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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
The errors will also be seen in the respective engine logs.
Cause
Action
Workaround
Affected Versions
Last Reviewed: March 2019