I've seen error event with Event ID 7997 in the Event log. Task category is Information Policy Management.
Error processing policy updates for site http://site for list listname.
Error: System.NullReferenceException: Object reference not set to an instance of an object.
at Microsoft.Office.RecordsManagement.InformationPolicy.ListPolicySettings.get_UseListPolicy() at Microsoft.Office.RecordsManagement.InformationPolicy.Policy.<>c__DisplayClass5.<>c__DisplayClass7.b__1(SPList list) at Microsoft.Office.Server.Utilities.ContentIterator.ProcessLists(SPListCollection lists, ListProcessor listProcessor, ListProcessorErrorCallout errorCallout)
List listname is a part of custom feature.
Initial analysis points to Information management policy timer job.
What could be the cause of this error?
EDIT:
Inner exception is Arithmetic overflow error converting expression to data type int. SQL Server stored procedure: proc_GetDocsMetaInfo