From ec2fd013334b83cccec53b03ef3e26c1668d1a89 Mon Sep 17 00:00:00 2001
From: minni31 <minnimittal31@gmail.com>
Date: Tue, 1 Feb 2022 23:07:40 +0530
Subject: [PATCH] =?UTF-8?q?YARN-10459.=20containerLaunchedOnNode=20method?=
 =?UTF-8?q?=20not=20need=20to=20hold=20scheduler=E2=80=A6=20(#3195)?=
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---
 .../scheduler/SchedulerApplicationAttempt.java                | 4 ++--
 1 file changed, 2 insertions(+), 2 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 c50ee56738..2c84d39924 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
@@ -656,7 +656,7 @@ public int getNumReservedContainers(
   @SuppressWarnings("unchecked")
   public void containerLaunchedOnNode(ContainerId containerId,
       NodeId nodeId) {
-    writeLock.lock();
+    readLock.lock();
     try {
       // Inform the container
       RMContainer rmContainer = getRMContainer(containerId);
@@ -670,7 +670,7 @@ public void containerLaunchedOnNode(ContainerId containerId,
       rmContainer.handle(
           new RMContainerEvent(containerId, RMContainerEventType.LAUNCHED));
     } finally {
-      writeLock.unlock();
+      readLock.unlock();
     }
   }