From bc9184ee001c848518440c7e4dfa6e258a82089a Mon Sep 17 00:00:00 2001
From: niuyulin <nyl353@163.com>
Date: Wed, 22 Apr 2020 14:55:38 +0800
Subject: [PATCH] HBASE-23933 Separate a hbase-balancer module (#1436)

Signed-off-by: Duo Zhang <zhangduo@apache.org>
Signed-off-by: Viraj Jasani <vjasani@apache.org>
---
 hbase-assembly/pom.xml                        |   4 +
 .../src/main/assembly/hadoop-three-compat.xml |   1 +
 .../src/main/assembly/hadoop-two-compat.xml   |   1 +
 hbase-balancer/pom.xml                        | 168 ++++++++++++++++++
 .../favored/FavoredNodeAssignmentHelper.java  |   9 +-
 .../hbase/favored/FavoredNodesPlan.java       |   2 +-
 .../hbase/favored/FavoredNodesPromoter.java   |   0
 .../favored/StartcodeAgnosticServerName.java  |   0
 .../master/AssignmentVerificationReport.java  |   2 +-
 .../hadoop/hbase/master/RackManager.java      |   0
 .../hadoop/hbase/master/RegionPlan.java       |   0
 .../SnapshotOfRegionAssignmentFromMeta.java   |   0
 .../hbase/master/assignment/ServerState.java  |   0
 .../master/balancer/BalancerRegionLoad.java   |   0
 .../master/balancer/ClusterLoadState.java     |   0
 .../master/balancer/MetricsBalancer.java      |   6 +-
 .../balancer/MetricsStochasticBalancer.java   |   0
 .../master/balancer/RegionInfoComparator.java |   0
 .../hbase/master/balancer/ServerAndLoad.java  |   0
 .../hadoop/hbase/master/TestRegionPlan.java   |   0
 .../master/balancer/TestServerAndLoad.java    |   0
 hbase-server/pom.xml                          |   4 +
 pom.xml                                       |   6 +
 23 files changed, 193 insertions(+), 10 deletions(-)
 create mode 100644 hbase-balancer/pom.xml
 rename {hbase-server => hbase-balancer}/src/main/java/org/apache/hadoop/hbase/favored/FavoredNodeAssignmentHelper.java (98%)
 rename {hbase-server => hbase-balancer}/src/main/java/org/apache/hadoop/hbase/favored/FavoredNodesPlan.java (98%)
 rename {hbase-server => hbase-balancer}/src/main/java/org/apache/hadoop/hbase/favored/FavoredNodesPromoter.java (100%)
 rename {hbase-server => hbase-balancer}/src/main/java/org/apache/hadoop/hbase/favored/StartcodeAgnosticServerName.java (100%)
 rename {hbase-server => hbase-balancer}/src/main/java/org/apache/hadoop/hbase/master/AssignmentVerificationReport.java (99%)
 rename {hbase-server => hbase-balancer}/src/main/java/org/apache/hadoop/hbase/master/RackManager.java (100%)
 rename {hbase-server => hbase-balancer}/src/main/java/org/apache/hadoop/hbase/master/RegionPlan.java (100%)
 rename {hbase-server => hbase-balancer}/src/main/java/org/apache/hadoop/hbase/master/SnapshotOfRegionAssignmentFromMeta.java (100%)
 rename {hbase-server => hbase-balancer}/src/main/java/org/apache/hadoop/hbase/master/assignment/ServerState.java (100%)
 rename {hbase-server => hbase-balancer}/src/main/java/org/apache/hadoop/hbase/master/balancer/BalancerRegionLoad.java (100%)
 rename {hbase-server => hbase-balancer}/src/main/java/org/apache/hadoop/hbase/master/balancer/ClusterLoadState.java (100%)
 rename {hbase-server => hbase-balancer}/src/main/java/org/apache/hadoop/hbase/master/balancer/MetricsBalancer.java (95%)
 rename {hbase-server => hbase-balancer}/src/main/java/org/apache/hadoop/hbase/master/balancer/MetricsStochasticBalancer.java (100%)
 rename {hbase-server => hbase-balancer}/src/main/java/org/apache/hadoop/hbase/master/balancer/RegionInfoComparator.java (100%)
 rename {hbase-server => hbase-balancer}/src/main/java/org/apache/hadoop/hbase/master/balancer/ServerAndLoad.java (100%)
