Hbase单机安装和javaAPI客户端链接测试

超、凢脫俗 2022-03-31 17:31 266阅读 0赞

## Hbase单机安装 ##

本测试机的信息如下

centos 7
    192.168.1.101  master

关掉所有的zookeeper，使用外部的ZK，导致冲突。单机版会使用自带的zookeeper启动，避免端口被占用，这个地方很容易进坑

查看zk端口是否被占用，被占用的一律关掉，只有在分布式情况下使用外部zk需要配置才可以使用

netstat -antp | fgrep 2181

hotname最好提前设置好，否则远程客户端(API链接)会找不到服务，其内部路径命名全部为hotname方式，这是个大坑

hostname master
    vi /etc/hosts
    192.168.1.101 master
    
    vi /etc/sysconfig/network
    NETWORKING=yes
    HOSTNAME=master

客户端如果要连接，也需要在host中设置，windows在C:\\Windows\\System32\\drivers\\etc\\hosts设置

192.168.1.101  master

wget http://mirror.bit.edu.cn/apache/hbase/1.4.9/hbase-1.4.9-bin.tar.gz
    tar -zxvf hbase-1.4.9-bin.tar.gz
    
    
    
    cd  hbase-1.4.9/conf
    vi hbase-env.sh
    export JAVA_HOME=/mnt/java-1.8.0
    
    
    
    vi hbase-1.4.9/conf/hbase-site.xml
    <configuration>
    <property>
            <name>hbase.rootdir</name>
            <value>file:/mnt/hadoop/HBase/HFiles</value>
    </property>
    <property>
            <name>hbase.zookeeper.property.dataDir</name>
            <value>/mnt/hadoop/HBase/zookeeper</value>
        </property>
    </property>
    
    <property>
            <name>hbase.zookeeper.quorum</name>
            <value>master</value>
    </property>
    <property>
      <name>hbase.zookeeper.property.clientPort</name>
      <value>2181</value>
    </property>
    
    </configuration>

进入/usr/local/HBase/bin目录，输入以下命令启动HBase:

./start-hbase.sh
    starting master, logging to /usr/local/HBase/bin/../logs/hbase-root-master-ubuntu.out
    
    停止HBase
    ./stop-hbase.sh
    
    #进入hbase shell 
    ./hbase shell

启动成功后，可以在浏览器上输入http://localhost:16010/查看HBase Web UI。注：192.168.0.156为博主Linux机器地址

### JAVA API 链接 ###

maven依赖jar

<dependency>
    			<groupId>org.apache.hbase</groupId>
    			<artifactId>hbase-client</artifactId>
    			<version>1.4.9</version>
    		</dependency>
    		<dependency>
    			<groupId>org.apache.hbase</groupId>
    			<artifactId>hbase-server</artifactId>
    			<version>1.4.9</version>
    		</dependency>
    		<dependency>
    		<groupId>org.apache.hbase</groupId>
    		<artifactId>hbase-common</artifactId>
    		<version>1.4.9</version>
    		</dependency>

java API

package com.bamboo.demo;
    
    import org.apache.hadoop.conf.Configuration;
    import org.apache.hadoop.hbase.HBaseConfiguration;
    import org.apache.hadoop.hbase.HColumnDescriptor;
    import org.apache.hadoop.hbase.HTableDescriptor;
    import org.apache.hadoop.hbase.TableName;
    import org.apache.hadoop.hbase.client.*;
    import org.apache.hadoop.hbase.util.Bytes;
    import org.junit.After;
    import org.junit.Before;
    
    import java.util.ArrayList;
    
    public class HbaseTest {
    
        /**
         * 配置ss
         */
        static Configuration config = null;
        private static Connection connection = null;
        private static Table table = null;
    
        @Before
        public static void init() throws Exception {
            System.setProperty("hadoop.home.dir", "d:/");
            config = HBaseConfiguration.create();// 配置
            config.set("hbase.zookeeper.quorum", "192.168.1.101");// zookeeper地址
            config.set("hbase.zookeeper.property.clientPort", "2181");// zookeeper端口
            connection = ConnectionFactory.createConnection(config);
            table = connection.getTable(TableName.valueOf("dept_test"));
        }
    
        public static void main(String[] args) throws Exception {
            init();
            try {
                showTable();
    //            createTable();
             } finally {
            close();
            }
    
