详解：hiveserver2的使用与介绍

墨蓝 2024-02-19 21:59 54阅读 0赞

在学习的时候我们一般是使用hive的  
客户端使用的是hive

[hadoop@hadoop001 app]$ jps
    19856 RunJar
    15408 DataNode
    15281 NameNode
    15572 SecondaryNameNode
    19993 Jps
    15722 ResourceManager
    15823 NodeManager
    [hadoop@hadoop001 app]$ ps -ef |grep 19856
    hadoop   19856 19819  4 10:08 pts/0    00:00:10 /usr/java/jdk1.8.0_45/bin/java -Xmx256m -Djava.net.preferIPv4Stack=true -Dhadoop.log.dir=/home/hadoop/app/hadoop-2.6.0-cdh5.7.0/logs -Dhadoop.log.file=hadoop.log -Dhadoop.home.dir=/home/hadoop/app/hadoop-2.6.0-cdh5.7.0 -Dhadoop.id.str=hadoop -Dhadoop.root.logger=INFO,console -Djava.library.path=/home/hadoop/app/hadoop-2.6.0-cdh5.7.0/lib/native -Dhadoop.policy.file=hadoop-policy.xml -Djava.net.preferIPv4Stack=true -Xmx512m -Dhadoop.security.logger=INFO,NullAppender org.apache.hadoop.util.RunJar /home/hadoop/app/hive-1.1.0-cdh5.7.0/lib/hive-cli-1.1.0-cdh5.7.0.jar org.apache.hadoop.hive.cli.CliDriver
    hadoop   20008 19968  0 10:12 pts/1    00:00:00 grep --color=auto 19856
    [hadoop@hadoop001 app]$ 
    19856 RunJar可以看到他就是hive的server端

### 注意： ###

在启动hive的时候，你会看到 有一句  
WARNING: Hive CLI is deprecated and migration to Beeline is recommended

[hadoop@hadoop001 bin]$ ./hive
    ls: cannot access /home/hadoop/app/spark-2.4.0-bin-2.6.0-cdh5.7.0/lib/spark-assembly-*.jar: No such file or directory
    which: no hbase in (/home/hadoop/app/sqoop-1.4.6-cdh5.7.0/bin:/home/hadoop/app/spark-2.4.0-bin-2.6.0-cdh5.7.0/bin:/home/hadoop/app/scala-2.11.8/bin:/home/hadoop/app/hive-1.1.0-cdh5.7.0/bin:/home/hadoop/app/hadoop-2.6.0-cdh5.7.0/bin:/usr/java/jdk1.8.0_45/bin:/opt/software/protobuf/bin:/bin:/opt/software/apache-maven-3.3.9/bin:/usr/java/jdk1.8.0_45/bin:/opt/software/apache-maven-3.3.9/bin:/usr/java/jdk1.8.0_45/bin:/usr/java/jdk1.8.0_45/bin:/usr/local/bin:/bin:/usr/bin:/usr/local/sbin:/usr/sbin)
    
    Logging initialized using configuration in jar:file:/home/hadoop/app/hive-1.1.0-cdh5.7.0/lib/hive-common-1.1.0-cdh5.7.0.jar!/hive-log4j.properties
    WARNING: Hive CLI is deprecated and migration to Beeline is recommended.
    hive (default)>

hiveserver2的官网：[https://cwiki.apache.org/confluence/display/Hive/HiveServer2+Clients][https_cwiki.apache.org_confluence_display_Hive_HiveServer2_Clients]

### 介绍 ###

HiveServer2（HS2）是一种允许客户端对Hive执行查询的服务。HiveServer2是HiveServer1的后续 版本，已被弃用。HS2支持多客户端并发和身份验证。它旨在为JDBC和ODBC等开放API客户端提供更好的支持。

HS2是作为组合服务运行的单个进程，其包括基于Thrift的Hive服务（TCP或HTTP）和用于Web UI 的Jetty Web服务器。

### HS2架构 ###

基于Thrift的Hive服务是HS2的核心，负责为Hive查询提供服务（例如，来自Beeline）。Thrift是用于构建跨平台服务的RPC框架。它的堆栈由4层组成：服务器，传输，协议和处理器。您可以在https://thrift.apache.org/docs/concepts找到有关这些图层的更多详细信息。

### hiveserver2作用： ###

1.为hive提供了一种允许客户端远程访问的服务。

2.基于thrift协议，支持跨平台，跨编程语言对hive访问；

3.允许远程访问hive；

### 使用 ###

Beeline Example
    % bin/beeline 
    Hive version 0.11.0-SNAPSHOT by Apache
    beeline> !connect jdbc:hive2://localhost:10000 scott tiger
    !connect jdbc:hive2://localhost:10000 scott tiger 
    Connecting to jdbc:hive2://localhost:10000
    Connected to: Hive (version 0.10.0)
    Driver: Hive (version 0.10.0-SNAPSHOT)
    Transaction isolation: TRANSACTION_REPEATABLE_READ
    0: jdbc:hive2://localhost:10000> show tables;
    show tables;

