SSO login failure after a Tomcat upgrade
If you have configured Single Sign-On (SSO) with one version of Common Tomcat and have upgraded Deployment Automation to a version that uses a different version, you must configure Common Tomcat for SSO again, including setting the parameters in the gatekeeper-core-config.xml file. Otherwise, the SSO login will fail.
You must set these parameters by copying over the corresponding strings from earlier version of the gatekeeper-core-config.xml file. Copying and replacing the entire file from the earlier Common Tomcat installation does not work.
For instructions on setting up SSO, see Configuring Common Tomcat for SSO.