From f2202f799090b729a90b244200c4fe5d081ab919 Mon Sep 17 00:00:00 2001
From: Ahmed Hussein <ahussein@apache.org>
Date: Wed, 29 May 2019 11:24:08 -0500
Subject: [PATCH] YARN-9563. Resource report REST API could return NaN or Inf
 (Ahmed Hussein via jeagles)

Signed-off-by: Jonathan Eagles <jeagles@gmail.com>
(cherry picked from commit abf76ac371e4611c8eb371736b433e3d89c9d2ae)
---
 .../scheduler/SchedulerApplicationAttempt.java         |  7 ++++---
 .../scheduler/TestSchedulerApplicationAttempt.java     |  2 +-
 .../scheduler/capacity/TestLeafQueue.java              | 10 ++++++++++
 3 files changed, 15 insertions(+), 4 deletions(-)

diff --git a/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-resourcemanager/src/main/java/org/apache/hadoop/yarn/server/resourcemanager/scheduler/SchedulerApplicationAttempt.java b/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-resourcemanager/src/main/java/org/apache/hadoop/yarn/server/resourcemanager/scheduler/SchedulerApplicationAttempt.java
index 767df6d0ad4..3e78220c810 100644
--- a/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-resourcemanager/src/main/java/org/apache/hadoop/yarn/server/resourcemanager/scheduler/SchedulerApplicationAttempt.java
+++ b/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-resourcemanager/src/main/java/org/apache/hadoop/yarn/server/resourcemanager/scheduler/SchedulerApplicationAttempt.java
@@ -1124,9 +1124,10 @@ public class SchedulerApplicationAttempt implements SchedulableEntity {
       if (!calc.isInvalidDivisor(cluster)) {
         float queueCapacityPerc = queue.getQueueInfo(false, false)
             .getCapacity();
-        if (queueCapacityPerc != 0) {
-          queueUsagePerc = calc.divide(cluster, usedResourceClone,
-              Resources.multiply(cluster, queueCapacityPerc)) * 100;
+        queueUsagePerc = calc.divide(cluster, usedResourceClone,
+            Resources.multiply(cluster, queueCapacityPerc)) * 100;
+        if (Float.isNaN(queueUsagePerc) || Float.isInfinite(queueUsagePerc)) {
+          queueUsagePerc = 0.0f;
         }
         clusterUsagePerc =
             calc.divide(cluster, usedResourceClone, cluster) * 100;
diff --git a/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-resourcemanager/src/test/java/org/apache/hadoop/yarn/server/resourcemanager/scheduler/TestSchedulerApplicationAttempt.java b/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-resourcemanager/src/test/java/org/apache/hadoop/yarn/server/resourcemanager/scheduler/TestSchedulerApplicationAttempt.java
index c110b1c3d5d..0d6ff160e55 100644
--- a/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-resourcemanager/src/test/java/org/apache/hadoop/yarn/server/resourcemanager/scheduler/TestSchedulerApplicationAttempt.java
+++ b/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-resourcemanager/src/test/java/org/apache/hadoop/yarn/server/resourcemanager/scheduler/TestSchedulerApplicationAttempt.java
@@ -271,7 +271,7 @@ public class TestSchedulerApplicationAttempt {
     assertEquals(60.0f,
         app.getResourceUsageReport().getClusterUsagePercentage(), 0.01f);
 
-    queue = createQueue("test3", null, 0.0f);
+    queue = createQueue("test3", null, Float.MIN_VALUE);
     app = new SchedulerApplicationAttempt(appAttId, user, queue,
         queue.getAbstractUsersManager(), rmContext);
 
diff --git a/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-resourcemanager/src/test/java/org/apache/hadoop/yarn/server/resourcemanager/scheduler/capacity/TestLeafQueue.java b/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-resourcemanager/src/test/java/org/apache/hadoop/yarn/server/resourcemanager/scheduler/capacity/TestLeafQueue.java
index 04bb7912d1c..15a5eb2e92d 100644
--- a/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-resourcemanager/src/test/java/org/apache/hadoop/yarn/server/resourcemanager/scheduler/capacity/TestLeafQueue.java
+++ b/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-resourcemanager/src/test/java/org/apache/hadoop/yarn/server/resourcemanager/scheduler/capacity/TestLeafQueue.java
@@ -4037,6 +4037,16 @@ public class TestLeafQueue {
         0.01f);
     assertEquals(15.0f,
         app.getResourceUsageReport().getClusterUsagePercentage(), 0.01f);
+
+    // test that queueUsagePercentage returns neither NaN nor Infinite
+    AbstractCSQueue zeroQueue = createQueue("test2.2", null,
+        Float.MIN_VALUE, Float.MIN_VALUE,
+        Resources.multiply(res, Float.MIN_VALUE));
+    app = new FiCaSchedulerApp(appAttId, user, zeroQueue,
+        qChild.getAbstractUsersManager(), rmContext);
+    app.getAppAttemptResourceUsage().incUsed(requestedResource);
+    assertEquals(0.0f, app.getResourceUsageReport().getQueueUsagePercentage(),
+        0.01f);
   }
 
   @Test