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WSUS synchronization fails with HTTP Error 503

Updated June 28, 2018

Overview

When you initialize an update task with WSUS, the following error appears:

HTTP Error 503. The service is unavailable.

Environment

Patch Manager 2.1.0.1087

Cause

  • The WsusPool Application Pool in IIS is in a Stopped state. 
  • The Private Memory Limit (KB) for the Application Pool is set to the default value of 1843200 KB.

Resolution

Consult with your systems administrator before you perform this procedure.

  1. Open the IIS Manager.
  2. Expand your site to find Application Pools.
  3. In the center pane, select WsusPool.
  4. In the Actions pane, click Start.
  5. Increase the Private Memory Limit to 4GB (4000000 KB). 
    1. Stop the EminentWare Data Grid Server Service.
    2. In the center pane, select WsusPool.
    3. Under Edit Application Pool, click Advanced Settings.
    4. Manually set the Private Memory Limit to 4GB (4000000 KB).
  6. Restart the Application Pool.
  7. Stop the EminentWare Data Grid Server Service.

 

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