From 40e9c22ea2800746ad324ec807b6eba136f51a92 Mon Sep 17 00:00:00 2001
From: Andrew Purtell <apurtell@apache.org>
Date: Mon, 12 Jan 2015 19:09:02 -0800
Subject: [PATCH] HBASE-12801 Failed to truncate a table while maintaing binary
 region boundaries (Liu Shaohui)

---
 .../java/org/apache/hadoop/hbase/util/Bytes.java     | 12 ++++++++++++
 hbase-shell/src/main/ruby/hbase/admin.rb             |  4 ++--
 2 files changed, 14 insertions(+), 2 deletions(-)

diff --git a/hbase-common/src/main/java/org/apache/hadoop/hbase/util/Bytes.java b/hbase-common/src/main/java/org/apache/hadoop/hbase/util/Bytes.java
index 9e79be35322..dd666e6ae26 100644
--- a/hbase-common/src/main/java/org/apache/hadoop/hbase/util/Bytes.java
+++ b/hbase-common/src/main/java/org/apache/hadoop/hbase/util/Bytes.java
@@ -1785,6 +1785,18 @@ public class Bytes {
     return result;
   }
 
+  /**
+   * @param t operands
+   * @return Array of binary byte arrays made from passed array of binary strings
+   */
+  public static byte[][] toBinaryByteArrays(final String[] t) {
+    byte[][] result = new byte[t.length][];
+    for (int i = 0; i < t.length; i++) {
+      result[i] = Bytes.toBytesBinary(t[i]);
+    }
+    return result;
+  }
+
   /**
    * @param column operand
    * @return A byte array of a byte array where first and only entry is
diff --git a/hbase-shell/src/main/ruby/hbase/admin.rb b/hbase-shell/src/main/ruby/hbase/admin.rb
index f7bcd83ba5e..0ce1a561b9a 100644
--- a/hbase-shell/src/main/ruby/hbase/admin.rb
+++ b/hbase-shell/src/main/ruby/hbase/admin.rb
@@ -398,8 +398,8 @@ module Hbase
     # Truncates table while maintaing region boundaries (deletes all records by recreating the table)
     def truncate_preserve(table_name, conf = @conf)
       h_table = @conn.getTable(table_name)
-      splits = h_table.getRegionLocations().keys().map{|i| Bytes.toString(i.getStartKey)}.delete_if{|k| k == ""}.to_java :String
-      splits = org.apache.hadoop.hbase.util.Bytes.toByteArrays(splits)
+      splits = h_table.getRegionLocations().keys().map{|i| Bytes.toStringBinary(i.getStartKey)}.delete_if{|k| k == ""}.to_java :String
+      splits = org.apache.hadoop.hbase.util.Bytes.toBinaryByteArrays(splits)
       table_description = h_table.getTableDescriptor()
       yield 'Disabling table...' if block_given?
       disable(table_name)