Cannot create a session after the response has been committed

[vahid ghasemi]

Hello
I have a problem with my server, tomcat get down after getting many of this
error:

java.lang.IllegalStateException: Cannot create a session after the response
has been committed
        at
org.apache.catalina.connector.Request.doGetSession(Request.java:2992)
        at
org.apache.catalina.connector.Request.getSession(Request.java:2432)
        at
org.apache.catalina.connector.RequestFacade.getSession(RequestFacade.java:908)
        at
org.apache.wicket.session.HttpSessionStore.getHttpSession(HttpSessionStore.java:95)
        at
org.apache.wicket.session.HttpSessionStore.getSessionId(HttpSessionStore.java:166)
        at org.apache.wicket.Session.bind(Session.java:267)
        at org.apache.wicket.Page.onBeforeRender(Page.java:808)
        at
org.apache.wicket.Component.internalBeforeRender(Component.java:963)
        at org.apache.wicket.Component.beforeRender(Component.java:1031)
        at
org.apache.wicket.Component.internalPrepareForRender(Component.java:2248)
        at org.apache.wicket.Page.internalPrepareForRender(Page.java:242)
        at org.apache.wicket.Component.render(Component.java:2337)
        at org.apache.wicket.Page.renderPage(Page.java:1018)


I haven't any idea about this error, do you know what is the problem?