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Support Article

NBAA portal on pre-production environment hangs



After deployment of Pega Next-Best-Action Advisor v7.13 (NBAA) application in pre-production environment, PRPC throws different errors and in the logs it is observed as null exceptions related to harnesses and a "ReadOnly:0" value is reported.

Error Messages

2015-10-08 12:16:34,789 [fault (self-tuning)'] [  STANDARD] [                    ] [      NBAVM:01.01.01] (essWithClass._baseclass.Action) ERROR abc|x.x.x.x user - Failed Show Harness action running on pyDisplayHarness page.
2015-10-08 12:16:34,789 [fault (self-tuning)'] [  STANDARD] [                    ] [      NBAVM:01.01.01] (essWithClass._baseclass.Action) ERROR abc|x.x.x.x user - These are parameters received:
2015-10-08 12:16:34,789 [fault (self-tuning)'] [  STANDARD] [                    ] [      NBAVM:01.01.01] (essWithClass._baseclass.Action) ERROR abc|x.x.x.x user - ReadOnly:0

Steps to Reproduce

Launch NBAA portal.

Root Cause

A configuration issue in the start-up script in the operating environment.


Set -Djava.awt.headless=true to resolve the reported behavior.


Published January 31, 2016 - Updated October 8, 2020

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