From 413a4c3c05d317090c706385c51e4cabcfd92b0e 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

---
 .../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 0b0ba7945d6..0e031f4ba51 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
@@ -830,6 +830,11 @@ public class Component implements EventHandler<ComponentEvent> {
                 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