Question

我在hadoop的同一台服务器上安装了hive，MySQL和CENT OS。我还设置了MySQL和用户ID - hive可以通过以下步骤访问数据库。

mysql> CREATE DATABASE metastore;
mysql> USE metastore;

mysql> SOURCE $HIVE_HOME/scripts/metastore/upgrade/mysql/hive-schema-0.10.0.mysql.sql;

mysql> CREATE USER 'hiveuser'@'%' IDENTIFIED BY 'hivepassword'; 

mysql> GRANT all on *.* to 'hiveuser'@localhost identified by 'hivepassword';

mysql>  flush privileges;

我的Hive-site.xml文件属性如下：

<property>
<name>javax.jdo.option.ConnectionURL</name>
<value>jdbc:mysql://localhost/metastorecreateDatabaseIfNotExist=true</value>
<description>metadata is stored in a MySQL server</description>
</property>

<property>
<name>javax.jdo.option.ConnectionDriverName</name>
<value>com.mysql.jdbc.Driver</value>
<description>MySQL JDBC driver class</description>
</property>

<property>
<name>javax.jdo.option.ConnectionUserName</name>
<value>hiveuser</value>
<description>user name for connecting to mysql server</description>      
</property>

<property>
<name>javax.jdo.option.ConnectionPassword</name>
<value>hivepassword</value>
<description>password for connecting to mysql server</description>
</property>

<property>
<name>hive.metastore.warehouse.dir</name>
<value>/user/hive/warehouse</value>
<description> warehouse </description>
</property>

当我在hive shell内提供 show tables命令时，我收到以下错误：

蜂房＆GT;显示表; FAILED：元数据错误：java.lang.RuntimeException：无法实例化 org.apache.hadoop.hive.metastore.HiveMetaStoreClient FAILED：执行错误，从org.apache.hadoop.hive.ql.exec.DDLTask返回代码1

我在互联网上搜索了所有内容，但无法找到问题的解决方案。有人可以指导我，我在这里缺少什么？

Answer 1

1. First just check your hadoop daemons. All are up or not.

2. Else restart your hadoop cluster once.

3. Have you copied the jar (mysql-connector-java.***) into Hive's lib dir?

4. Which mysql version you are using. If it is very old then :

   mysql>alter database metastore_Db character set latin1;

 I think step 1 and 2 will solve your problem.

配置单元中的元数据出错

1 个答案: