Code review comment for lp:~sergei.glushchenko/percona-xtrabackup/xb21-partial

http://jenkins.percona.com/job/merge-XB-2.1-staging/5/BUILD_TYPE=release,Host=centos5-64,xtrabackuptarget=innodb51/
and
http://jenkins.percona.com/job/merge-XB-2.1-staging/4/BUILD_TYPE=release,Host=centos5-64,xtrabackuptarget=innodb51/

failes on centos5-64 pretty consistently.

tail of log is:
121228 8:01:44 InnoDB Plugin 1.0.17 started; log sequence number 59404

[notice (again)]
  If you use binary log and don't use any hack of group commit,
  the binary log position seems to be:
InnoDB: Last MySQL binlog file position 0 1295, file name ./mysql-bin.000001

xtrabackup: starting shutdown with innodb_fast_shutdown = 1
121228 8:01:44 InnoDB: Starting shutdown...
121228 8:01:50 InnoDB: Shutdown completed; log sequence number 59404
121228 08:01:50 innobackupex: completed OK!
2012-12-28 08:01:50: ib_part_include.sh: Backup taken
2012-12-28 08:01:55: ib_part_include.sh: xtrabackup --stats does not work
2012-12-28 08:01:55: run.sh: Found a leftover mysqld processes with PID 22558, stopping it
2012-12-28 08:01:55: run.sh: Found a leftover mysqld processes with PID 11276, stopping it