3.9 下载驱动,并将驱动复制到hive_home／lib类库

mysql-connector-Java-5.1.31-bin.jar

3.10 启动Hive

3.11 在Ｈive中创建表

3.12 登录mysql，访问hive数据库

3.13 删除Hive中的表

3.14 登录mysql,查询TBLS中的数据

４. 总结

通过以上的步骤，我们完整的安装了一个Hive，并通过添加和删除一张数据库表的演示，来展示了Hive和Mysql元数据库之间的关系操作。

５. 常见问题

５.1 直接通过hive命令来启动，则会出现一下错误信息：

Logging initialized using configuration in jar:file:/opt/apache-hive-0.13/lib/hive-common-0.13.1.jar!/hive-log4j.properties

Exception in thread "main" java.lang.RuntimeException: java.lang.RuntimeException: Unable to instantiate org.apache.Hadoop.hive.metastore.HiveMetaStoreClient

at org.apache.hadoop.hive.ql.session.SessionState.start(SessionState.java:346)

at org.apache.hadoop.hive.cli.CliDriver.run(CliDriver.java:681)

at org.apache.hadoop.hive.cli.CliDriver.main(CliDriver.java:625)

at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)

at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)

at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)

at java.lang.reflect.Method.invoke(Method.java:483)

at org.apache.hadoop.util.RunJar.main(RunJar.java:160)

Caused by: java.lang.RuntimeException: Unable to instantiate org.apache.hadoop.hive.metastore.HiveMetaStoreClient

at org.apache.hadoop.hive.metastore.MetaStoreUtils.newInstance(MetaStoreUtils.java:1412)

at org.apache.hadoop.hive.metastore.RetryingMetaStoreClient.(RetryingMetaStoreClient.java:62)

at org.apache.hadoop.hive.metastore.RetryingMetaStoreClient.getProxy(RetryingMetaStoreClient.java:72)

at org.apache.hadoop.hive.ql.metadata.Hive.createMetaStoreClient(Hive.java:2453)

at org.apache.hadoop.hive.ql.metadata.Hive.getMSC(Hive.java:2465)

at org.apache.hadoop.hive.ql.session.SessionState.start(SessionState.java:340)

... 7 more

Caused by: java.lang.reflect.InvocationTargetException

at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)

at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:62)

at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)

at java.lang.reflect.Constructor.newInstance(Constructor.java:408)

at org.apache.hadoop.hive.metastore.MetaStoreUtils.newInstance(MetaStoreUtils.java:1410)

... 12 more

Caused by: MetaException(message:Could not connect to meta store using any of the URIs provided. Most recent failure: org.apache.thrift.transport.TTransportException: java.net.ConnectException: Connection refused

at org.apache.thrift.transport.TSocket.open(TSocket.java:185)

at org.apache.hadoop.hive.metastore.HiveMetaStoreClient.open(HiveMetaStoreClient.java:336)

at org.apache.hadoop.hive.metastore.HiveMetaStoreClient.(HiveMetaStoreClient.java:214)

at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)

at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:62)

at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)

at java.lang.reflect.Constructor.newInstance(Constructor.java:408)

at org.apache.hadoop.hive.metastore.MetaStoreUtils.newInstance(MetaStoreUtils.java:1410)

at org.apache.hadoop.hive.metastore.RetryingMetaStoreClient.(RetryingMetaStoreClient.java:62)

at org.apache.hadoop.hive.metastore.RetryingMetaStoreClient.getProxy(RetryingMetaStoreClient.java:72)

at org.apache.hadoop.hive.ql.metadata.Hive.createMetaStoreClient(Hive.java:2453)

at org.apache.hadoop.hive.ql.metadata.Hive.getMSC(Hive.java:2465)

at org.apache.hadoop.hive.ql.session.SessionState.start(SessionState.java:340)

at org.apache.hadoop.hive.cli.CliDriver.run(CliDriver.java:681)

at org.apache.hadoop.hive.cli.CliDriver.main(CliDriver.java:625)

at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)

at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)

at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)

at java.lang.reflect.Method.invoke(Method.java:483)

at org.apache.hadoop.util.RunJar.main(RunJar.java:160)

Caused by: java.net.ConnectException: Connection refused

at java.net.PlainSocketImpl.socketConnect(Native Method)

at java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.java:345)

at java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java:206)

at java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:188)

at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:392)

at java.net.Socket.connect(Socket.java:589)

at org.apache.thrift.transport.TSocket.open(TSocket.java:180)

... 19 more

)

at org.apache.hadoop.hive.metastore.HiveMetaStoreClient.open(HiveMetaStoreClient.java:382)

at org.apache.hadoop.hive.metastore.HiveMetaStoreClient.(HiveMetaStoreClient.java:214)

... 17 more

解决办法：　hive --service metastore , 用这条命令来启动hive。

5.2 配置 hive.metastore.uris

a.不启动metastore和hiveserver服务

直接命令行hive进入hive shell环境，然后执行show databases 报错如下：

ERROR ql.Driver: 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

b.第二种种情况

1.配置 hive.metastore.uris

2.启动metastore服务 hive --service metastore

然后直接命令行hive进入hive shell环境，然后执行show databases

c：第三种情况

1.注释配置项 hive.metastore.uris

2.不启动metastore服务

然后直接命令行hive进入hive shell环境，然后执行show databases

Hive 的详细介绍：请点这里

Hive 的下载地址：请点这里