 rename {hbase-server => hbase-balancer}/src/test/java/org/apache/hadoop/hbase/master/TestRegionPlan.java (100%)
 rename {hbase-server => hbase-balancer}/src/test/java/org/apache/hadoop/hbase/master/balancer/TestServerAndLoad.java (100%)

diff --git a/hbase-assembly/pom.xml b/hbase-assembly/pom.xml
index 209ec702b03..198c9587701 100644
--- a/hbase-assembly/pom.xml
+++ b/hbase-assembly/pom.xml
@@ -289,6 +289,10 @@
       <groupId>org.apache.hbase</groupId>
       <artifactId>hbase-backup</artifactId>
     </dependency>
+    <dependency>
+      <groupId>org.apache.hbase</groupId>
+      <artifactId>hbase-balancer</artifactId>
+    </dependency>
     <dependency>
       <groupId>org.apache.hbase</groupId>
       <artifactId>hbase-replication</artifactId>
diff --git a/hbase-assembly/src/main/assembly/hadoop-three-compat.xml b/hbase-assembly/src/main/assembly/hadoop-three-compat.xml
index 310d06c4a3e..b9c2777f7dd 100644
--- a/hbase-assembly/src/main/assembly/hadoop-three-compat.xml
+++ b/hbase-assembly/src/main/assembly/hadoop-three-compat.xml
@@ -50,6 +50,7 @@
         <include>org.apache.hbase:hbase-procedure</include>
         <include>org.apache.hbase:hbase-protocol</include>
         <include>org.apache.hbase:hbase-protocol-shaded</include>
+        <include>org.apache.hbase:hbase-balancer</include>
         <include>org.apache.hbase:hbase-replication</include>
         <include>org.apache.hbase:hbase-rest</include>
         <include>org.apache.hbase:hbase-rsgroup</include>
diff --git a/hbase-assembly/src/main/assembly/hadoop-two-compat.xml b/hbase-assembly/src/main/assembly/hadoop-two-compat.xml
index a769b65a64e..26b59ffb703 100644
--- a/hbase-assembly/src/main/assembly/hadoop-two-compat.xml
+++ b/hbase-assembly/src/main/assembly/hadoop-two-compat.xml
@@ -50,6 +50,7 @@
         <include>org.apache.hbase:hbase-procedure</include>
         <include>org.apache.hbase:hbase-protocol</include>
         <include>org.apache.hbase:hbase-protocol-shaded</include>
+        <include>org.apache.hbase:hbase-balancer</include>
         <include>org.apache.hbase:hbase-replication</include>
         <include>org.apache.hbase:hbase-rest</include>
         <include>org.apache.hbase:hbase-server</include>
diff --git a/hbase-balancer/pom.xml b/hbase-balancer/pom.xml
new file mode 100644
index 00000000000..fba72eb4dd0
--- /dev/null
+++ b/hbase-balancer/pom.xml
@@ -0,0 +1,168 @@
+<?xml version="1.0"?>
+<project xmlns="https://maven.apache.org/POM/4.0.0" xmlns:xsi="https://www.w3.org/2001/XMLSchema-instance"
+         xsi:schemaLocation="https://maven.apache.org/POM/4.0.0 https://maven.apache.org/xsd/maven-4.0.0.xsd">
+  <!--
+  /**
+   * Licensed to the Apache Software Foundation (ASF) under one
+   * or more contributor license agreements.  See the NOTICE file
+   * distributed with this work for additional information
+   * regarding copyright ownership.  The ASF licenses this file
+   * to you under the Apache License, Version 2.0 (the
+   * "License"); you may not use this file except in compliance
+   * with the License.  You may obtain a copy of the License at
+   *
+   *     http://www.apache.org/licenses/LICENSE-2.0
+   *
+   * Unless required by applicable law or agreed to in writing, software
+   * distributed under the License is distributed on an "AS IS" BASIS,
+   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+   * See the License for the specific language governing permissions and
+   * limitations under the License.
