From e9230096ee3698e601d746259dbb0ab75190401e Mon Sep 17 00:00:00 2001
From: Michael Stack <stack@apache.org>
Date: Sat, 2 Feb 2008 00:53:48 +0000
Subject: [PATCH] HADOOP-2599 Some minor improvements to changes in HADOOP-2443

git-svn-id: https://svn.apache.org/repos/asf/hadoop/core/trunk/src/contrib/hbase@617725 13f79535-47bb-0310-9956-ffa450edef68
---
 CHANGES.txt                                              | 2 ++
 src/java/org/apache/hadoop/hbase/HConnectionManager.java | 4 ++--
 src/java/org/apache/hadoop/hbase/HConstants.java         | 6 ++++++
 3 files changed, 10 insertions(+), 2 deletions(-)

diff --git a/CHANGES.txt b/CHANGES.txt
index 1e60afff71f..15e5d823117 100644
--- a/CHANGES.txt
+++ b/CHANGES.txt
@@ -16,6 +16,8 @@ Trunk (unreleased changes)
    HADOOP-2731 Under load, regions become extremely large and eventually cause
                region servers to become unresponsive
    HADOOP-2693 NPE in getClosestRowBefore (Bryan Duxbury & Stack)
+   HADOOP-2599 Some minor improvements to changes in HADOOP-2443
+               (Bryan Duxbury & Stack)
 
   IMPROVEMENTS
    HADOOP-2555 Refactor the HTable#get and HTable#getRow methods to avoid
diff --git a/src/java/org/apache/hadoop/hbase/HConnectionManager.java b/src/java/org/apache/hadoop/hbase/HConnectionManager.java
index 842070f15ba..66bce74fff5 100644
--- a/src/java/org/apache/hadoop/hbase/HConnectionManager.java
+++ b/src/java/org/apache/hadoop/hbase/HConnectionManager.java
@@ -257,7 +257,7 @@ public class HConnectionManager implements HConstants {
           // open a scanner over the meta region
           scannerId = server.openScanner(
             metaLocation.getRegionInfo().getRegionName(),
-            COLUMN_FAMILY_ARRAY, EMPTY_START_ROW, LATEST_TIMESTAMP,
+            COLUMN_FAMILY_ARRAY, startRow, LATEST_TIMESTAMP,
             null);
           
           // iterate through the scanner, accumulating unique table names
@@ -296,7 +296,7 @@ public class HConnectionManager implements HConstants {
             server.close(scannerId);
           }
         }
-      } while (startRow.compareTo(EMPTY_START_ROW) != 0);
+      } while (startRow.compareTo(LAST_ROW) != 0);
       
       return uniqueTables.toArray(new HTableDescriptor[uniqueTables.size()]);
     }
diff --git a/src/java/org/apache/hadoop/hbase/HConstants.java b/src/java/org/apache/hadoop/hbase/HConstants.java
index d543d6fd44a..5731cdedae4 100644
--- a/src/java/org/apache/hadoop/hbase/HConstants.java
+++ b/src/java/org/apache/hadoop/hbase/HConstants.java
@@ -167,6 +167,12 @@ public interface HConstants {
    */
   static final Text EMPTY_START_ROW = EMPTY_TEXT;
 
+  /** 
+    * Used by scanners and others when they're trying to detect the end of a 
+    * table 
+    */
+  static final Text LAST_ROW = EMPTY_TEXT;
+  
   /** When we encode strings, we always specify UTF8 encoding */
   static final String UTF8_ENCODING = "UTF-8";