# Spring boot adapter can't logout under Jetty

**URL:** <https://forum.keycloak.org/t/spring-boot-adapter-cant-logout-under-jetty/1623>\
**Category:** Securing applications\
**Created:** [March 10, 2020, 9:21am UTC](https://forum.keycloak.org/t/spring-boot-adapter-cant-logout-under-jetty/1623 "2020-03-10T09:21:24Z")\
**Posts on this page:** 1\
**Page:** 1

<div class="post-metadata">

**Author:** ![vadimkim](https://avatars.discourse-cdn.com/v4/letter/v/ecccb3/32.png) [@vadimkim](https://forum.keycloak.org/u/vadimkim)\
**Post date:** [March 10, 2020, 9:21am UTC](https://forum.keycloak.org/t/spring-boot-adapter-cant-logout-under-jetty/1623/1 "2020-03-10T09:21:24Z")

</div>

Using Spring boot keycloak adapter with Jetty servlet container generates exception on /k\_logout:

```
2020-03-10 10:37:24,864 [app] WARN org.eclipse.jetty.server.HttpChannel - /k_logout
java.lang.IllegalAccessError: class org.keycloak.adapters.jetty.Jetty94SessionManager tried to access protected method 'javax.servlet.http.HttpSession org.eclipse.jetty.server.session.SessionHandler.getHttpSession(java.lang.String)' (org.keycloak.adapters.jetty.Jetty94SessionManager and org.eclipse.jetty.server.session.SessionHandler are in unnamed module of loader org.springframework.boot.loader.LaunchedURLClassLoader @45ff54e6)
at org.keycloak.adapters.jetty.Jetty94SessionManager.getHttpSession(Jetty94SessionManager.java:38)

```

Under Tomcat and Undertow it works correctly.