DRAFT KB-XXXX "Failed to register catchup" and "Could not publish rules" error seen in application server log

Symptoms

Some users will report the following errors in the application server log when attempting to use a custom component plugin.

YYYY-MM-DD HH-MM-SS [Appian Work Item - <WORK_ITEM_NUMBER> - <ENGINE_NAME> : CatchupRequest] 
ERROR com.appiancorp.process.engine.CatchupRequest - Failed to register catchup (2), can retry java.lang.NullPointerException

YYYY-MM-DD HH-MM-SS [Appian Work Item - <WORK_ITEM_NUMBER> - <ENGINE_NAME> : PublishRuleRequest] 
ERROR com.appiancorp.process.engine.PublishRuleRequest - Could not publish rules java.lang.NullPointerException

Cause

Action

Workaround

Affected Versions

Last Reviewed: March 2019