Define inside web.xml
Open $CATALINA_BASE/conf/web.xml
and find this:
<!-- ==================== Default Session Configuration ================= -->
<!-- You can set the default session timeout (in minutes) for all newly -->
<!-- created sessions by modifying the value below. -->
<session-config>
<session-timeout>30</session-timeout>
</session-config>
All webapps implicitly inherit from this default web descriptor. You can override these default settings via your webapp's own web.xml
file.
This is actually from my Tomcat 7 (Windows) but I think Tomcat 5.5's configuration is not very different
与恶龙缠斗过久,自身亦成为恶龙;凝视深渊过久,深渊将回以凝视…