'java.lang.ClassCastException: org.jboss.resteasy.core.registry.ConstantResourceInvoker cannot be cast to org.jboss.resteasy.core.ResourceMethodInvoker` after update to RH-SSO 7.6.3

Solution Verified - Updated -

Issue

  • After upgrading RH-SSO, the following error is returned in the logs:
ERROR [org.keycloak.services.error.KeycloakErrorHandler] (default task-16) Uncaught server error: java.lang.ClassCastException: class org.jboss.resteasy.core.registry.ConstantResourceInvoker cannot be cast to class org.jboss.resteasy.core.ResourceMethodInvoker (org.jboss.resteasy.core.registry.ConstantResourceInvoker and org.jboss.resteasy.core.ResourceMethodInvoker are in unnamed module of loader 'org.jboss.resteasy.resteasy-jaxrs@3.15.7.Final-redhat-00001' @2fb0113e)
    at org.jboss.resteasy.resteasy-jaxrs@3.15.7.Final-redhat-00001//org.jboss.resteasy.core.ResourceLocatorInvoker.invokeOnTargetObject(ResourceLocatorInvoker.java:149)
    at org.jboss.resteasy.resteasy-jaxrs@3.15.7.Final-redhat-00001//org.jboss.resteasy.core.ResourceLocatorInvoker.invoke(ResourceLocatorInvoker.java:110)
    at org.jboss.resteasy.resteasy-jaxrs@3.15.7.Final-redhat-00001//org.jboss.resteasy.core.ResourceLocatorInvoker.invokeOnTargetObject(ResourceLocatorInvoker.java:141)
...

Environment

  • Red Hat Single Sign-On (RH-SSO)
    • 7.6.3
    • 7.6.4
    • 7.6.5

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