Hive Server 2 安装部署测试

Hive 0.11 包含了Hive Server 1 和 Hive Server 2，还包含1的原因是为了做到向下兼容性。从长远来看都会以Hive Server 2作为首选

1. 配置hive server监听端口和Host

<property>
  <name>hive.server2.thrift.port</name>
  <value>10000</value>
</property>
<property>
  <name>hive.server2.thrift.bind.host</name>
  <value>test84.hadoop</value>
</property>

2. 配置kerberos认证，这样thrift client与hive server 2, hive server 2和hdfs 都由kerberos作认证

<property>
  <name>hive.server2.authentication</name>
  <value>KERBEROS</value>
  <description>
    Client authentication types.
       NONE: no authentication check
       LDAP: LDAP/AD based authentication
       KERBEROS: Kerberos/GSSAPI authentication
       CUSTOM: Custom authentication provider
               (Use with property hive.server2.custom.authentication.class)
  </description>
</property>
<property>
  <name>hive.server2.authentication.kerberos.principal</name>
  <value>hadoop/_HOST@DIANPING.COM</value>
</property>
<property>
  <name>hive.server2.authentication.kerberos.keytab</name>
  <value>/etc/hadoop.keytab</value>
</property>

3. 设置impersonation，这样hive server会以提交用户的身份去执行语句，如果设置为false，则会以起hive server daemon的admin user来执行语句

<property>
  <name>hive.server2.enable.doAs</name>
  <value>true</value>
</property>

执行命令$HIVE_HOME/bin/hive --service hiveserver2 会调用org.apache.hive.service.server.HiveServer2的main方法

hive log中输出日志信息如下：

2013-09-17 14:59:21,081 INFO  server.HiveServer2 (HiveStringUtils.java:startupShutdownMessage(604)) - STARTUP_MSG:
/************************************************************
STARTUP_MSG: Starting HiveServer2
STARTUP_MSG:   host = test84.hadoop/10.1.77.84
STARTUP_MSG:   args = []
STARTUP_MSG:   version = 0.11.0
STARTUP_MSG:   classpath = 略.................
2013-09-17 14:59:21,957 INFO  security.UserGroupInformation (UserGroupInformation.java:loginUserFromKeytab(633)) - Login successful for user hadoop/test84.hadoop@DIANPING.COM using keytab file /etc/hadoop.keytab
2013-09-17 14:59:21,958 INFO  service.AbstractService (AbstractService.java:init(89)) - Service:OperationManager is inited.
2013-09-17 14:59:21,958 INFO  service.AbstractService (AbstractService.java:init(89)) - Service:SessionManager is inited.
2013-09-17 14:59:21,958 INFO  service.AbstractService (AbstractService.java:init(89)) - Service:CLIService is inited.
2013-09-17 14:59:21,959 INFO  service.AbstractService (AbstractService.java:init(89)) - Service:ThriftCLIService is inited.
2013-09-17 14:59:21,959 INFO  service.AbstractService (AbstractService.java:init(89)) - Service:HiveServer2 is inited.
2013-09-17 14:59:21,959 INFO  service.AbstractService (AbstractService.java:start(104)) - Service:OperationManager is started.
2013-09-17 14:59:21,960 INFO  service.AbstractService (AbstractService.java:start(104)) - Service:SessionManager is started.
2013-09-17 14:59:21,960 INFO  service.AbstractService (AbstractService.java:start(104)) - Service:CLIService is started.
2013-09-17 14:59:22,007 INFO  metastore.HiveMetaStore (HiveMetaStore.java:newRawStore(409)) - 0: Opening raw store with implemenation class:org.apache.hadoop.hive.metastore.ObjectStore
2013-09-17 14:59:22,032 INFO  metastore.ObjectStore (ObjectStore.java:initialize(222)) - ObjectStore, initialize called
2013-09-17 14:59:22,955 INFO  metastore.ObjectStore (ObjectStore.java:getPMF(267)) - Setting MetaStore object pin classes with hive.metastore.cache.pinobjtypes="Table,StorageDescriptor,SerDeInfo,Partition,Database,Type,FieldSchema,Order"
2013-09-17 14:59:23,000 INFO  metastore.ObjectStore (ObjectStore.java:setConf(205)) - Initialized ObjectStore
2013-09-17 14:59:23,909 INFO  metastore.HiveMetaStore (HiveMetaStore.java:logInfo(452)) - 0: get_databases: default
2013-09-17 14:59:23,912 INFO  HiveMetaStore.audit (HiveMetaStore.java:logAuditEvent(238)) - ugi=hadoop/test84.hadoop@DIANPING.COM ip=unknown-ip-addr cmd=get_databases: default
2013-09-17 14:59:23,933 INFO  service.AbstractService (AbstractService.java:start(104)) - Service:ThriftCLIService is started.
2013-09-17 14:59:23,948 INFO  service.AbstractService (AbstractService.java:start(104)) - Service:HiveServer2 is started.
2013-09-17 14:59:24,025 INFO  security.UserGroupInformation (UserGroupInformation.java:loginUserFromKeytab(633)) - Login successful for user hadoop/test84.hadoop@DIANPING.COM using keytab file /etc/hadoop.keytab
2013-09-17 14:59:24,047 INFO  thrift.ThriftCLIService (ThriftCLIService.java:run(435)) - ThriftCLIService listening on test84.hadoop/10.1.77.84:10000

