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Support Article

Application SSO URL not working after Tomcat 7.0.88 upgrade



Unable to login with single sign-on (SSO) post upgrading to Tomcat 7.0.88 server. The error URL displays [[.

Error Messages

Error: 400 HTTP

Steps to Reproduce

Navigate to the application URL with SSO on Tomcat 7.0.88 server.

Root Cause

The access group hash which is generated has the '[[' special character in the URL which is not allowed in the Tomcat 7.0.88 server.


Apply the below hotfixes based on the Pega versions.
  • Pega 7.2 - HFix-46989 
  • Pega 7.2.1 - HFix-46991
  • Pega 7.2.2 - HFix-46992
  • Pega 7.3 - HFix-46993
  • Pega 7.3.1 - HFix-46773
  • Pega 7.4 - HFix-47094
Suggest Edit

Published September 20, 2018 - Updated December 2, 2021

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