From d2d8058ab35ec16e1f27a117aee8baa18e52a136 Mon Sep 17 00:00:00 2001
From: Yu Li <liyu@apache.org>
Date: Sat, 19 Mar 2016 21:24:07 +0800
Subject: [PATCH] HBASE-15451 Remove unnecessary wait in MVCC

---
 .../hbase/regionserver/MultiVersionConcurrencyControl.java   | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/MultiVersionConcurrencyControl.java b/hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/MultiVersionConcurrencyControl.java
index bf295e7d543..7424e4ebe5c 100644
--- a/hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/MultiVersionConcurrencyControl.java
+++ b/hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/MultiVersionConcurrencyControl.java
@@ -145,8 +145,9 @@ public class MultiVersionConcurrencyControl {
    * of the passed in WriteEntry.  Thus, the write is visible to MVCC readers.
    */
   public void completeAndWait(WriteEntry e) {
-    complete(e);
-    waitForRead(e);
+    if (!complete(e)) {
+      waitForRead(e);
+    }
   }
 
   /**