+   */
+  -->
+  <modelVersion>4.0.0</modelVersion>
+  <parent>
+    <artifactId>hbase-build-configuration</artifactId>
+    <groupId>org.apache.hbase</groupId>
+    <version>3.0.0-SNAPSHOT</version>
+    <relativePath>../hbase-build-configuration</relativePath>
+  </parent>
+
+  <artifactId>hbase-balancer</artifactId>
+  <name>Apache HBase - Balancer</name>
+  <description>HBase Balancer Support</description>
+  <!--REMOVE-->
+
+  <build>
+    <plugins>
+      <!-- Make a jar and put the sources in the jar -->
+      <plugin>
+        <groupId>org.apache.maven.plugins</groupId>
+        <artifactId>maven-source-plugin</artifactId>
+      </plugin>
+      <plugin>
+        <!--Make it so assembly:single does nothing in here-->
+        <artifactId>maven-assembly-plugin</artifactId>
+        <configuration>
+          <skipAssembly>true</skipAssembly>
+        </configuration>
+      </plugin>
+      <plugin>
+        <groupId>net.revelc.code</groupId>
+        <artifactId>warbucks-maven-plugin</artifactId>
+      </plugin>
+      <plugin>
+        <groupId>org.apache.maven.plugins</groupId>
+        <artifactId>maven-checkstyle-plugin</artifactId>
+        <configuration>
+          <failOnViolation>true</failOnViolation>
+        </configuration>
+      </plugin>
+    </plugins>
+  </build>
+
+  <dependencies>
+    <dependency>
+      <groupId>org.apache.hbase</groupId>
+      <artifactId>hbase-common</artifactId>
+      <type>test-jar</type>
+      <scope>test</scope>
+    </dependency>
+    <dependency>
+      <groupId>org.apache.hbase</groupId>
+      <artifactId>hbase-annotations</artifactId>
+      <type>test-jar</type>
+      <scope>test</scope>
+    </dependency>
+    <dependency>
+      <groupId>org.apache.hbase</groupId>
+      <artifactId>hbase-common</artifactId>
+    </dependency>
+    <dependency>
+      <groupId>org.apache.hbase</groupId>
+      <artifactId>hbase-client</artifactId>
+    </dependency>
+    <dependency>
+      <groupId>org.slf4j</groupId>
+      <artifactId>slf4j-api</artifactId>
+    </dependency>
+    <dependency>
+      <groupId>com.github.stephenc.findbugs</groupId>
+      <artifactId>findbugs-annotations</artifactId>
+      <scope>compile</scope>
+      <optional>true</optional>
+    </dependency>
+    <dependency>
+      <groupId>junit</groupId>
+      <artifactId>junit</artifactId>
+      <scope>test</scope>
+    </dependency>
+  </dependencies>
+
+  <profiles>
+    <!-- Profiles for building against different hadoop versions -->
+
+    <!-- profile for building against Hadoop 2.x.  This is the default -->
+    <profile>
+      <id>hadoop-2.0</id>
+      <activation>
+        <property>
+          <!--Below formatting for dev-support/generate-hadoopX-poms.sh-->
+          <!--h2-->
+          <name>!hadoop.profile</name>
+        </property>
+      </activation>
+      <dependencies>
+        <dependency>
+          <groupId>org.apache.hadoop</groupId>
+          <artifactId>hadoop-common</artifactId>
+        </dependency>
+      </dependencies>
+    </profile>
+    <!--
+      profile for building against Hadoop 3.0.x. Activate using:
+       mvn -Dhadoop.profile=3.0
+    -->
+    <profile>
+      <id>hadoop-3.0</id>
+      <activation>
+        <property>
+          <name>hadoop.profile</name>
+          <value>3.0</value>
+        </property>
+      </activation>
+      <dependencies>
+        <dependency>
+          <groupId>org.apache.hadoop</groupId>
+          <artifactId>hadoop-common</artifactId>
+        </dependency>
+      </dependencies>
+    </profile>
+    <profile>
+      <id>eclipse-specific</id>
+      <activation>
+        <property>
+          <name>m2e.version</name>
+        </property>
+      </activation>
+      <build>
+        <pluginManagement>
+          <plugins>
+            <!--This plugin's configuration is used to store Eclipse m2e settings
+                 only. It has no influence on the Maven build itself.-->
+            <plugin>
+              <groupId>org.eclipse.m2e</groupId>
+              <artifactId>lifecycle-mapping</artifactId>
+              <configuration>
+                <lifecycleMappingMetadata>
+                  <pluginExecutions>
+                  </pluginExecutions>
+                </lifecycleMappingMetadata>
+              </configuration>
+            </plugin>
+          </plugins>
+        </pluginManagement>
+      </build>
+    </profile>
+  </profiles>
+</project>
diff --git a/hbase-server/src/main/java/org/apache/hadoop/hbase/favored/FavoredNodeAssignmentHelper.java b/hbase-balancer/src/main/java/org/apache/hadoop/hbase/favored/FavoredNodeAssignmentHelper.java
similarity index 98%
rename from hbase-server/src/main/java/org/apache/hadoop/hbase/favored/FavoredNodeAssignmentHelper.java
rename to hbase-balancer/src/main/java/org/apache/hadoop/hbase/favored/FavoredNodeAssignmentHelper.java
index a754c6b8e43..4b73522df6c 100644
--- a/hbase-server/src/main/java/org/apache/hadoop/hbase/favored/FavoredNodeAssignmentHelper.java
+++ b/hbase-balancer/src/main/java/org/apache/hadoop/hbase/favored/FavoredNodeAssignmentHelper.java
@@ -60,11 +60,10 @@ import org.apache.hadoop.hbase.shaded.protobuf.generated.HBaseProtos;
 import org.apache.hadoop.hbase.shaded.protobuf.generated.HBaseProtos.FavoredNodes;
 
 /**
- * Helper class for {@link FavoredNodeLoadBalancer} that has all the intelligence for racks,
- * meta scans, etc. Instantiated by the {@link FavoredNodeLoadBalancer} when needed (from
- * within calls like {@link FavoredNodeLoadBalancer#randomAssignment(RegionInfo, List)}).
