I edited the session timeout value to 30 minutes in the web.xml inside the Liferay WAR file that used to install in webpshere. Also, I verified the session.timeout property inside the Control Panel -> Server Administration -> Properties -> Portal Properties. However, the session ends at 15 min which was the default value before we edit the timeout. We did a similar edit in tomcat instance and that worked. Please help me  customize the Liferay session timeout value on IBM websphere.