From 84e45319382b6dd7a8182332298005303dfbfc8d Mon Sep 17 00:00:00 2001
From: Michael Stack <stack@apache.org>
Date: Wed, 19 Jun 2013 04:58:26 +0000
Subject: [PATCH] HBASE-801 Avoid unnecessary lazy seek

git-svn-id: https://svn.apache.org/repos/asf/hbase/trunk@1494458 13f79535-47bb-0310-9956-ffa450edef68
---
 .../org/apache/hadoop/hbase/regionserver/KeyValueHeap.java     | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/KeyValueHeap.java b/hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/KeyValueHeap.java
index 9d2aceb9266..3a290be8720 100644
--- a/hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/KeyValueHeap.java
+++ b/hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/KeyValueHeap.java
@@ -294,7 +294,8 @@ public class KeyValueHeap extends NonLazyKeyValueScanner
       }
 
       boolean seekResult;
-      if (isLazy) {
+      if (isLazy && heap.size() > 0) {
+        // If there is only one scanner left, we don't do lazy seek.
         seekResult = scanner.requestSeek(seekKey, forward, useBloom);
       } else {
         seekResult = NonLazyKeyValueScanner.doRealSeek(