Hive

技术►Hive , ,

Hive环境搭建

Hadoop

Configuration. Use the following:

  • ~/bash_profile
    edit the file as follows:
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JAVA_HOME=/usr/lib/jvm/java-1.8.0-openjdk-1.8.0.65-3.b17.el7.x86_64
PATH=$JAVA_HOME/bin:$PATH

HADOOP_HOME=/home/test/hadoop/hadoop-2.7.5
PATH=$HADOOP_HOME/bin:$PATH

HIVE_HOME=/home/test/hive/apache-hive-2.3.2
PATH=$HIVE_HOME/bin:$PATH


PATH=$PATH:$HOME/.local/bin:$HOME/bin

export PATH

  • create hdfs dir:
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./hdfs dfs -mkdir /tmp
./hdfs dfs -mkdir -p /hive/warehouse
  • /conf/hive-env.sh:
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HADOOP_HOME=/home/test/hadoop/hadoop-2.7.5

export HIVE_CONF_DIR=/home/test/hive/apache-hive-2.3.2/conf

Hive

  • /conf/hive-site.xml:

use Mysql store metastore：

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<configuration>
    <property>
        <name>hive.metastore.local</name>
        <value>false</value>
    </property>
    <property>
        <name>javax.jdo.option.ConnectionURL</name>
        <value>jdbc:mysql://127.0.0.1:3306/hive?createDatabaseIfNotExist=true</value>
    </property>
    <property>
        <name>javax.jdo.option.ConnectionDriverName</name>
        <value>com.mysql.jdbc.Driver</value>
    </property>
    <property>
        <name>javax.jdo.option.ConnectionUserName</name>
        <value>{mysql.user}</value>
    </property>
    <property>
        <name>javax.jdo.option.ConnectionPassword</name>
        <value>{mysql.password}</value>
    </property>
    <property>  
  	<name>hive.metastore.warehouse.dir</name>  
  	<!--之前hdfs中创建的warehouse文件夹-->  
  	<value>/hive/warehouse</value>  
  	<description>location of default database for the warehouse</description>  
    </property>
    <property>
  	    <name>hive.exec.scratchdir</name>
  	    <!--之前在hdfs中建的tmp文件夹-->
  	    <value>/tmp/hive</value>
    </property>
    <!-- 客户端连接 用户名和密码 -->
    <property>
        <name>hive.server2.thrift.client.user</name>
        <value>test</value>
        <description>Username to use against thrift client</description>
    </property>
    <property>
      <name>hive.server2.thrift.client.password</name>
      <value>test</value>
      <description>Password to use against thrift client</description>
    </property>
</configuration>

Execution

  • Init metastore:
    $ bin/schematool -dbType mysql -initSchema
  • hive:
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$ bin/hive 

hive> show tables;
OK
Time taken: 4.687 seconds
hive> create database test;
OK
Time taken: 0.333 seconds
hive> show databases;
OK
default
test
Time taken: 0.055 seconds, Fetched: 2 row(s)
hive> show tables;
OK
Time taken: 0.05 seconds
hive> 
ive> use test;
OK
Time taken: 0.07 seconds
hive> create table test_1(id int, name string);
OK
Time taken: 0.88 seconds
hive> show tables;
OK
test_1
Time taken: 0.074 seconds, Fetched: 1 row(s)
hive>

– 后台运行:

运行hive之前首先要确保meta store服务已经启动，

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nohup hive --service metastore > metastore.log 2>&1 &

若远程客户端连接到hive数据库，需启动hive service

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nohup hive --service hiveserver2 > hiveserver2.log 2>&1 &

Hadoop安装完后，启动时报
Error: JAVA_HOME is not set and could not be found.

【解决办法】：修改/etc/hadoop/hadoop-env.sh中设JAVA_HOME。应当使用绝对路径。

export JAVA_HOME=$JAVA_HOME //错误，不能这么改

export JAVA_HOME=/usr/java/jdk1.6.0_45 //正确，应该这么改

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