Symptoms

When attempting to activate a plugin, the following message is displayed:

"The Plugin Activation button is not available because the system is currently upgrading"

Release

All

Cause #1. An upgrade is still running. To verify an upgrade is still running go to System Diagnostics --> Upgrade Monitor.

If it's still running, the following will be displayed:

Cause #2. Scheduler workers are not running on the node due to the instance being in 'debug mode'.

If no upgrade is running we will see the following:

Go to /stats.do to determine if the scheduler workers are running on the nodes. If they are running, you will see the following:

Resolution #1. Allow the upgrade to complete

Resolution #2. If no scheduler workers are active on the node, please open an incident with ServiceNow Customer Support.