DRAFT KB-XXXX Appian services fail to start with InvalidKLicenseException

Symptoms

Appian services fail to start with the following type of error observed in the service_manager.log:

[KomodoEventBus-16] ERROR com.appian.komodo.engine.connection.NettyKConnection - Failed to connect to channels.
com.appian.komodo.engine.connection.InvalidKLicenseException: channels failed to start due to an invalid K license.
at com.appian.komodo.engine.connection.KProcessManager.startK(KProcessManager.java:82) ~[core-1.95.2.jar:1.95.2]

Cause

This happens when an invalid product license is used to start Appian services.

Action

Request and install a new product license as described in this documentation.

Affected Versions

This article applies to Appian 17.3 and later.