Decrypt failed with xtrabackup version 2.4.9

[Rick]

I just upgraded to the newest version of xtrabackup on Centos. I now get a decrypt error:

[root@es01 backup]# xtrabackup --decompress --decrypt=AES256 --encrypt-key-file=/data/config/xtrabackupkey.ini --target-dir=/data/backup/mysql/ --remove-original --parallel=4
xtrabackup version 2.4.9 based on MySQL server 5.7.13 Linux (x86_64) (revision id: a467167cdd4)
171204 18:21:49 [01] decrypting and decompressing ./ibdata1.qp.xbcrypt
171204 18:21:49 [02] decrypting and decompressing ./performance_schema/events_waits_summary_by_host_by_event_name.frm.qp.xbcrypt
171204 18:21:49 [04] decrypting and decompressing ./performance_schema/status_by_host.frm.qp.xbcrypt
171204 18:21:49 [03] decrypting and decompressing ./performance_schema/hosts.frm.qp.xbcrypt
encryption: both encryption key and key file specified.
encryption: both encryption key and key file specified.
encryption: unable to set libgcrypt cipher key - User defined source 1 : Invalid key length
encryption: unable to set libgcrypt cipher key - User defined source 1 : Invalid key length
encryption: both encryption key and key file specified.

I do not use the encrypt-key option, only encrypt-key-file option.

If i change the decrypt command to use encrypt-key=<mykey> option i get the following error:

decrypt: failed to close dest file.
171204 18:28:04 [01] removing ./ibdata1.qp.xbcrypt

The failed to close error is for every removing entry.

[Sergei Glushchenko (sergei.glushchenko)]

Thank you for bug report. --encrypt-key-file seems to broken with xbcrypt. "decrypt: failed to close dest file." doesn't cause any harm, but should be fixed as well.

[Sergei Glushchenko (sergei.glushchenko)]

https://github.com/percona/percona-xtrabackup/pull/465
https://github.com/percona/percona-xtrabackup/pull/466

[Rick (rick1842)]

Thank you for your fast response. I can confirm that the msg "decrypt: failed to close dest file." was no problem. The decryption and preparing of the backup was successful.

[Shahriyar Rzayev (rzayev-sehriyar)]

Percona now uses JIRA for bug reports so this bug report is migrated to: https://jira.percona.com/browse/PXB-518