Changing OpenKM timeout session
From OpenKM Documentation
To change OpenKM timeout session you must add in web.xml file it (the number indicates the timeout in minutes). The web.xml file is located into OpenKM.war file (into WEB-INF folder). The OpenKM.war file is located in $JBOSS_HOME/server/default/deploy folder.
<session-config>
<session-timeout>30</session-timeout>
</session-config>