Access denied; you need (at least one of) the PROCESS privilege(s)

在帮一个朋友的数据库导出的时候遇到错误，如下：

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1. [root@iZ252affh68Z ~]# innobackupex –defaults-file=/etc/my.cnf –host=10.51.xxx.xxx —user=xtrabk —password=xxxxxx –stream=tar /tmp | gzip > /mnt/backup/mysql_full/xtra_fullbak_2017-01-20.tar.gz
   
2. 170120 18:21:48 innobackupex: Starting the backup operation
4. IMPORTANT: Please check that the backup run completes successfully.
5.            At the end of a successful backup run innobackupex
6.            prints “completed OK!“.
8. 170120 18:21:48 version_check Connecting to MySQL server with DSN ‘dbi:mysql:;mysql_read_default_group=xtrabackup;host=10.51.xxx.xxx;port=3306;mysql_socket=/mnt/mysql/mysql.sock’ as ‘xtrabk’ (using password: YES).
9. 170120 18:21:48 version_check Connected to MySQL server
10. 170120 18:21:48 version_check Executing a version check against the server...
11. 170120 18:21:51 version_check Done.
12. 170120 18:21:51 Connecting to MySQL server host: 10.51.xxx.xxx, user: xtrabk, password: set, port: 3306, socket: /mnt/mysql/mysql.sock
13. Using server version 5.7.12-log
14. Error: failed to execute query
15. SHOW ENGINE INNODB STATUS: Access denied; you need (at least one of) the PROCESS privilege(s) for th

 根据提示是缺少PROCESS权限，赋予后问题解决

grant process on *.* to xtrabk@’10.51.xxx.xxx’;