innobackupex-1.5.1 error in backup

Hi,
Im trying to get a full backup from my db’s in my slave server and im using :

$ innobackupex-1.5.1 --slave-info /mnt/data/tmp

and always in the same point show this error :
[01] Copying ./emails/mail_pending_childrens#P#p47.ibd
to /mnt/data/tmp/2011-04-26_12-30-02/emails/mails_pending_child rens#P#p47.ibd
[01] …done
110426 12:45:11 InnoDB: Operating system error number 24 in a file operation.
InnoDB: Error number 24 means ‘Too many open files’.
InnoDB: Some operating system error numbers are described at
InnoDB: http://dev.mysql.com/doc/refman/5.1/en/operating-system-erro r-codes.html
InnoDB: File name /mnt/data/tmp/2011-04-26_12-30-02/emails/mails_pending_child rens#P#p48.ibd
InnoDB: File operation call: ‘create’.
110426 12:45:11 InnoDB: Operating system error number 24 in a file operation.
InnoDB: Error number 24 means ‘Too many open files’.
InnoDB: Some operating system error numbers are described at
InnoDB: http://dev.mysql.com/doc/refman/5.1/en/operating-system-erro r-codes.html
[01] xtrabackup: error: cannot open /mnt/data/tmp/2011-04-26_12-30-02/emails/mails_pending_child rens#P#p48.ibd
[01] xtrabackup: Error: xtrabackup_copy_datafile() failed.
[01] xtrabackup: Warning: failed to copy, but continuing.
110426 12:45:11 InnoDB: Operating system error number 24 in a file operation.
InnoDB: Error number 24 means ‘Too many open files’.
InnoDB: Some operating system error numbers are described at
InnoDB: http://dev.mysql.com/doc/refman/5.1/en/operating-system-erro r-codes.html
110426 12:45:11 InnoDB: Fatal error: cannot open ./emails/mails_pending_childrens#P#p49.ibd
.InnoDB: Have you deleted .ibd files under a running mysqld server?
110426 12:45:11 InnoDB: Assertion failure in thread 1455479104 in file fil/fil0fil.c line 675
InnoDB: Failing assertion: 0
InnoDB: We intentionally generate a memory trap.
InnoDB: Submit a detailed bug report to http://bugs.mysql.com.
InnoDB: If you get repeated assertion failures or crashes, even
InnoDB: immediately after the mysqld startup, there may be
InnoDB: corruption in the InnoDB tablespace. Please refer to
InnoDB: http://dev.mysql.com/doc/refman/5.1/en/forcing-recovery.html
InnoDB: about forcing recovery.
innobackupex-1.5.1: Error: ibbackup child process has died at /usr/bin/innobackupex-1.5.1 line 542.

This is some lines in the my.cnf file :

InnoDB Settings

innodb_file_per_table
innodb_data_home_dir = /mnt/data/innodb/
innodb_data_file_path = dbdata01:750M:autoextend
innodb_log_group_home_dir = /mnt/data/logs/
innodb_buffer_pool_size = 50G
innodb_additional_mem_pool_size = 100M
innodb_log_file_size = 100M
innodb_log_buffer_size = 6M
innodb_flush_log_at_trx_commit = 2
innodb_lock_wait_timeout = 60
innodb_thread_concurrency = 0
innodb_support_xa = 1
innodb_rollback_on_timeout = 1
innodb_flush_method = O_DIRECT
innodb_open_files = 5000
innodb_read_ahead = linear
innodb_read_io_threads = 24
innodb_write_io_threads = 8
innodb_file_format = Barracuda

Any ideas?

You need to increase ulimit -n for the backup user.

Hi, i already changed to double my limits with ulimit -n ###, but its stuck in the same part with the same ptoblem … here what i changed

[root@FNM security]# ulimit -a
core file size (blocks, -c) 0
data seg size (kbytes, -d) unlimited
scheduling priority (-e) 0
file size (blocks, -f) unlimited
pending signals (-i) 999424
max locked memory (kbytes, -l) 32
max memory size (kbytes, -m) unlimited
open files (-n) 2048 <-- Before 1024
pipe size (512 bytes, -p) 8
POSIX message queues (bytes, -q) 819200
real-time priority (-r) 0
stack size (kbytes, -s) 10240
cpu time (seconds, -t) unlimited
max user processes (-u) unlimited
virtual memory (kbytes, -v) unlimited
file locks (-x) unlimited