[hadoop@hadoop001 bin]$ ./beeline
    ls: cannot access /home/hadoop/app/spark-2.4.0-bin-2.6.0-cdh5.7.0/lib/spark-assembly-*.jar: No such file or directory
    which: no hbase in (/home/hadoop/app/sqoop-1.4.6-cdh5.7.0/bin:/home/hadoop/app/spark-2.4.0-bin-2.6.0-cdh5.7.0/bin:/home/hadoop/app/scala-2.11.8/bin:/home/hadoop/app/hive-1.1.0-cdh5.7.0/bin:/home/hadoop/app/hadoop-2.6.0-cdh5.7.0/bin:/usr/java/jdk1.8.0_45/bin:/opt/software/protobuf/bin:/bin:/opt/software/apache-maven-3.3.9/bin:/usr/java/jdk1.8.0_45/bin:/opt/software/apache-maven-3.3.9/bin:/usr/java/jdk1.8.0_45/bin:/usr/java/jdk1.8.0_45/bin:/usr/local/bin:/bin:/usr/bin:/usr/local/sbin:/usr/sbin)
    Beeline version 1.1.0-cdh5.7.0 by Apache Hive
    beeline> !connect jdbc:hive2://hadoop001:10000 hadoop
    scan complete in 1ms
    Connecting to jdbc:hive2://localhost:10000
    Enter password for jdbc:hive2://localhost:10000: ******
    Error: Could not open client transport with JDBC Uri: jdbc:hive2://localhost:10000: java.net.ConnectException: Connection refused (state=08S01,code=0)
    0: jdbc:hive2://hadoop001:10000/default >

**不建议以上的这么使用的方式**

./beeline -u jdbc:hive2://hadoop001:10000/default -n hadoop

注意：在spark中也有beeline 所以在使用的时候，要在当前的bin目录下面使用  
Connecting to jdbc:hive2://hadoop001:10000/default  
这里有这句话。如果是spark就是连接到了spark，

[hadoop@hadoop001 bin]$ ./beeline -u jdbc:hive2://hadoop001:10000/default -n hadoop
    ls: cannot access /home/hadoop/app/spark-2.4.0-bin-2.6.0-cdh5.7.0/lib/spark-assembly-*.jar: No such file or directory
    which: no hbase in (/home/hadoop/app/sqoop-1.4.6-cdh5.7.0/bin:/home/hadoop/app/spark-2.4.0-bin-2.6.0-cdh5.7.0/bin:/home/hadoop/app/scala-2.11.8/bin:/home/hadoop/app/hive-1.1.0-cdh5.7.0/bin:/home/hadoop/app/hadoop-2.6.0-cdh5.7.0/bin:/usr/java/jdk1.8.0_45/bin:/opt/software/protobuf/bin:/bin:/opt/software/apache-maven-3.3.9/bin:/usr/java/jdk1.8.0_45/bin:/opt/software/apache-maven-3.3.9/bin:/usr/java/jdk1.8.0_45/bin:/usr/java/jdk1.8.0_45/bin:/usr/local/bin:/bin:/usr/bin:/usr/local/sbin:/usr/sbin)
    scan complete in 2ms
    Connecting to jdbc:hive2://hadoop001:10000/default
    Connected to: Apache Hive (version 1.1.0-cdh5.7.0)
    Driver: Hive JDBC (version 1.1.0-cdh5.7.0)
    Transaction isolation: TRANSACTION_REPEATABLE_READ
    Beeline version 1.1.0-cdh5.7.0 by Apache Hive
    0: jdbc:hive2://hadoop001:10000/default>
    0: jdbc:hive2://hadoop001:10000/default> show tables;
    
    INFO  : OK
    +----------------------------+--+
    |          tab_name          |
    +----------------------------+--+
    | person                     |
    | ruoze_emp                  |
    | ruoze_helloworld           |
    | ruoze_wc                   |
    | ugc_contract_ext_50104_ex  |
    +----------------------------+--+
    5 rows selected (0.901 seconds)

\[hadoop@hadoop001 bin\]$ ./beeline -u jdbc:hive2://hadoop001:10000/default -n hadoop  
\-u是 数据库的url 要连接的JDBC URL。如果需要，参数值中的特殊字符应使用URL编码进行编码。  
\-n是用户名 要连接的用户名  
\-p是密码

### 换端口： ###

\[hadoop@hadoop001 bin\]$ ./hiveserver2 --hiveconf hive.server2.thrift.port=14000  
配置中寻找这个参数  
当你在用10000连接时是连接不上的

### hiveserver2的配置 ###

官网：[https://cwiki.apache.org/confluence/display/Hive/Setting+Up+HiveServer2][https_cwiki.apache.org_confluence_display_Hive_Setting_Up_HiveServer2]

[https_cwiki.apache.org_confluence_display_Hive_HiveServer2_Clients]: https://cwiki.apache.org/confluence/display/Hive/HiveServer2+Clients
[https_cwiki.apache.org_confluence_display_Hive_Setting_Up_HiveServer2]: https://cwiki.apache.org/confluence/display/Hive/Setting+Up+HiveServer2