- * All updates to favored nodes should only be done from {@link FavoredNodesManager} and not
- * through this helper class (except for tests).
+ * Helper class for FavoredNodeLoadBalancer that has all the intelligence for racks, meta scans,
+ * etc. Instantiated by the FavoredNodeLoadBalancer when needed (from within calls like
+ * FavoredNodeLoadBalancer#randomAssignment(RegionInfo, List). All updates to favored nodes should
+ * only be done from FavoredNodesManager and not through this helper class (except for tests).
  */
 @InterfaceAudience.Private
 public class FavoredNodeAssignmentHelper {
diff --git a/hbase-server/src/main/java/org/apache/hadoop/hbase/favored/FavoredNodesPlan.java b/hbase-balancer/src/main/java/org/apache/hadoop/hbase/favored/FavoredNodesPlan.java
similarity index 98%
rename from hbase-server/src/main/java/org/apache/hadoop/hbase/favored/FavoredNodesPlan.java
rename to hbase-balancer/src/main/java/org/apache/hadoop/hbase/favored/FavoredNodesPlan.java
index a7667c328a1..79207c01c12 100644
--- a/hbase-server/src/main/java/org/apache/hadoop/hbase/favored/FavoredNodesPlan.java
+++ b/hbase-balancer/src/main/java/org/apache/hadoop/hbase/favored/FavoredNodesPlan.java
@@ -29,7 +29,7 @@ import org.apache.yetus.audience.InterfaceAudience;
 
 /**
  * This class contains the mapping information between each region name and
- * its favored region server list. Used by {@link FavoredNodeLoadBalancer} set
+ * its favored region server list. Used by FavoredNodeLoadBalancer set
  * of classes and from unit tests (hence the class is public)
  *
  * All the access to this class is thread-safe.
diff --git a/hbase-server/src/main/java/org/apache/hadoop/hbase/favored/FavoredNodesPromoter.java b/hbase-balancer/src/main/java/org/apache/hadoop/hbase/favored/FavoredNodesPromoter.java
similarity index 100%
rename from hbase-server/src/main/java/org/apache/hadoop/hbase/favored/FavoredNodesPromoter.java
rename to hbase-balancer/src/main/java/org/apache/hadoop/hbase/favored/FavoredNodesPromoter.java
diff --git a/hbase-server/src/main/java/org/apache/hadoop/hbase/favored/StartcodeAgnosticServerName.java b/hbase-balancer/src/main/java/org/apache/hadoop/hbase/favored/StartcodeAgnosticServerName.java
similarity index 100%
rename from hbase-server/src/main/java/org/apache/hadoop/hbase/favored/StartcodeAgnosticServerName.java
rename to hbase-balancer/src/main/java/org/apache/hadoop/hbase/favored/StartcodeAgnosticServerName.java
diff --git a/hbase-server/src/main/java/org/apache/hadoop/hbase/master/AssignmentVerificationReport.java b/hbase-balancer/src/main/java/org/apache/hadoop/hbase/master/AssignmentVerificationReport.java
similarity index 99%
rename from hbase-server/src/main/java/org/apache/hadoop/hbase/master/AssignmentVerificationReport.java
rename to hbase-balancer/src/main/java/org/apache/hadoop/hbase/master/AssignmentVerificationReport.java
index 5c084bf4ebc..346555b1518 100644
--- a/hbase-server/src/main/java/org/apache/hadoop/hbase/master/AssignmentVerificationReport.java
+++ b/hbase-balancer/src/main/java/org/apache/hadoop/hbase/master/AssignmentVerificationReport.java
@@ -35,7 +35,7 @@ import org.apache.yetus.audience.InterfaceAudience;
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
 /**
- * Helper class that is used by {@link RegionPlacementMaintainer} to print
+ * Helper class that is used by RegionPlacementMaintainer to print
  * information for favored nodes
  *
  */
