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Excessive logging of type "ERROR" observed in the application server log


The application server log has the following error message repeated throughout:

ERROR - logging data in ThreadLocal was set to null. It should have been properly initialized

No error is observed on the user interface.


This issue has been addressed via AN-123928 in the following hotfixes/versions:



Apply the latest hotfix to your Appian installation or upgrade to the latest version of Appian. 

Affected Versions

This article applies to Appian 17.3 and later.

Last Reviewed: March 2019