使用 xtrabackup 对MySQL备份，出现了一个问题，大神大神都过来瞧瞧

[风非飞]

++ hostname
+ [[ rm-5c3d4e39066cd-1 =~ -([0-9]+)$ ]]
+ ordinal=1
+ [[ 1 -eq 0 ]]
+ [[ -d /var/lib/mysql/mysql ]]
+ ncat --recv-only rm-5c3d4e39066cd-0.rm-5c3d4e39066cd 3307
+ xbstream -x -C /var/lib/mysql
+ xtrabackup --prepare --no-timestamp --user=repl --password=x8p9fqEpZFiFAuNBaFy2ItgYtnZtc8Kx --target-dir=/var/lib/mysql
xtrabackup version 2.4.4 based on MySQL server 5.7.13 Linux (x86_64) (revision id: df58cf2)
xtrabackup: cd to /var/lib/mysql
xtrabackup: Error: cannot open ./xtrabackup_checkpoints
xtrabackup: error: xtrabackup_read_metadata()
xtrabackup: This target seems not to have correct metadata...
InnoDB: Number of pools: 1
InnoDB: Operating system error number 2 in a file operation.
InnoDB: The error means the system cannot find the path specified.
xtrabackup: Warning: cannot open ./xtrabackup_logfile. will try to find.
InnoDB: Operating system error number 2 in a file operation.
InnoDB: The error means the system cannot find the path specified.
  xtrabackup: Fatal error: cannot find ./xtrabackup_logfile.
xtrabackup: Error: xtrabackup_init_temp_log() failed.

发现会爆这样的错，折现有两个相关连接，但是我看不懂，大神说说

[风非飞]

http://f.dataguru.cn/thread-349952-1-1.html http://www.cnblogs.com/digdeep/p/4946230.html