Problem
Noticed that Workflows / Discovery tasks were stuck pending.
Issue
we are using an authenticated proxy and found that in the Application logs we were seeing the below error.
Error processing 'CheckJobQueue - domainx.Internal - Agent1' activity.
System.Net.WebException: The remote server returned an error: (407) Proxy Authentication Required.
at CDS.Library.WebAPI.ApiClient2.CheckResponse(IRestResponse response, Method method, String resource)
at CDS.Library.WebAPI.ApiClient2.ExecuteAndCheck(Method method, String resource, Object content, Stream outputStream)
at CDS.Library.WebAPI.ApiClient2.Execute[T](Method method, String resource, Object content)
at CDS.Model.AgentWebServices2.GetAgent(Guid agentGuid)
at CDSAgentService.Activity.Connect()
at CDSAgentService.Activity.ProcessActivity()
No changes to Service accounts or proxy configuration
Cause
we noticed that just prior to the failures, that the DS Agent auto upgrade occurred Auto-upgrade: Upgrading from version 20.12.15.28713 to 20.12.17.4216
Resolution
The only way we resolved at this point was to remove and re-install the original version 20.12.15.28713. (Behavior reported to MAC Team for Information)