Issue with Agent backup since upgrade 3/2.1

[pj888888888888]

So I applied upgrade 3, and upgraded my agents to 2.1, and since doing that the jobs fail (well they dont even run, the just start and stay running until forcefully cancelled)
I'm a bit stumped as theres no real place to start looking at this being the only error is when i kill the job.

Has anyone else ran into this issue?
I have an SR open over this #02460268

[Dima P.]

Hello Paul,

Can you please check if Veeam B&R DNS name is resolved correctly from the agent side?

[pj888888888888]

Yeah its resolving as it should be.
The tech said he saw this error:
[09.01.2018 05:32:33] <17> Error Cannot connect to a backup server BackupServer. Please contact your Veeam Backup & Replication administrator.

He suggested that I make sure that the rescan job works, which it does, making this even more......odd.

[pj888888888888]

So this situation appears to be getting worse, I upgraded another site last night, but omitted upgrading the agents and now all the agent backups in that site are now saying they can't connect to the Veeam server.
I'm not sure if I overlooked it, but did the ports change for the agent to communicate on?

I'm halting anymore upgrades until I get this fixed as its pretty bad right now.

[Dima P.]

Paul,

I'm not sure if I overlooked it, but did the ports change for the agent to communicate on?

You must have Files and Printers feature enabled on the client computer (please double check it) and ports from this article opened.

[ThomasT]

Hi,

Anyone have this solution ? i faced the same error.