We could fix the problem. We had a full log partition on our xen host. This coused the problems with the backups. I hope this information helps you.

Sorry, yes we use XCP-NG with the Version 7.6. So I try to restart the Host and after that I will do some Updates.

XenServer Version: 7.6
Backup Log File: 2019-05-02T06_59_08.172Z - backup NG.txt

Im running XOA with license, we got the finished XOA VM.

Hello,

I tried to Backup a VM with BackupNG. Sometimes it worked successfully to backup the VMs with the Deltabackup. But most times the backups failed. So I downlaoded the Log file and there I found an URL to that showed me this Error. I found something in the Internet, that says it is an Database error from Xenserver. But I don't know how to fix it.

Hopefully someone coud help me.
Thanks for your respons

Regards,

Linus

HTTP 500 internal server error
An unexpected error occurred; please wait a while and try again. If the problem persists, please contact your support representative.
Additional information
Db_exn.DBCache_NotFound("missing row", "task", "OpaqueRef:2edce6db-4bd7-4930-9cbb-1b958b89f97e")