innobackupex stream corrupted "xb_stream_read_chunk(): wrong chunk magic at offset 0x0"

[[e-mail]]

version : 2.2.5 above
Problem : do not pass chunk magic test
Error Message : xb_stream_read_chunk(): wrong chunk magic at offset 0x0
Command : xbstream -x < backup.xbs -C /backup2
backup option : using xstream option

[mysqld]
datadir = /data/mysql
tmpdir = /data/mytmp
innodb_data_home_dir =
innodb_data_file_path = /data/mysql/ibdata1:100M:autoextend
innodb_log_group_home_dir = /log/innodb-log
........

We do not have set innodb_data_home_dir variables and database is running without any problems.

Restore database using backup set that innodbex with xstream option.

I dug into xbstream source code and find to check chunk magic value. So I open the backup file.

The file start with
"innobackupex:: Warning: Ignored unrecognized line 5 in options : 'innodb_data_home_dir=
'"

It make trouble. anyway I solve this cause.

Solution is modified innobackupex perl script

AS-IS

# unknown
print("$prefix: Warning: Ignored unrecognized line ",
$i + 1,
" in options : '${lines[$i]}'\n"
);
=>
# unknown
print ("$prefix: Warning: Ignored unrecognized line ",
$i + 1,
" in options : '${lines[$i]}'\n"
);

To-BE
# unknown
print("$prefix: Warning: Ignored unrecognized line ",
$i + 1,
" in options : '${lines[$i]}'\n"
);
=>
# unknown
print STDERR ("$prefix: Warning: Ignored unrecognized line ",
$i + 1,
" in options : '${lines[$i]}'\n"
);

[Sergei Glushchenko (sergei.glushchenko)]

version_check may also cause trouble

[Sergei Glushchenko (sergei.glushchenko)]

correction regarding version_check. Its stdout is redirected to stderr before invocation.

[Sergei Glushchenko (sergei.glushchenko)]

https://github.com/percona/percona-xtrabackup/pull/111

[Shahriyar Rzayev (rzayev-sehriyar)]

Percona now uses JIRA for bug reports so this bug report is migrated to: https://jira.percona.com/browse/PXB-1347