Error on launching innobackupex

Hello everyone,

I have an issue when trying to run innobackupex 2.0.8 on a mysql server 5.1.30 - Source distribution - The error is as below.

[root@svr var]# innobackupex --compress --user=bkpuser --password=xxxxxxx --defaults-extra-file=/etc/my.data.cnf /backup/percona/

InnoDB Backup Utility v1.5.1-xtrabackup; Copyright 2003, 2009 Innobase Oy
and Percona LLC and/or its affiliates 2009-2013. All Rights Reserved.

This software is published under
the GNU GENERAL PUBLIC LICENSE Version 2, June 1991.

151125 14:00:52 innobackupex: Starting mysql with options: --defaults-extra-file=“/etc/my.data.cnf” --password=xxxxxxxx --user=‘bkpuser’ --unbuffered –
151125 14:00:52 innobackupex: Connected to database with mysql child process (pid=16599)
151125 14:01:01 innobackupex: Connection to database server closed
IMPORTANT: Please check that the backup run completes successfully.
At the end of a successful backup run innobackupex
prints “completed OK!”.

innobackupex: Using mysql Ver 14.12 Distrib 5.0.77, for redhat-linux-gnu (i386) using readline 5.1
innobackupex: Using mysql server version Copyright (C) 2000-2008 MySQL AB

innobackupex: Created backup directory /backup/percona/2015-11-25_14-01-01
151125 14:01:01 innobackupex: Starting mysql with options: --defaults-extra-file=“/etc/my.data.cnf” --password=xxxxxxxx --user=‘bkpuser’ --unbuffered –
151125 14:01:01 innobackupex: Connected to database with mysql child process (pid=16832)
151125 14:01:04 innobackupex: Connection to database server closed

151125 14:01:04 innobackupex: Starting ibbackup with command: xtrabackup --defaults-extra-file=“/etc/my.data.cnf” --defaults-group=“mysqld” --backup --suspend-at-end --target-dir=/backup/percona/2015-11-25_14-01-01 --tmpdir=/tmp --compress --compress-threads=1
innobackupex: Waiting for ibbackup (pid=16852) to suspend
innobackupex: Suspend file ‘/backup/percona/2015-11-25_14-01-01/xtrabackup_suspended’

xtrabackup version 2.0.8 for Percona Server 5.1.59 pc-linux-gnu (i686) (revision id: 587)
xtrabackup: uses posix_fadvise().
xtrabackup: cd to /home/mysql/var/
xtrabackup: Target instance is assumed as followings.
xtrabackup: innodb_data_home_dir = ./
xtrabackup: innodb_data_file_path = ibdata1:10M:autoextend
xtrabackup: innodb_log_group_home_dir = ./
xtrabackup: innodb_log_files_in_group = 2
xtrabackup: innodb_log_file_size = -4639575577537282048
InnoDB: No valid checkpoint found.
InnoDB: If this error appears when you are creating an InnoDB database,
InnoDB: the problem may be that during an earlier attempt you managed
InnoDB: to create the InnoDB data files, but log file creation failed.
InnoDB: If that is the case, please refer to
InnoDB: [url]http://dev.mysql.com/doc/refman/5.1/en/error-creating-innodb.html[/url]
innobackupex: Error: ibbackup child process has died at /usr/bin/innobackupex line 386.
You have new mail in /var/spool/mail/root

Any ideas how to solve this?