Intermittent backup failure for one site only – firewall connection error - Enhance Control Panel

Intermittent backup failure for one site only – firewall connection error

ankit5

Hi everyone,

I am seeing an intermittent backup issue and would like to understand what might be causing it.

I have a pool of 5 servers, where one server is the master and this master server stores backups as well . Backups generally work fine across all servers and sites. However, once in a while, only one specific site fails, while all other sites on the same servers back up successfully.

The failure is not consistent. On the next run, the same site may back up without any changes.
This is the error message I get when it fails:
Enhance backup failed: Error { kind: Internal, msg: "Cannot connect to https://IP:50000, check firewall" }

What makes this confusing is:
The firewall configuration is unchanged
Other sites on the same server back up successfully at the same time
The issue happens randomly and only affects one site at a time

Has anyone seen similar behavior in a multi-server setup with a master node? Any ideas on what logs or checks I should focus on would be appreciated.

Thanks in advance.

Vendoz

I had a similar problem a few days ago and it drove me crazy.

To see if you've had the same problem as me, I'll ask you one question: are you having problems only on that site, because it's the largest (and therefore the backup takes longer), or are there other more complex sites that are backed up well, however?

ankit5

Hi, Vendoz
There are larger and more complex sites than this one, and they back up successfully. This failure is completely random. It can happen on any site, on any day, without a clear pattern.