Keycloak integration with DolphinScheduler redirects to login page after authentication.

[Geethika-sg]

I am trying to integrate Keycloak with DolphinScheduler for Single Sign-On (SSO). The Keycloak login page appears as expected, and the session in Keycloak is successfully created after entering the login credentials. However, after authentication, DolphinScheduler redirects me back to its login page instead of logging me in.

After providing credentials in Keycloak, DolphinScheduler redirects back to its login page without logging in the user.

Environment :
============

• DolphinScheduler version : 3.2.2
• Keycloak version: 22
• OS: Oracle Linux Server 9.4

settings in application.yaml for api-server :

keycloak:
          authorizationUri: "https://xyz.com/realms/sso/protocol/openid-connect/auth"
          redirectUri: "https://dolphin.xyz.com/dolphinscheduler/ui/login"
          clientId: "dolphin"
          clientSecret: "abcxyz"
          tokenUri: "https://xyz.com/realms/sso/protocol/openid-connect/token"
          userInfoUri: "https://xyz.com/realms/sso/protocol/openid-connect/userinfo"
          callbackUrl: "https://dolphin.xyz.com/dolphinscheduler/ui/login/callback"
          #iconUri: "" # This can be an optional field, or the logo of Keycloak or Dolphinscheduler
          scope: openid, profile, email
          authorization-grant-type: authorization_code
          provider: keycloak

Logs :

[WARN] 2024-10-14 07:37:12.290 +0000 o.e.j.s.HttpChannel:[776] - /dolphinscheduler/ui/login
java.lang.NullPointerException: null
        at org.springframework.web.servlet.i18n.CookieLocaleResolver.parseLocaleCookieIfNecessary(CookieLocaleResolver.java:226)
        at org.springframework.web.servlet.i18n.CookieLocaleResolver.resolveLocaleContext(CookieLocaleResolver.java:198)
        at org.springframework.web.servlet.DispatcherServlet.buildLocaleContext(DispatcherServlet.java:1181)
        at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:995)
        at org.springframework.web.servlet.FrameworkServlet.doGet(FrameworkServlet.java:898)
        at `javax.servlet.http.HttpServlet.service(HttpServlet.java:497)`