I had this weird issue after migrating the reporting server database to a new server.
The migration was pretty smooth, but after I started the reporting service in the new server, users will receive the same report subscription emails every 40-50 seconds.
For now I have removed the SMTP settings, so that the subscriptions will keep running, just no emails will be sent.
I have done the following:
- Check the history of SQL Server Agent job. It looks ok, the job was ran daily at 8am.
- Then I query the [ExecutionLog3] view, I can see the subscription has been executed multiple times.
So my question is: if the SQL Server Agent job didn't generate those reports, what else is generating those reports and executing those subscriptions?
Thanks in advance!
20150506: I made a screenshot to explain the problem:

ReportServer.dbo.Event. In normal it must be empty. If the table will have records, it can mean that stored procedureDeleteEventwas damaged during migration. - Indian