Critical Error (Error ID: 6398) in Application log (SharePoint 2010)

Environment: Project Server /SharePoint 2010 

Issue:
The other day i was monitoring our Production servers and found multiple critical errors with the same Error ID in Application log file as shown below

Solution:
If you get this error on around 4:30 AM on daily basis then this is related to Microsoft's Customer Experience Improvement Program aka CEIP. To get it resolve, you have two options as mentioned below.

1- Under Customer Experience Improvement Program select "No, I don't wish to participate" checkbox. You can fix it in the following locations

a) In the Central Admin, go to each Web application within the farm, select the mentioned checkbox available in General Settings option (present on the ribbon section)

b) If the above step does not work then you may need to stop the relavant Timer job service.

For details, you can see the following good blogpost to get this issue fix.

http://ianankers.wordpress.com/2011/08/19/sharepoint-2010-the-execute-method-of-job-definition-microsoft-sharepoint-administration-spsqmtimerjobdefinition-threw-an-exception-event-id-6398/
Hope it helps!