diff --git a/hbase-server/src/main/java/org/apache/hadoop/hbase/master/RackManager.java b/hbase-balancer/src/main/java/org/apache/hadoop/hbase/master/RackManager.java
similarity index 100%
rename from hbase-server/src/main/java/org/apache/hadoop/hbase/master/RackManager.java
rename to hbase-balancer/src/main/java/org/apache/hadoop/hbase/master/RackManager.java
diff --git a/hbase-server/src/main/java/org/apache/hadoop/hbase/master/RegionPlan.java b/hbase-balancer/src/main/java/org/apache/hadoop/hbase/master/RegionPlan.java
similarity index 100%
rename from hbase-server/src/main/java/org/apache/hadoop/hbase/master/RegionPlan.java
rename to hbase-balancer/src/main/java/org/apache/hadoop/hbase/master/RegionPlan.java
diff --git a/hbase-server/src/main/java/org/apache/hadoop/hbase/master/SnapshotOfRegionAssignmentFromMeta.java b/hbase-balancer/src/main/java/org/apache/hadoop/hbase/master/SnapshotOfRegionAssignmentFromMeta.java
similarity index 100%
rename from hbase-server/src/main/java/org/apache/hadoop/hbase/master/SnapshotOfRegionAssignmentFromMeta.java
rename to hbase-balancer/src/main/java/org/apache/hadoop/hbase/master/SnapshotOfRegionAssignmentFromMeta.java
diff --git a/hbase-server/src/main/java/org/apache/hadoop/hbase/master/assignment/ServerState.java b/hbase-balancer/src/main/java/org/apache/hadoop/hbase/master/assignment/ServerState.java
similarity index 100%
rename from hbase-server/src/main/java/org/apache/hadoop/hbase/master/assignment/ServerState.java
rename to hbase-balancer/src/main/java/org/apache/hadoop/hbase/master/assignment/ServerState.java
diff --git a/hbase-server/src/main/java/org/apache/hadoop/hbase/master/balancer/BalancerRegionLoad.java b/hbase-balancer/src/main/java/org/apache/hadoop/hbase/master/balancer/BalancerRegionLoad.java
similarity index 100%
rename from hbase-server/src/main/java/org/apache/hadoop/hbase/master/balancer/BalancerRegionLoad.java
rename to hbase-balancer/src/main/java/org/apache/hadoop/hbase/master/balancer/BalancerRegionLoad.java
diff --git a/hbase-server/src/main/java/org/apache/hadoop/hbase/master/balancer/ClusterLoadState.java b/hbase-balancer/src/main/java/org/apache/hadoop/hbase/master/balancer/ClusterLoadState.java
similarity index 100%
rename from hbase-server/src/main/java/org/apache/hadoop/hbase/master/balancer/ClusterLoadState.java
rename to hbase-balancer/src/main/java/org/apache/hadoop/hbase/master/balancer/ClusterLoadState.java
diff --git a/hbase-server/src/main/java/org/apache/hadoop/hbase/master/balancer/MetricsBalancer.java b/hbase-balancer/src/main/java/org/apache/hadoop/hbase/master/balancer/MetricsBalancer.java
similarity index 95%
rename from hbase-server/src/main/java/org/apache/hadoop/hbase/master/balancer/MetricsBalancer.java
rename to hbase-balancer/src/main/java/org/apache/hadoop/hbase/master/balancer/MetricsBalancer.java
index 1925568454b..015e1d486c1 100644
--- a/hbase-server/src/main/java/org/apache/hadoop/hbase/master/balancer/MetricsBalancer.java
+++ b/hbase-balancer/src/main/java/org/apache/hadoop/hbase/master/balancer/MetricsBalancer.java
@@ -32,10 +32,10 @@ public class MetricsBalancer {
   public MetricsBalancer() {
     initSource();
   }
-  
+
   /**
-   * A function to instantiate the metrics source. This function can be overridden in its 
-   * subclasses to provide extended sources
+   * A function to instantiate the metrics source. This function can be overridden in its subclasses
+   * to provide extended sources
    */
   protected void initSource() {
