From dcf4559ebdb5bb11d03b264a9875bff316b89eef Mon Sep 17 00:00:00 2001
From: Brahma Reddy Battula <brahma@apache.org>
Date: Thu, 25 May 2017 01:27:13 +0800
Subject: [PATCH] HADOOP-14166. Reset the DecayRpcScheduler AvgResponseTime
 metric to zero when queue is not used. Contributed by Surendra Singh Lilhore.

---
 .../src/main/java/org/apache/hadoop/ipc/DecayRpcScheduler.java  | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/ipc/DecayRpcScheduler.java b/hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/ipc/DecayRpcScheduler.java
index 3c09625830..5ae4e8bcc5 100644
--- a/hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/ipc/DecayRpcScheduler.java
+++ b/hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/ipc/DecayRpcScheduler.java
@@ -618,6 +618,8 @@ void updateAverageResponseTime(boolean enableDecay) {
         } else {
           responseTimeAvgInLastWindow.set(i, averageResponseTime);
         }
+      } else {
+        responseTimeAvgInLastWindow.set(i, 0);
       }
       responseTimeCountInLastWindow.set(i, responseTimeCount);
       if (LOG.isDebugEnabled()) {