Ironic 裸金属管理服务的网络模型

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reduce端的连接实现
 Failed to stop mariadb.service: Interactive authentication required.
Underlying cause: java.sql.SQLException : Access denied for user 'root'@'s150' (using password: YES)
java.net.ConnectException: Call From s150/192.168.109.150 to s150:8020 failed on connection excepti
启动hive出现 org.apache.hadoop.ipc.RemoteException(org.apache.hadoop.ipc.StandbyExceptio
hive learing_1
在hive中执行sql语句：SemanticException org.apache.hadoop.hive.ql.metadata.HiveException:
MariaDB [(none)]> drop user cr; ERROR 1396 (HY000): Operation DROP USER failed for 'cr'@'%'
ThreadGroupAPI
使用setUncaughtExceptionHandler在线程外面捕获异常