hiveserver2连接出错如下：Error: Could not open client transport with JDBC Uri: jdbc:hive2://hadoop01:10000: java.net.ConnectException: Connection refused (Connection refused) (state=08S01,code=0)

hiveserver2连接出错如下：Error: Could not open client transport with JDBC Uri: jdbc:hive2://hadoop01:10000: java.net.ConnectException: Connection refused (Connection refused) (state=08S01,code=0)

1.看hiveserver2服务是否启动

[root@hadoop01 ~]# jps 
5101 RunJar            # 启动正常

2.看Hadoop安全模式是否关闭

[root@hadoop01 ~]# hdfs dfsadmin -safemode get
Safe mode is OFF     # 表示正常

如果为：Safe mode is ON 处理方法见https://www.cnblogs.com/-xiaoyu-/p/11399287.html

3.浏览器打开http://hadoop01:50070/看Hadoop集群是否正常启动

4.看MySQL服务是否启动

[root@hadoop01 ~]# service mysqld status
Redirecting to /bin/systemctl status mysqld.service
● mysqld.service - MySQL 8.0 database server
   Loaded: loaded (/usr/lib/systemd/system/mysqld.service; disabled; vendor preset: disabled)
   Active: active (running) since Sun 2020-01-05 23:30:18 CST; 8min ago
  Process: 5463 ExecStartPost=/usr/libexec/mysql-check-upgrade (code=exited, status=0/SUCCESS)
  Process: 5381 ExecStartPre=/usr/libexec/mysql-prepare-db-dir mysqld.service (code=exited, status=0/SUCCESS)
  Process: 5357 ExecStartPre=/usr/libexec/mysql-check-socket (code=exited, status=0/SUCCESS)
 Main PID: 5418 (mysqld)
   Status: "Server is operational"
    Tasks: 46 (limit: 17813)
   Memory: 512.5M
   CGroup: /system.slice/mysqld.service
           └─5418 /usr/libexec/mysqld --basedir=/usr

Jan 05 23:29:55 hadoop01 systemd[1]: Starting MySQL 8.0 database server...
Jan 05 23:30:18 hadoop01 systemd[1]: Started MySQL 8.0 database server.

Active: active (running) since Sun 2020-01-05 23:30:18 CST; 8min ago 表示启动正常

如没有启动则：service mysqld start 启动mysql

注意注意注意注意注意注意注意注意注意注意注意注意注意注意注意注意注意注意注意注意注意注意注意注意注意注意注意注意注意注意注意注意注意注意注意注意注意注意注意注意注意注意注意注意注意注意注意注意注意注意注意注意注意注意注意注意注意注意注意：

​ 一定要用本地mysql工具连接mysql服务器，看是否能正常进行连接！！！！！(只是检查)

如不能连接看下：

配置只要是root用户+密码，在任何主机上都能登录MySQL数据库。
1．进入mysql
[root@hadoop102 mysql-libs]# mysql -uroot -p000000
2．显示数据库
mysql>show databases;
3．使用mysql数据库
mysql>use mysql;
4．展示mysql数据库中的所有表
mysql>show tables;
5．展示user表的结构
mysql>desc user;
6．查询user表
mysql>select User, Host, Password from user;
7．修改user表，把Host表内容修改为%
mysql>update user set host='%' where host='localhost';
8．删除root用户的其他host
mysql>delete from user where Host='hadoop102';
mysql>delete from user where Host='127.0.0.1';
mysql>delete from user where Host='::1';
9．刷新
mysql>flush privileges;
10．退出
mysql>quit;

检查mysql-connector-java-5.1.27.tar.gz驱动包是否一句放入：/root/servers/hive-apache-2.3.6/lib下面

jdbc:mysql://hadoop01:3306/hive?createDatabaseIfNotExist=true

#查看mysql里面是否有上面指定的库hive   如果 mysql中没有库请看 第 7 步
mysql> show databases;
+--------------------+
| Database           |
+--------------------+
| hive               |
| information_schema |
| mysql              |
| performance_schema |
| sys                |
+--------------------+
5 rows in set (0.01 sec)

3306后面的hive是元数据库，可以自己指定 比如：

jdbc:mysql://hadoop01:3306/metastore?createDatabaseIfNotExist=true

5.看Hadoop配置文件core-site.xml有没有加如下配置

    
        hadoop.proxyuser.root.hosts  -- root为当前Linux的用户，我的是root用户
        * 
    
    
        hadoop.proxyuser.root.groups
        *
    
    


如果linux用户为自己名字 如：xiaoyu
则配置如下：

    
        hadoop.proxyuser.xiaoyu.hosts  
        * 
    
    
        hadoop.proxyuser.xiaoyu.groups
        *
    

​

6.其他问题

# HDFS文件权限问题

  
    dfs.permissions
    false
  

7.org.apache.hadoop.hive.metastore.hivemetaexception: failed to get schema version.

schematool -dbType mysql -initSchema 

8.最后一句 别下载错包

apache hive-2.3.6下载地址：
http://mirror.bit.edu.cn/apache/hive/hive-2.3.6/

Index of /apache/hive/hive-2.3.6
Icon Name Last modified Size Description
[DIR] Parent Directory -
[ ] apache-hive-2.3.6-bin.tar.gz 23-Aug-2019 02:53 221M （下载这个）
[ ] apache-hive-2.3.6-src.tar.gz 23-Aug-2019 02:53 20M

9.重要

所有东西都检查啦，还是出错！！！
jps查看所有机器开启的进程全部关闭，然后 重启 设备，再

开启zookeeper（如果有）

开启hadoop集群

开启mysql服务

开启hiveserver2

beeline连接

配置文件如下，仅供参考，以实际自己配置为准

hive-site.xml

        
                javax.jdo.option.ConnectionURL
                jdbc:mysql://hadoop01:3306/hive?createDatabaseIfNotExist=true
        

        
                javax.jdo.option.ConnectionDriverName
                com.mysql.jdbc.Driver
        
        
                javax.jdo.option.ConnectionUserName
                root
        
        
                javax.jdo.option.ConnectionPassword
                12345678
        
        
                hive.cli.print.current.db
                true
        
        
                hive.cli.print.header
                true
        
        
                hive.server2.thrift.bind.host
                hadoop01
        

        
            hive.metastore.schema.verification
            false
        
        
            datanucleus.schema.autoCreateAll
            true
        

    

core-site.xml

    
    
            fs.defaultFS
          hdfs://hadoop01:9000
    

    
    
            hadoop.tmp.dir
            /root/servers/hadoop-2.8.5/data/tmp
    
    
    
        hadoop.proxyuser.root.hosts
        *
    
    
        hadoop.proxyuser.root.groups
        *
    

hdfs-site.xml

    
        dfs.replication
        3
    

    
    
          dfs.namenode.secondary.http-address
          hadoop03:50090
    
    
        dfs.permissions
        false
    

mapred-site.xml

    
    
            mapreduce.framework.name
            yarn
    
    
    
    
    mapreduce.jobhistory.address
    hadoop03:10020
    
    
    
        mapreduce.jobhistory.webapp.address
        hadoop03:19888
    

yarn-site.xml

    
    
    
        yarn.nodemanager.aux-services
        mapreduce_shuffle
    

    
    
        yarn.resourcemanager.hostname
        hadoop02
    
    
    
    
        yarn.log-aggregation-enable
        true
    

    
    
        yarn.log-aggregation.retain-seconds
        604800
    

原创地址：https://www.cnblogs.com/-xiaoyu-/p/12158984.html