data_engine won't start and states there is another data_engine probe running

Products

• DX Unified Infrastructure Management (Nimsoft / UIM)

Issue/Introduction

After a Microsoft Cluster failover event, the data_engine probe on the Primary hub server states that there is another data_engine running in the environment.

The 'Data Management default values' section in the GUI is greyed out and not configurable. When you click 'Why are these disabled?', you'll see the following message:

There are multiple data_engine using the same NIS database. Current data_engine is working in a 'secondary' mode, which means it will not perform maintenance. You can not configure maintenance parameters from this instance. 

Current primary data_engine is at: (<probe address>)

Environment

• Release: UIM 8.x, 9.x, 20.x

Cause

There MUST only be 1 active data_engine running in the UIM environment.

The failover event did not happen smoothly and data_engine priority gets confused.

Resolution

1. In the Infrastructure Manager, open the Primary hub data_engine probe's Raw configure menu (SHIFT + right click)
2. Confirm that the 'show_admin_upgrade_primary' key is set to 'yes' (add/edit key if it doesn't exist)
3. Select the data_engine probe and open the probe utility (via Ctrl + P)
4. Using the drop down menu, select 'admin_upgrade_primary'
5. Click the green arrow to execute the command. It should display 'Ok.'

6. Once the call is executed, the 'primary' data_engine is set as shown in the data_engine raw configure screen (data_engine_id = 1)

You should now be able to edit the Data Management default values in the GUI.