Event ID 10028: DCOM was unable to communicate with the computer...

Hi,

A small post regarding my solution to a problem I encountered today.

Issue:

Backup-jobs have been failing and your DPM-agent is listed as unavalible.

In the Event Viewer on your DPM-server event id 10028 is logged in the System log:

DCOM was unable to communicate with the computer contoso-app01.contoso.local using any of the configured protocols; requested by PID a24 (C:\Program Files\Microsoft System Center 2012\DPM\DPM\bin\msdpm.exe

The first thing you would troubleshoot is if there are any firewalls that are blocking the communication but for my case I knew nothing had change in the communication.

Resolution

1. Open up an elevated command promt and run ipconfig /flushdns.

2. Refresh your agent on the Management-tab in your DPM-console.

3. Re-run any failed DPM-jobs.

A very simple solution in my case to get the jobs working again but there is still some work to find out if there is an issue in the DNS registration in Active Directory.

Take care!

//Markus