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PREO Server Troubleshooting

This article is meant for System Administrators.

Zaid Akel avatar
Written by Zaid Akel
Updated over 10 months ago

Hosting Information

PREO is hosted on XBSAZ-EAOPS30.

This server is currently managed by Steve Palasch, steve.palasch@xerox.com

Application Outage Information

If the PREO Service becomes unresponsive or is not running, users will experience a 502 error.

502 - Web server received an invalid response while acting as a gateway or proxy server.

There is a problem with the page you are looking for, and it cannot be displayed. When the Web server (while acting as a gateway or proxy) contacted the upstream content server, it received an invalid response from the content server.

Resolution Steps:

(Process Lock/Server Resource Issue) (Most likely issue when PREO is down for users)

  1. Check task manager and look for and OpenJDK process using high CPU usage. (Typical symptom)

    1. The process name is generic. It will not say PREO.

  2. Force end the task

  3. Open the Mendix Service Console

  4. Start the Service

(Service Not Started)

  1. Open the “Mendix Service Console”, select “PREO” from the applications list, and check the service status. In the below example, we see “Start” and “Start Service”. This means that the windows service is NOT running.

  2. Click “Start Service”

  3. You will see activity in the console, and once completed the button will change to “Stop Service”. In the example below, the application should be online and ready to go. Test your login page again and confirm.

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