可以看到在HiveServer2已经变成一个CompisiteService了，它包含了一组service，包括OperationManager，SessionManager，CLIService，ThriftCLIService。并且在初始化的时候会建立HiveMetaStore连接，并调用get_databases命令来测试。最后启动thrift server，监听在test84.hadoop/10.1.77.84:10000端口上

1. Beeline访问hive server 2

Beeline是hive 0.11引入的新的交互式CLI，它基于SQLLine，可以作为Hive JDBC Client端访问Hive Server 2，启动一个beeline就是维护了一个session。

由于采用了kerberos认证方式，所以需要在本地有kerberos ticket，并且在connection url中指定hive server 2的service principal，此处为principal=hadoop/test84.hadoop@DIANPING.COM，另外用户名和密码可以不用填写，之后的语句会以当前ticket cache中principal的用户身份来执行。

-dpsh-3.2$ bin/beeline
Beeline version 0.11.0 by Apache Hive
beeline> !connect jdbc:hive2://test84.hadoop:10000/default;principal=hadoop/test84.hadoop@DIANPING.COM
scan complete in 2ms
Connecting to jdbc:hive2://test84.hadoop:10000/default;principal=hadoop/test84.hadoop@DIANPING.COM
Enter username for jdbc:hive2://test84.hadoop:10000/default;principal=hadoop/test84.hadoop@DIANPING.COM:
Enter password for jdbc:hive2://test84.hadoop:10000/default;principal=hadoop/test84.hadoop@DIANPING.COM:
Connected to: Hive (version 0.11.0)
Driver: Hive (version 0.11.0)
Transaction isolation: TRANSACTION_REPEATABLE_READ
0: jdbc:hive2://test84.hadoop:10000/default> select count(1) from abc;
+------+
| _c0  |
+------+
| 0    |
+------+
1 row selected (29.277 seconds)
0: jdbc:hive2://test84.hadoop:10000/default> !q
Closing: org.apache.hive.jdbc.HiveConnection

thrift client和server会建立一个session handler，有唯一的HandleIdentifier，由SessionManager Service管理，这也就是Hive server 2支持concurrency的方式。每次操作(会有不同的opType,比如EXECUTE_STATEMEN)会生成独立的OperationHandle，也有各自的HandleIdentifier。用户在beeline中输入"!q"会销毁该session，并且销毁相应的资源

ps : 用下来有点不太爽的是执行mapreduce job时候没有执行过程信息
，如果是一个执行时间很长
的语句，会等很久而没有任何信息反馈
。

2. JDBC方式

hive server 1的driver classname是org.apache.hadoop.hive.jdbc.HiveDriver，Hive Server 2的是
org.apache.hive.jdbc.HiveDriver，这两个容易混淆。

另外可以在connectionUrl中指定HiveConf param和变量，params之间用‘;’分割，params和variables用'#'来隔开。这些都是session级别的，hive在建立完session后，会首先执行set hiveconf key value语句。

比如

jdbc:hive2://test84.hadoop:10000/default?hive.cli.conf.printheader=true#stab=salesTable;icol=customerID

jdbc:hive2://test84.hadoop:10000/default;user=foo;password=bar

示例代码

import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.ResultSet;
import java.sql.ResultSetMetaData;
import java.sql.SQLException;
import java.sql.Statement;

public class HiveTest {

	public static void main(String[] args) throws SQLException {
		try {
			Class.forName("org.apache.hive.jdbc.HiveDriver");
		} catch (ClassNotFoundException e) {
			e.printStackTrace();
		}
		Connection conn = DriverManager
				.getConnection(
						"jdbc:hive2://test84.hadoop:10000/default;principal=hadoop/test84.hadoop@DIANPING.COM",
						"", "");
		Statement stmt = conn.createStatement();
		String sql = "select * from abc";
		System.out.println("Running: " + sql);
		ResultSet res = stmt.executeQuery(sql);
		ResultSetMetaData rsmd = res.getMetaData();
		int columnCount = rsmd.getColumnCount();
		for (int i = 1; i <= columnCount; i++) {
			System.out.println(rsmd.getColumnTypeName(i) + ":"
					+ rsmd.getColumnName(i));
		}

		while (res.next()) {
			System.out.println(String.valueOf(res.getInt(1)) + "\t"
					+ res.getString(2));
		}
	}
}

如果kerberos认证有问题的话，可以在起client jvm时候增加JVM option "
-Dsun.security.krb5.debug=true"来查看详细信息

参考链接:

http://blog.cloudera.com/blog/2013/07/how-hiveserver2-brings-security-and-concurrency-to-apache-hive/

http://www.cloudera.com/content/cloudera-contddent/cloudera-docs/CDH4/4.2.0/CDH4-Security-Guide/cdh4sg_topic_9_1.html

https://cwiki.apache.org/confluence/display/Hive/HiveServer2+Clients

https://github.com/apache/hive/blob/trunk/service/if/TCLIService.thrift

http://www.cloudera.com/content/cloudera-content/cloudera-docs/CDH4/4.2.0/CDH4-Installation-Guide/cdh4ig_topic_18_5.html

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，转载请注明