0ed2c426_3____The_ClusterManager_object__Attribute
[Description] When a web application is being shutdown, Tomcat issues an expire call to each session to notify all the listeners. If you wish for all sessions to expire on all nodes when a shutdown occurs on one node, set this value to true. Default value is false. [Attribute] 
expireSessionsOnShutdown
Apache Tomcat 7 Configuration Reference (7.0.63) - The ClusterManager object