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Blank screen and error when opening a person record

In this article, we explain why a blank screen and TooManyResultsException error may occur when opening a person record in Mosaic.

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Written by Yusef Abulaynain

Error:
​TooManyResultsException: Expected one result (or null) to be returned by selectOne(), but found: 2
​gdprconsent.dao.ConsentStatusDAOImpl$AjcClosure19.run(ConsentStatusDAOIm
​pl.java:1)

This is due to duplicate GDPR (General Data Protection Regulation) consent statuses, one cause of this is a known bug around the person merge which was fixed in Mosaic 21.1.0.0 (release notes reference CORM-18028).


This issue may also be related to users logging in twice from separate browsers, which is not supported by Mosaic.
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We have also seen similar errors where the person has not been involved in a merge.
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If you encounter this issue, please raise a case and reference the title of this article.

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