title: SQL Server reporting services scheduler loops, running amok
body: <p>We have a Windows Server 2008 R2, Service Pack 1 with an SQL Server 2008 R2 (Microsoft SQL Server Standard Edition (64-bit), version 10.50.4042.0) for creating scheduled reports in SSRS. The Report Server services didn't start up after a server restart a while ago and when I noticed that after several days, I started the service. Then it began to loop thru all reports constantly, as if the server not was aware of that it had already done that report.</p>
  <p>When I look in the table [ReportServer].[dbo].[ExecutionLogStorage] I can see that new reports are created constantly as fast as the previous report is ready. It looks to loop thru all reports.</p>
  <p>I found two errors in Windows application log which maybe are connected to the problem, or not.</p>
  <blockquote>
  <p>Failed to unload app domain DefaultDomain.  The following exception occurred: Error while unloading appdomain. (Exception from HRESULT: 0x80131015).</p>
  <p>ProcessName: ReportingServicesService
  ProcessId: 4308
  Failed to trace event: System.AppDomainUnloadedException: Attempted to access an unloaded AppDomain.</p>
  </blockquote>
  <p>I really don't understand what to do. The server has been running for several years, doing the scheduled jobs without any problem. I have restarted SQL Server Agent, Reporting Services as well as the whole server and it doesn't make any difference.</p>
  <p>I am thankful for any help.</p>
  <p>Lage</p>