Have you uses sp_who/sp_who2/sp_whoisactive or queried sys.dm_exec_connections/sessions or run a trace to see what the SQLAgent session is doing?
Based on the fact that the sp starts with ssrs* I'd guess that this is doing something with reporting services, what is it and does the SQLAgent user have the rights on the SSRS server to do it?
Jack Corbett
Consultant - Straight Path Solutions
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