On-Premises - Service Unavailable (503)

  • Updated on Sep 10, 2025
  • Published on Sep 24, 2021
  • 1 minute(s) read
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Issue

You try to launch the Real-Time DX Console and receive the following error:
the request failed with http status 503: service unavailable error message

Root Cause

The IIS application pools are not available.
application pools screen

Solution

The service account's (used during the on-premises installation) password changes (e.g every 3 months policy). When the service account's password changes, the application pool can't be started.

To resolve the issue, you must change the password for each application pool, and then restart the IIS service, for example:
application pools screen with advanced settings popup

There are cases where you will need to add the service account to the Performance Log Users local group of the ControlUp Server On-Premises, so that the service account is able to start the application code.