     source = CompatibilitySingletonFactory.getInstance(MetricsBalancerSource.class);
diff --git a/hbase-server/src/main/java/org/apache/hadoop/hbase/master/balancer/MetricsStochasticBalancer.java b/hbase-balancer/src/main/java/org/apache/hadoop/hbase/master/balancer/MetricsStochasticBalancer.java
similarity index 100%
rename from hbase-server/src/main/java/org/apache/hadoop/hbase/master/balancer/MetricsStochasticBalancer.java
rename to hbase-balancer/src/main/java/org/apache/hadoop/hbase/master/balancer/MetricsStochasticBalancer.java
diff --git a/hbase-server/src/main/java/org/apache/hadoop/hbase/master/balancer/RegionInfoComparator.java b/hbase-balancer/src/main/java/org/apache/hadoop/hbase/master/balancer/RegionInfoComparator.java
similarity index 100%
rename from hbase-server/src/main/java/org/apache/hadoop/hbase/master/balancer/RegionInfoComparator.java
rename to hbase-balancer/src/main/java/org/apache/hadoop/hbase/master/balancer/RegionInfoComparator.java
diff --git a/hbase-server/src/main/java/org/apache/hadoop/hbase/master/balancer/ServerAndLoad.java b/hbase-balancer/src/main/java/org/apache/hadoop/hbase/master/balancer/ServerAndLoad.java
similarity index 100%
rename from hbase-server/src/main/java/org/apache/hadoop/hbase/master/balancer/ServerAndLoad.java
rename to hbase-balancer/src/main/java/org/apache/hadoop/hbase/master/balancer/ServerAndLoad.java
diff --git a/hbase-server/src/test/java/org/apache/hadoop/hbase/master/TestRegionPlan.java b/hbase-balancer/src/test/java/org/apache/hadoop/hbase/master/TestRegionPlan.java
similarity index 100%
rename from hbase-server/src/test/java/org/apache/hadoop/hbase/master/TestRegionPlan.java
rename to hbase-balancer/src/test/java/org/apache/hadoop/hbase/master/TestRegionPlan.java
diff --git a/hbase-server/src/test/java/org/apache/hadoop/hbase/master/balancer/TestServerAndLoad.java b/hbase-balancer/src/test/java/org/apache/hadoop/hbase/master/balancer/TestServerAndLoad.java
similarity index 100%
rename from hbase-server/src/test/java/org/apache/hadoop/hbase/master/balancer/TestServerAndLoad.java
rename to hbase-balancer/src/test/java/org/apache/hadoop/hbase/master/balancer/TestServerAndLoad.java
diff --git a/hbase-server/pom.xml b/hbase-server/pom.xml
index 48992b67bce..d947033b693 100644
--- a/hbase-server/pom.xml
+++ b/hbase-server/pom.xml
@@ -286,6 +286,10 @@
       <groupId>org.apache.hbase</groupId>
       <artifactId>hbase-replication</artifactId>
     </dependency>
+    <dependency>
+      <groupId>org.apache.hbase</groupId>
+      <artifactId>hbase-balancer</artifactId>
+    </dependency>
     <dependency>
       <groupId>org.apache.hbase</groupId>
       <artifactId>hbase-common</artifactId>
diff --git a/pom.xml b/pom.xml
index e8c78c6e829..da4d92605e7 100755
--- a/pom.xml
+++ b/pom.xml
@@ -63,6 +63,7 @@
   <modules>
     <module>hbase-build-configuration</module>
     <module>hbase-replication</module>
+    <module>hbase-balancer</module>
     <module>hbase-mapreduce</module>
     <module>hbase-resource-bundle</module>
     <module>hbase-http</module>
@@ -1725,6 +1726,11 @@
         <groupId>org.apache.hbase</groupId>
         <version>${project.version}</version>
       </dependency>
+      <dependency>
+        <artifactId>hbase-balancer</artifactId>
+        <groupId>org.apache.hbase</groupId>
+        <version>${project.version}</version>
+      </dependency>
       <dependency>
         <artifactId>hbase-http</artifactId>
         <groupId>org.apache.hbase</groupId>