由于把hadoop的以下配置项

<property>

<name>fs.defaultFS</name>

<value>hdfs://localhost:9000</value>

</property>

改为

<property>

<name>fs.defaultFS</name>

<value>hdfs://192.168.65.128:9000</value>

</property>

导致hive select的时候出现以下错误：

SemanticException Unable to determine if hdfs://localhost:9000/user/hive/warehouse/t1.db/student is encrypted: org.apache.hadoop.hive.ql.metadata.HiveException: java.net.ConnectException: Call From localhost/127.0.0.1 to localhost:9000 failed on connection exception: java.net.ConnectException: Connection refused; For more details see: http://wiki.apache.org/hadoop/ConnectionRefused

这种情况一般是hive的数据存储路径不对，直接去mysql里修改hive的原数据就可以：

mysql执行如下命令：

use hive;

update DBS set DB_LOCATION_URI=REPLACE (DB_LOCATION_URI,'localhost','192.168.65.128')

update SDS set LOCATION=REPLACE (LOCATION,'localhost','192.168.65.128');

借鉴： https://www.jianshu.com/p/82342ed00f5a