HDFS-7893. Update the POM to create a separate hdfs-client jar. Contributed by Haohui Mai.

hadoop-hdfs-project/hadoop-hdfs-client/dev-support/findbugsExcludeFile.xml

@@ -0,0 +1,2 @@
+<FindBugsFilter>
+</FindBugsFilter>

hadoop-hdfs-project/hadoop-hdfs-client/pom.xml

@@ -0,0 +1,49 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!--
+  Licensed 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. See accompanying LICENSE file.
+-->
+<project xmlns="http://maven.apache.org/POM/4.0.0"
+xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+xsi:schemaLocation="http://maven.apache.org/POM/4.0.0
+http://maven.apache.org/xsd/maven-4.0.0.xsd">
+  <modelVersion>4.0.0</modelVersion>
+  <parent>
+    <groupId>org.apache.hadoop</groupId>
+    <artifactId>hadoop-project-dist</artifactId>
+    <version>3.0.0-SNAPSHOT</version>
+    <relativePath>../../hadoop-project-dist</relativePath>
+  </parent>
+  <groupId>org.apache.hadoop</groupId>
+  <artifactId>hadoop-hdfs-client</artifactId>
+  <version>2.8.0-SNAPSHOT</version>
+  <description>Apache Hadoop HDFS Client</description>
+  <name>Apache Hadoop HDFS Client</name>
+  <packaging>jar</packaging>
+  <build>
+    <plugins>
+      <plugin>
+        <groupId>org.apache.maven.plugins</groupId>
+        <artifactId>maven-surefire-plugin</artifactId>
+      </plugin>
+      <plugin>
+        <groupId>org.apache.rat</groupId>
+        <artifactId>apache-rat-plugin</artifactId>
+        <configuration>
+          <excludes>
+            <exclude>dev-support/findbugsExcludeFile.xml</exclude>
+          </excludes>
+        </configuration>
+      </plugin>
+    </plugins>
+  </build>
+</project>

hadoop-hdfs-project/hadoop-hdfs-nfs/pom.xml

@@ -56,6 +56,11 @@ http://maven.apache.org/xsd/maven-4.0.0.xsd">
       <artifactId>hadoop-hdfs</artifactId>
       <scope>compile</scope>
     </dependency>
+    <dependency>
+      <groupId>org.apache.hadoop</groupId>
+      <artifactId>hadoop-hdfs-client</artifactId>
+      <scope>compile</scope>
+    </dependency>
     <dependency>
       <groupId>org.apache.hadoop</groupId>
       <artifactId>hadoop-hdfs</artifactId>

hadoop-hdfs-project/hadoop-hdfs/pom.xml

@@ -59,6 +59,11 @@ http://maven.apache.org/xsd/maven-4.0.0.xsd">
       <scope>test</scope>
       <type>test-jar</type>
     </dependency>
+    <dependency>
+      <groupId>org.apache.hadoop</groupId>
+      <artifactId>hadoop-hdfs-client</artifactId>
+      <scope>compile</scope>
+    </dependency>
     <dependency>
       <groupId>org.apache.zookeeper</groupId>
       <artifactId>zookeeper</artifactId>

hadoop-hdfs-project/hadoop-hdfs/src/contrib/bkjournal/pom.xml

@@ -52,6 +52,11 @@ http://maven.apache.org/xsd/maven-4.0.0.xsd">
       <artifactId>hadoop-hdfs</artifactId>
       <scope>provided</scope>
     </dependency>
+    <dependency>
+      <groupId>org.apache.hadoop</groupId>
+      <artifactId>hadoop-hdfs-client</artifactId>
+      <scope>provided</scope>
+    </dependency>
     <dependency> 
       <groupId>org.apache.hadoop</groupId>
       <artifactId>hadoop-hdfs</artifactId>

hadoop-hdfs-project/pom.xml

@@ -32,6 +32,7 @@ http://maven.apache.org/xsd/maven-4.0.0.xsd">
 
   <modules>
     <module>hadoop-hdfs</module>
+    <module>hadoop-hdfs-client</module>
     <module>hadoop-hdfs-httpfs</module>
     <module>hadoop-hdfs/src/contrib/bkjournal</module>
     <module>hadoop-hdfs-nfs</module>

hadoop-project/pom.xml

@@ -158,6 +158,11 @@
         <artifactId>hadoop-hdfs</artifactId>
         <version>${project.version}</version>
       </dependency>
+      <dependency>
+        <groupId>org.apache.hadoop</groupId>
+        <artifactId>hadoop-hdfs-client</artifactId>
+        <version>${project.version}</version>
+      </dependency>
       <dependency>
         <groupId>org.apache.hadoop</groupId>
         <artifactId>hadoop-hdfs</artifactId>