Dear Wiki user, You have subscribed to a wiki page or wiki category on "Tomcat Wiki" for change notification.
The "OutOfMemory" page has been changed by KonstantinKolinko: https://wiki.apache.org/tomcat/OutOfMemory?action=diff&rev1=12&rev2=13 Comment: Add section on HTTP sessions 1. Trace the GC roots of this object to find out what is holding on to a reference to that object that shouldn't be. That will be the source of the leak. ---- + + = HTTP sessions = + + (In response to [[https://issues.apache.org/bugzilla/show_bug.cgi?id=50685|[1]]], [[http://marc.info/?t=139136279300001&r=1&w=2|[2]]]) + + Please remember that a JSP page, even one that simply prints out “OK”, will create a session. This is by design and if you do not want it to create a session you need to explicitly indicate that in your JSP. For example: + + {{{ + <%@ page session="false" %> + }}} + + This is important in scenarios where you are doing load testing and using custom HTTP clients, because these clients may not be handling sessions correctly and thus end up creating a new session every time they access the page. + + One known category of misbehaving clients are web bots. To deal with them you can configure a [[http://tomcat.apache.org/tomcat-8.0-doc/config/valve.html#Crawler_Session_Manager_Valve|CrawlerSessionManagerValve]]. + + It is also possible to limit the number of active sessions by setting '''maxActiveSessions''' attribute on a [[http://tomcat.apache.org/tomcat-8.0-doc/config/manager.html|Manager]] element, e.g. + + {{{ + <Context> + <Manager maxActiveSessions="500" /> + </Context> + }}} + + + ---- [[CategoryFAQ]] --------------------------------------------------------------------- To unsubscribe, e-mail: dev-unsubscr...@tomcat.apache.org For additional commands, e-mail: dev-h...@tomcat.apache.org
