我正在尝试在Red Hat 5上以伪分布式模式使用CDH4设置Cloudera Impala.我使用JDBC连接到

MySQL Metastore的Hive,但是我在使用JDBC设置Impala时遇到了麻烦.我一直在按照这里的说明操作：

http://www.cloudera.com/content/cloudera-content/cloudera-docs/Impala/latest/Installing-and-Using-Impala/ciiu_impala_jdbc.html

我已将JAR解压缩到一个目录,并将该目录包含在$CLASSPATH中.我还在$CLASSPATH中包含/usr/lib / hive / lib,它有mysql-connector-java-5.1.25-bin.jar.

在我的Hive和Impala conf目录中,我有hive-site.xml,包括以下属性：

javax.jdo.option.ConnectionURL

jdbc:mysql://localhost/metastore

javax.jdo.option.ConnectionDriverName

com.mysql.jdbc.Driver

javax.jdo.option.ConnectionUserName

hiveuser

javax.jdo.option.ConnectionPassword

password

datanucleus.autoCreateSchema

false

datanucleus.fixedDatastore

true

但是当我运行sudo service impala-server restart时,服务器日志出现此错误：

ERROR common.MetaStoreClientPool: Error initializing Hive Meta Store client

javax.jdo.JDOFatalInternalException: Error creating transactional connection factory

它说的原因是：

Caused by: org.datanucleus.store.rdbms.datasource.DatastoreDriverNotFoundException: 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.

at org.datanucleus.store.rdbms.datasource.dbcp.DBCPDataSourceFactory.makePooledDataSource(DBCPDataSourceFactory.java:80)

at org.datanucleus.store.rdbms.ConnectionFactoryImpl.initDataSourceTx(ConnectionFactoryImpl.java:144)

... 57 more

我是否缺少使用JDBC配置Impala的步骤？

我通过将mysql-connector-java-5.1.25-bin.jar复制到/ var / lib / impala来修复此问题 – 启动脚本由于某种原因告诉类路径在这里查找连接器jar.