diff --git a/hadoop-tools/hadoop-sls/src/test/java/org/apache/hadoop/yarn/sls/TestReservationSystemInvariants.java b/hadoop-tools/hadoop-sls/src/test/java/org/apache/hadoop/yarn/sls/TestReservationSystemInvariants.java
new file mode 100644
index 0000000000..b3a79cbc43
--- /dev/null
+++ b/hadoop-tools/hadoop-sls/src/test/java/org/apache/hadoop/yarn/sls/TestReservationSystemInvariants.java
@@ -0,0 +1,73 @@
+/**
+ * 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.sls;
+
+import java.util.Arrays;
+import java.util.Collection;
+
+import org.apache.hadoop.conf.Configuration;
+import org.apache.hadoop.yarn.conf.YarnConfiguration;
+import org.apache.hadoop.yarn.server.resourcemanager.monitor.invariants.InvariantsChecker;
+import org.apache.hadoop.yarn.server.resourcemanager.monitor.invariants.ReservationInvariantsChecker;
+import org.apache.hadoop.yarn.server.resourcemanager.scheduler.capacity.CapacityScheduler;
+import org.apache.hadoop.yarn.server.resourcemanager.scheduler.fair.FairScheduler;
+import org.junit.Test;
+import org.junit.runner.RunWith;
+import org.junit.runners.Parameterized;
+import org.junit.runners.Parameterized.Parameters;
+
+import net.jcip.annotations.NotThreadSafe;
+
+/**
+ * This test performs an SLS run enabling a
+ * {@code ReservationInvariantsChecker}.
+ */
+@RunWith(value = Parameterized.class)
+@NotThreadSafe
+public class TestReservationSystemInvariants extends BaseSLSRunnerTest {
+
+  @Parameters(name = "Testing with: {1}, {0}, (nodeFile {3})")
+  public static Collection<Object[]> data() {
+    // Test with both schedulers, and all three trace types
+    return Arrays.asList(new Object[][] {
+        {CapacityScheduler.class.getCanonicalName(), "SYNTH",
+            "src/test/resources/syn.json", null},
+        {FairScheduler.class.getCanonicalName(), "SYNTH",
+            "src/test/resources/syn.json", null}
+    });
+  }
+
+  @Test(timeout = 120000)
+  @SuppressWarnings("all")
+  public void testSimulatorRunning() throws Exception {
+
+    Configuration conf = new Configuration(false);
+    conf.set(YarnConfiguration.RM_SCHEDULER, schedulerType);
+    conf.setBoolean(YarnConfiguration.RM_SCHEDULER_ENABLE_MONITORS, true);
+    conf.set(YarnConfiguration.RM_SCHEDULER_MONITOR_POLICIES,
+        ReservationInvariantsChecker.class.getCanonicalName());
+    conf.setBoolean(InvariantsChecker.THROW_ON_VIOLATION, true);
+
+
+    long timeTillShutDownInSec = 90;
+    runSLS(conf, timeTillShutDownInSec);
+
+  }
+
+}
diff --git a/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-resourcemanager/src/main/java/org/apache/hadoop/yarn/server/resourcemanager/monitor/invariants/ReservationInvariantsChecker.java b/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-resourcemanager/src/main/java/org/apache/hadoop/yarn/server/resourcemanager/monitor/invariants/ReservationInvariantsChecker.java
new file mode 100644
index 0000000000..2f9f03e056
--- /dev/null
+++ b/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-resourcemanager/src/main/java/org/apache/hadoop/yarn/server/resourcemanager/monitor/invariants/ReservationInvariantsChecker.java
@@ -0,0 +1,63 @@
+/**
+ * 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.monitor.invariants;
+
+import org.apache.hadoop.yarn.server.resourcemanager.reservation.Plan;
+import org.apache.hadoop.yarn.util.UTCClock;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+import java.io.IOException;
+import java.util.Collection;
+
+/**
+ * Invariant checker that checks certain reservation invariants are respected.
+ */
+public class ReservationInvariantsChecker extends InvariantsChecker {
+
+  private static final Logger LOG =
+      LoggerFactory.getLogger(ReservationInvariantsChecker.class);
+
+  private UTCClock clock = new UTCClock();
+
+  @Override
+  public void editSchedule() {
+    Collection<Plan> plans =
+        getContext().getReservationSystem().getAllPlans().values();
+
+    try {
+      for (Plan plan : plans) {
+        long currReservations =
+            plan.getReservationsAtTime(clock.getTime()).size();
+        long numberReservationQueues = getContext().getScheduler()
+            .getQueueInfo(plan.getQueueName(), true, false).getChildQueues()
+            .size();
+        if (currReservations != numberReservationQueues - 1) {
+          logOrThrow("Number of reservations (" + currReservations
+              + ") does NOT match the number of reservationQueues ("
+              + (numberReservationQueues - 1) + "), while it should.");
+        }
+      }
+    } catch (IOException io) {
+      throw new InvariantViolationException("Issue during invariant check: ",
+          io);
+    }
+
+  }
+
+}