Appending additional characters to an impersonated user's URL throws extensive log errors

Issue

• When appending the URL of an impersonated user with additional characters such as: 

https://localhost:8080/?doAsUserId=DgRTAxLTk7k%253D%3Fcta%3Dcta-menu%3Fcta%3Dcta-menu%3Fcta%3Dcta-menu%3Fcta%3Dcta-menu%3Fcta%3Dcta-menu%3Fcta%3Dcta-menu%3Fcta%3Dcta-menu%3Fcta%3Dcta-menu%3Fcta%3Dcta-menu%3Fcta%3Dcta-menu%3Fcta%3Dcta-menu%3Fcta%3Dcta-menu%3Fcta%3Dcta-menu%3Fcta%3Dcta-menu%3Fcta%3Dcta-menu%3Fcta%3Dcta-menu%3Fcta%3Dcta-menu%3Fcta%3Dcta-menu%3Fcta%3Dcta-menu%3Fcta%3Dcta-menu%3Fcta%3Dcta-menu%3Fcta%3Dcta-menu%3Fcta%3Dcta-menu%3Fcta%3Dcta-menu%3Fcta%3Dcta-menu%3Fcta%3Dcta-menu%3Fcta%3Dcta-menu%3Fcta%3Dcta-menu%3Fcta%3Dcta-menu%3Fcta%3Dcta-menu%3Fcta%3Dcta-menu%3Fcta%3Dcta-menu%3Fcta%3Dcta-menu%3Fcta%3Dcta-menu%3Fcta%3Dcta-menu%3Fcta%3Dcta-menu%3Fcta%3Dcta-menu%3Fcta%3Dcta-menu%3Fcta%3Dcta-menu%3Fcta%3Dcta-menu%3Fcta%3Dcta-menu%3Fcta%3Dcta-menu%3Fcta%3Dcta-menu%3Fcta%3Dcta-menu%3Fcta%3Dcta-menu%3Fcta%3Dcta-menu%3Fcta%3Dcta-menu%3Fcta%3Dcta-menu%3Fcta%3Dcta-menu%3Fcta%3Dcta-menu%3Fcta%3Dcta-menu%3Fcta%3Dcta-menu%3Fcta%3Dcta-menu%3Fcta%3Dcta-menu%3Fcta%3Dcta-menu%3Fcta%3Dcta-menu%3Fcta%3Dcta-menu%3Fcta%3Dcta-menu%3Fcta%3Dcta-menu%3Fcta%3Dcta-menu%3Fcta%3Dcta-menu%3Fcta%3Dcta-menu%3Fcta%3Dcta-menu%3Fcta%3Dcta-menu%3Fcta%3Dcta-menu%3Fcta%3Dcta-menu%3Fcta%3Dcta-menu%3Fcta%3Dcta-menu%3Fcta%3Dcta-menu%3Fcta%3Dcta-menu%3Fcta%3Dcta-menu%3Fcta%3Dcta-menu%3Fcta%3Dcta-menu%3Fcta%3Dcta-menu%3Fcta%3Dcta-menu%3Fcta%3Dcta-menu%3Fcta%3Dcta-menu%3Fcta%3Dcta-menu%3Fcta%3Dcta-menu%3Fcta%3Dcta-menu%3Fcta%3Dcta-menu%3Fcta%3Dcta-menu%3Fcta%3Dcta-menu%3Fcta%3Dcta-menu%3Fcta%3Dcta-menu%3Fcta%3Dcta-menu%3Fcta%3Dcta-menu%3Fcta%3Dcta-menu%3Fcta%3Dcta-menu%3Fcta%3Dcta-menu%3Fcta%3Dcta-menu%3Fcta%3Dcta-menu

• there will be displayed an error several times in the log, causing a long stack-trace.

Environment

• DXP 7.3 SP1

Resolution

• The error thrown was not supposed to be an error, but a warning message instead. It was displayed like this back in Liferay Portal 6.2 and it was observed that it turned back to a single-line warning message in recent versions of 7.3 as well as the versions of DXP 7.4.
• A simple upgrade should resolve the behavior and you should expect to see a line like this:

 WARN  [http-nio-8080-exec-3][PortalImpl:7505] Unable to impersonate fPisUClvBcRej4ZdMR5+sw==sk because the string cannot be decrypted