hive启动失败的小问题总结以及hive

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如果出现Hive installation issues: Hive metastore database is not initialized

之后你可以运行下面这句话

schematool -dbType mysql -initSchema

之后你有可能发现还是不行,这时候你需要去配置你的hive-site.xml文件以及hive-env.xml文件

以及加载mysql的驱动jar包



如果还有问题,你需要把hive-site.xml文件中的jdbc连接中的主机名改成localhost或者将你的hosts中的127.0.0.1的主机名打开(只是用于单机模式),但是这样你的集群就会出现问题!




Hive只在一个节点上安装即可


1.上传tar包


2.解压
tar -zxvf hive-0.9.0.tar.gz -C /cloud/
3.配置mysql metastore(切换到root用户)
配置HIVE_HOME环境变量
rpm -qa | grep mysql
rpm -e mysql-libs-5.1.66-2.el6_3.i686 --nodeps
rpm -ivh MySQL-server-5.1.73-1.glibc23.i386.rpm 
rpm -ivh MySQL-client-5.1.73-1.glibc23.i386.rpm 
修改mysql的密码
/usr/bin/mysql_secure_installation
(注意:删除匿名用户,允许用户远程连接)
登陆mysql
mysql -u root -p


4.配置hive
cp hive-default.xml.template hive-site.xml 
修改hive-site.xml(删除所有内容,只留一个<property></property>)
添加如下内容:
<property>
 <name>javax.jdo.option.ConnectionURL</name>
 <value>jdbc:mysql://weekend01:3306/hive?createDatabaseIfNotExist=true</value>
 <description>JDBC connect string for a JDBC metastore</description>
</property>


<property>
 <name>javax.jdo.option.ConnectionDriverName</name>
 <value>com.mysql.jdbc.Driver</value>
 <description>Driver class name for a JDBC metastore</description>
</property>


<property>
 <name>javax.jdo.option.ConnectionUserName</name>
 <value>root</value>
 <description>username to use against metastore database</description>
</property>


<property>
 <name>javax.jdo.option.ConnectionPassword</name>
 <value>root</value>
 <description>password to use against metastore database</description>
</property>

5.安装hive和mysq完成后,将mysql的连接jar包拷贝到$HIVE_HOME/lib目录下
如果出现没有权限的问题,在mysql授权(在安装mysql的机器上执行)
mysql -uroot -p
#(执行下面的语句  *.*:所有库下的所有表   %:任何IP地址或主机都可以连接)
GRANT ALL PRIVILEGES ON *.* TO 'root'@'%' IDENTIFIED BY '123' WITH GRANT OPTION;
FLUSH PRIVILEGES;

6.建表(默认是内部表)
create table trade_detail(id bigint, account string, income double, expenses double, time string) row format delimited fields terminated by '\t';
建分区表
create table td_part(id bigint, account string, income double, expenses double, time string) partitioned by (logdate string) row format delimited fields terminated by '\t';
建外部表
create external table td_ext(id bigint, account string, income double, expenses double, time string) row format delimited fields terminated by '\t' location '/td_ext';


7.创建分区表
普通表和分区表区别:有大量数据增加的需要建分区表
create table book (id bigint, name string) partitioned by (pubdate string) row format delimited fields terminated by '\t'; 


分区表加载数据
load data local inpath './book.txt' overwrite into table book partition (pubdate='2010-08-22');

load data local inpath '/root/data.am' into table beauty partition (nation="USA");



select nation, avg(size) from beauties group by nation order by avg(size);

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