child process has died at innobackupex line 2642

I have recently installed the Parcona Xtrabackup and while running the backup using below command it is giving an error

./innobackupex --user=dbabackup --defaults-file=/usr/local/mysql/mysql5530/my.cnf --datadir=/mysqldb/data/K4TST /mysqldb/backups/K4TST

innobackupex: Error: The xtrabackup child process has died at ./innobackupex line 2642.


What version of MySQL server & xtrabackup you are using ? can you please paste innobackupex log to identify the problem.

MySQL version 5.5.30 and [COLOR=#252C2F]xtrabackup version is InnoDB Backup Utility v1.5.1-xtrabackup.

Log file is attached.

What I found is /var/lib/mysql directory is what it is taking as the data directory but in our case it is different.

percona_upload 2.txt (15.7 KB)

percona_upload.txt (15.6 KB)

Any help on this is greatly appreciated.


I was able to resolve this issue by providing defaults-group name

./innobackupex --defaults-file=/usr/local/mysql/mysql5530/my.cnf --defaults-group=mysqld1 --user=dbabackup /mysqlb/backups/K4TST

I am getting below error when I freshly installed the mysql on new server.

SELF@slcnpny050:/usr/local/mysql/PXB/bin>./innobackupex --defaults-file=/usr/local/mysql/mysql55/my.cnf --defaults-group=mysqld1 --user=dbabackup /mysqldb/backups/SELF

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.

Get the latest version of Percona XtraBackup, documentation, and help resources:
[url]Percona XtraBackup - MySQL Database Backup Software

140228 11:50:21 innobackupex: Connecting to MySQL server with DSN ‘dbi:mysql:;mysql_read_default_file=/usr/local/mysql/mysql55/my.cnf;mysql_read_default_group=xtrabackup’ as ‘dbabackup’ (using password: NO).
innobackupex: Error: Failed to connect to MySQL server as DBD::mysql module is not installed at ./innobackupex line 2976.

Any clue as to what could be the issue?


Hi Himanshu,

Have you install/upgrade xtrabackup with tarball? because if you have installed through yum/apt then it should install necessary libs to satisfy dependencies.
Can you try to install DBD::mysql with either “yum install perl-DBD-MySQL” OR with CPAN and check?

I have the same issue :
innobackupex: Error: Support for MySQL 5.1 with builtin InnoDB (not the plugin) was removed in Percona XtraBackup 2.1. The last version to support MySQL 5.1 with builtin InnoDB was Percona XtraBackup 2.0.
I have : percona-xtrabackup x86_64 2.1.8-733.rhel6 version install from the repository and mysql server 5.1.73.