xtrabackup 2.1.2  2.1.3 均出现以下问题：

   

xtrabackup: warning: Log block checksum mismatch (block no 191401143 at lsn 3946288081920):
expected 800836998, calculated checksum 800832263
xtrabackup: warning: this is possible when the log block has not been fully written by the server, will retry later

   innobackupex: Error: ibbackup child process has died at /usr/bin/innobackupex line 389.

DBD::mysql::db selectrow_array failed: MySQL server has gone away at /usr/bin/innobackupex line 1325.

   然后就是无限期的等待；

   现象可以解释为子进程把 redolog 跟丢啦，线上的redo log 大小均设置为 1G；

   官方的回复是：升级版本，将redo log 调大；在业务低峰的时候进行备份；

   目前只能把版本升级至2.1.6；

   各位你们是否碰到过类似问题？