mysql5.7.18备份恢复新建实例启动失败

• 报错信息

1. [root@host-192-168-1-128 mysql5.7.18]# /home/program/mysql5.7.18/bin/mysqld_safe --defaults-file=/home/program/mysql5.7.18/my.cnf --user=mysql
2. 2017-05-24T02:41:30.843275Z mysqld_safe error: log-error set to '/home/program/mysql5.7.18/mysqld.log', however file don't exists. Create writable for user 'mysql'.

• 配置

1. [mysqld_safe]
2. # Increase the amount of open files allowed per process. Warning: Make
3. # sure you have set the global system limit high enough! The high value
4. # is required for a large number of opened tables
5. open-files-limit = 8192
6. log-error=/home/program/mysql5.7.18/mysqld.log
7. pid-file=/home/program/mysql5.7.18/mysqld.pid

• 解决方法

1. [root@host-192-168-1-128 mysql5.7.18]# touch mysqld.log
2. [root@host-192-168-1-128 mysql5.7.18]# chown mysql：mysql mysqld.log
3. [root@host-192-168-1-128 mysql5.7.18]# /home/program/mysql5.7.18/bin/mysqld_safe --defaults-file=/home/program/mysql5.7.18/my.cnf --user=mysql &
4. [root@host-192-168-1-128 mysql5.7.18]# ps -ef|grep mysql |grep -v grep
5. root 8053 1 0 22:52 ? 00:00:00 /bin/sh /home/program/mysql5.7.18/bin/mysqld_safe --defaults-file=/home/program/mysql5.7.18/my.cnf --user=mysql
6. mysql 9022 8053 0 22:52 ? 00:00:00 /home/program/mysql5.7.18/bin/mysqld --defaults-file=/home/program/mysql5.7.18/my.cnf --basedir=/home/program/mysql5.7.18 --datadir=/home/data/mysql --plugin-dir=/home/program/mysql5.7.18/lib/plugin --user=mysql --log-error=/home/program/mysql5.7.18/mysqld.log --open-files-limit=8192 --pid-file=/home/program/mysql5.7.18/mysqld.pid --socket=/home/program/mysql5.7.18/mysql.sock --port=3306

• 参考bug详情 
  https://bugs.mysql.com/bug.php?id=84427