hive-site.xml for hive-0.12.0

原文地址：http://blog.yidooo.net/archives/apache-hive-installation.html

安装前

在安装Hive之前，请保证已经安装了Hadoop。

Apache Hive安装及配置

安装Mysql

本文选用mysql作为Hive的metastore。

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1	sudo yum install mysql-server

• 创建数据库

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1 2	mysql> create database hive; Query OK, 1 row affected (0.00 sec)

• 修改数据库操作权限

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mysql> grant all on hive.* to hive@ '%'  identified by 'hive' ; Query OK, 0 rows affected (0.00 sec)   mysql> flush privileges; Query OK, 0 rows affected (0.00 sec)

Hive安装

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1	tar zcvf hive-0.12.0. tar .gz hive-0.12.0

Hive配置

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cd conf cp hive-default.xml.template hive-site.xml cp hive- env .sh.template hive- env .sh cp hive-log4j.properties.template hive-log4j.properties cp hive- exec -log4j.properties.template hive- exec -log4j.properties

• hive-site.xml

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< property >    < name >javax.jdo.option.ConnectionURL</ name >    < value >jdbc:mysql://localhost:3306/hive</ value >    < description >JDBC connect string for a JDBC metastore</ description > </ property >

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

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

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< property >    < name >javax.jdo.option.ConnectionPassword</ name >    < value >welcome123</ value >    < description >password to use against metastore database</ description > </ property >

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< property >    < name >hive.metastore.schema.verification</ name >    < value >false</ value >     < description >     Enforce metastore schema version consistency.     True: Verify that version information stored in metastore matches with one from Hive jars.  Also disable automatic           schema migration attempt. Users are required to manully migrate schema after Hive upgrade which ensures           proper metastore schema migration. (Default)     False: Warn if the version information stored in metastore doesn't match with one from in Hive jars.     </ description > </ property >

• hive-env.sh

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# Set HADOOP_HOME to point to a specific hadoop install directory HADOOP_HOME= /home/hadoop/hadoop-2 .2.0   # Hive Configuration Directory can be controlled by: export HIVE_CONF_DIR= /home/hadoop/hive-0 .12.0 /conf

安装Mysql JDBC Connector

下载页面：http://www.mysql.com/downloads/connector/j/5.1.html

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1	cp mysql-connector-java-5.1.26-bin.jar to hive /lib

测试

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hive> create table test (key string); OK Time taken: 1.09 seconds

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hive> create table test (key string); hive> show tables; OK test Time taken: 0.084 seconds, Fetched: 1 row(s)

常见错误

错误：ERROR 2002 (HY000): Can’t connect to local MySQL server through socket ‘/var/lib/mysql/mysql.sock’ (2)

解决方法：sudo service mysqld start

错误：ERROR 1044 (42000): Access denied for user ”@’localhost’ to database ‘hive’

解决方法:

[hadoop@zhenlong-master ~]$ mysql -h localhost -u root -p
Enter password:

错误：FAILED: Execution Error, return code 1 from org.apache.hadoop.hive.ql.exec.DDLTask. java.lang.RuntimeException: Unable to instantiate org.apache.hadoop.hive.metastore.HiveMetaStoreClient

这个错误的原因很多，因此需要进行调试。 启动hive带上调试参数，./hive -hiveconf hive.root.logger=DEBUG,console，从调试信息中可以获得错误详细信息。

如果错误信息为：

Caused by: org.datanucleus.exceptions.NucleusException: Attempt to invoke the “BoneCP” plugin to create a ConnectionPool gave an error : The specified datastore driver (“com.mysql.jdbc.Driver”) was not found in the CLASSPATH. Please check your CLASSPATH specification, and the name of the driver.

解决方法：将mysql的jdbc driver拷贝到hive/lib即可。

如果错误信息为：

Caused by: MetaException(message:Version information not found in metastore. )

解决方法：set hive.metastore.schema.verification = false

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< property >    < name >hive.metastore.schema.verification</ name >    < value >false</ value >     < description >     Enforce metastore schema version consistency.     True: Verify that version information stored in metastore matches with one from Hive jars.  Also disable automatic           schema migration attempt. Users are required to manully migrate schema after Hive upgrade which ensures           proper metastore schema migration. (Default)     False: Warn if the version information stored in metastore doesn't match with one from in Hive jars.     </ description >   </ property >