解决beeline 不能连接 hiveserver2的问题

连接出现如下问题：

[root@centos7-hadoop001 ~]# beeline -u jdbc:hive2://localhost:10000 -n root
Connecting to 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)
Beeline version 1.2.1 by Apache Hive
0: jdbc:hive2://localhost:10000 (closed)> show databases;
No current connection
0: jdbc:hive2://localhost:10000 (closed)> 
0: jdbc:hive2://localhost:10000 (closed)> 

Hive Connecting to beeline from client having various Modes.

1.Embedded Mode: Both Server and Client runs in same machine. No TCP Connection required.

 If hive.server2.authentication is "NONE" in HIVE_HOME/conf/hive-site.xml then connect beeline with below url

Connection URL:
               !connect jdbc:hive2://

2. Remote Mode: It supports multiple clients to execute queries with help of following Authentication schemes.
   Authentication Schemes:

i.)SASL Authentication:

   If value of "hive.server2.authentication" property in HIVE_HOME/conf/hive-site.xml to be set as "SASL" then connect hive beeline with below url

   Beeline URL:
             !connect jdbc:hive2://<host>:<port>/<db>

ii.)NOSASL Authentication:
   If "hive.server2.authentication" is nosasl then connect the beeline like below.
   Beeline URL:

             !connect jdbc:hive2://<host>:<port>/<db>;auth=noSasl

References:

https://docs.hortonworks.com/HDPDocuments/HDP2/HDP-2.3.2/bk_dataintegration/content/beeline-vs-hive-cli.html