From 5358313f97d25e6e950873630c811b1cbde73f12 Mon Sep 17 00:00:00 2001
From: Brahma Reddy Battula <brahma@apache.org>
Date: Tue, 30 Mar 2021 13:52:07 +0530
Subject: [PATCH] YARN-10466.Fix NullPointerException in yarn-services
 Component.java. Contributed by  D M Murali Krishna Reddy

(cherry picked from commit 413a4c3c05d317090c706385c51e4cabcfd92b0e)
---
 .../org/apache/hadoop/yarn/service/component/Component.java  | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-applications/hadoop-yarn-services/hadoop-yarn-services-core/src/main/java/org/apache/hadoop/yarn/service/component/Component.java b/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-applications/hadoop-yarn-services/hadoop-yarn-services-core/src/main/java/org/apache/hadoop/yarn/service/component/Component.java
index 1f3ca22f08..04729772ff 100644
--- a/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-applications/hadoop-yarn-services/hadoop-yarn-services-core/src/main/java/org/apache/hadoop/yarn/service/component/Component.java
+++ b/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-applications/hadoop-yarn-services/hadoop-yarn-services-core/src/main/java/org/apache/hadoop/yarn/service/component/Component.java
@@ -833,6 +833,11 @@ public void requestContainers(long count) {
                 targetExpressions.toArray(new TargetExpression[0])).build();
             break;
           }
+          if (constraint == null) {
+            LOG.info("[COMPONENT {}] Placement constraint: null ",
+                componentSpec.getName());
+            continue;
+          }
           // The default AND-ed final composite constraint
           if (finalConstraint != null) {
             finalConstraint = PlacementConstraints