Are you using any response scripts like command line notifications – which execute a powershell in response to an alert?  Do you have any product connectors that are running under the SDK account context?  Are you using any schedule tasks to run alert updates of any kind?  Are you using a batched, scheduled, or automated maintenance mode application/MP?

I was checking the Operations Manager event log on the RMS and I noticed that event id 26328 is happening about once per minute, each occurrence being followed 6-7 sections later by 26329.
 
Event ID: 26328
Source: OpsMgr SDK Service
Type: Information
Description:
A new client has connected.
UserName: DOMAIN\SDKAccount
SessionId: uuid: xxxxxxx
 
Event ID: 26329
Source: OpsMgr SDK Service
Type: Information
Description:
A client has disconnected.
UserName: DOMAIN\SDKAccount
SessionId: uuid: xxxxxxx
 
Any ideas on how to troubleshoot this issue or why the SDK Account might be connecting and disconnecting so often?

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