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HomeHomeUsing DNN Platf...Using DNN Platf...Administration ...Administration ...Scheduler exception after Upgrade to 7.3.0Scheduler exception after Upgrade to 7.3.0
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6/12/2014 7:03 PM

I'm receiving the following error in the event log every 30 seconds since I upgraded to 7.3.0.  I have shut down all the scheduled events and it still occurs














DefaultDataProvider:DotNetNuke.Data.SqlDataProvider, DotNetNuke


InnerException:Sequence contains more than one matching element







System.InvalidOperationException: Sequence contains more than one matching element
   at System.Linq.Enumerable.Single[TSource](IEnumerable`1 source, Func`2 predicate)
   at DotNetNuke.Services.Scheduling.Scheduler.CoreScheduler.LoadQueueFromTimer()
   at DotNetNuke.Services.Scheduling.Scheduler.CoreScheduler.Start()
New Post
6/12/2014 11:36 PM
it sounds like there are duplicate items in Scheduler table.

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New Post
6/13/2014 2:59 AM

I'm seeing the same issue. I checked the table, no dupe entries.. 

New Post
6/13/2014 6:26 PM
if I look at https://github.com/dnnsoftware/Dnn.Pl... I can see code which attempts to check if the current server executing the scheduled task is a "known" server so it can evaluate if it's running in a server group. If would seem that ServerController.GetServers().Single is returning more than 1 result. I would recommend checking the "webservers" table to see if there is anything odd in there e.g. 2 servers with the same name.

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New Post
6/13/2014 8:04 PM
Yes, there was a dupe server entry in webservers.. the dupe was not enabled.. perhaps the query should take the enabled field into account.
HomeHomeUsing DNN Platf...Using DNN Platf...Administration ...Administration ...Scheduler exception after Upgrade to 7.3.0Scheduler exception after Upgrade to 7.3.0

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