        }
    
        /**
         * 创建数据库表dept，并增加列族info和subdept
         *
         * @throws Exception
         */
        public static void createTable() throws Exception {
            // 创建表管理类
            Admin admin = connection.getAdmin(); // hbase表管理
            // 创建表描述类
    //        TableName tableName = TableName.valueOf("dept_test"); // 表名称
            HTableDescriptor desc = new HTableDescriptor(table.getName());
            // 创建列族的描述类
            HColumnDescriptor family = new HColumnDescriptor("info"); // 列族
            // 将列族添加到表中
            desc.addFamily(family);
            HColumnDescriptor family2 = new HColumnDescriptor("subdept"); // 列族
            // 将列族添加到表中
            desc.addFamily(family2);
            // 创建表
            admin.createTable(desc); // 创建表
            System.out.println("创建表成功！");
    
        }
    
    
    
        public static void showTable() throws Exception {
            Admin admin = connection.getAdmin(); // hbase表管理
            HTableDescriptor tableDescriptor = admin.getTableDescriptor(table.getName());
            System.out.println("3333");
            byte[] name = tableDescriptor.getName();
            System.out.println("下面开始输出结果：");
            System.out.println("表名：" + new String(name));
            HColumnDescriptor[] columnFamilies = tableDescriptor.getColumnFamilies();
            for (HColumnDescriptor d : columnFamilies)
            {
                System.out.println("列族名：" + d.getNameAsString());
            }
    
        }
    
    
    
        @After
        public static void close() throws Exception {
            table.close();
            connection.close();
        }
    
    }

控制台结果

22:41:56.261 [main] DEBUG org.apache.hadoop.hbase.ipc.BlockingRpcConnection - Connecting to master/192.168.1.101:43115
    3333
    下面开始输出结果：
    表名：dept_test
    列族名：info
    列族名：subdept
    22:41:56.400 [main] INFO org.apache.hadoop.hbase.client.ConnectionManager$HConnectionImplementation - Closing master protocol: MasterService
    22:41:56.400 [main] INFO org.apache.hadoop.hbase.client.ConnectionManager$HConnectionImplementation - Closing zookeeper sessionid=0x16813f9aaff0011
    22:41:56.400 [main] DEBUG org.apache.zookeeper.ZooKeeper - Closing session: 0x16813f9aaff0011
    22:41:56.400 [main] DEBUG org.apache.zookeeper.ClientCnxn - Closing client for session: 0x16813f9aaff0011
    22:41:56.401 [main-SendThread(192.168.1.101:2181)] DEBUG org.apache.zookeeper.ClientCnxn - Reading reply sessionid:0x16813f9aaff0011, packet:: clientPath:null serverPath:null finished:false header:: 5,-11  replyHeader:: 5,334,0  request:: null response:: null
    22:41:56.402 [main-SendThread(192.168.1.101:2181)] DEBUG org.apache.zookeeper.ClientCnxn - An exception was thrown while closing send thread for session 0x16813f9aaff0011 : Unable to read additional data from server sessionid 0x16813f9aaff0011, likely server has closed socket
    22:41:56.402 [main] DEBUG org.apache.zookeeper.ClientCnxn - Disconnecting client for session: 0x16813f9aaff0011
    22:41:56.402 [main] INFO org.apache.zookeeper.ZooKeeper - Session: 0x16813f9aaff0011 closed
    22:41:56.402 [main] DEBUG org.apache.hadoop.hbase.ipc.AbstractRpcClient - Stopping rpc client
    22:41:56.402 [main-EventThread] INFO org.apache.zookeeper.ClientCnxn - EventThread shut down for session: 0x16813f9aaff0011
    
    Process finished with exit code 0

在服务器上客户端链接查看表是否创建

./hbase shell
    hbase(main):001:0> list
    TABLE                                                                                                                                                                                                      
    dept_test                                                                                                                                                                                                  
    user_info                                                                                                                                                                                                  
    2 row(s) in 0.5350 seconds
    
    => ["dept_test", "user_info"]

#### 异常信息 ####

clientPath:null serverPath:null  
HBASE和java客户机没有设置hostname导致zk无法设置服务路径