest());
+          }
+          return null;
+        }
+      });
+
+      CallQueueManager callQueueManager =
+          (CallQueueManager) Whitebox.getInternalState(server, "callQueue");
+      DecayRpcScheduler scheduler =
+          (DecayRpcScheduler) Whitebox.getInternalState(callQueueManager, "scheduler");
+      Assert.assertNotNull(scheduler);
+
+      // test total costs.
+      assertEquals(10, scheduler.getTotalCallVolume());
+      assertEquals(10, scheduler.getTotalRawCallVolume());
+      assertEquals(30, scheduler.getTotalServiceUserCallVolume());
+      assertEquals(30, scheduler.getTotalServiceUserRawCallVolume());
+      assertEquals(1, scheduler.getPriorityLevel(newSchedulable(ugi1)));
+      assertEquals(0, scheduler.getPriorityLevel(newSchedulable(ugi2)));
+
+      // test total costs after decay.
+      scheduler.forceDecay();
+      assertEquals(5, scheduler.getTotalCallVolume());
+      assertEquals(10, scheduler.getTotalRawCallVolume());
+      assertEquals(15, scheduler.getTotalServiceUserCallVolume());
+      assertEquals(30, scheduler.getTotalServiceUserRawCallVolume());
+      assertEquals(1, scheduler.getPriorityLevel(newSchedulable(ugi1)));
+      assertEquals(0, scheduler.getPriorityLevel(newSchedulable(ugi2)));
+
     } finally {
       stop(server, null);
     }