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Subject: RE: Problem with session counting
Date: Mon, 30 Aug 2004 09:26:44 -0400
Message-ID: <9C5166762F311146951505C6790A9CF80229BF9C@US-VS1.corp.mpi.com>
Thread-Topic: Problem with session counting
Thread-Index: AcSOlLF7H+Kzs5XvSWCY4PU3z1C4ogAADz1g
From: "Shapira, Yoav" <Yoav.Shapira@mpi.com>
To: "Tomcat Users List" <tomcat-user@jakarta.apache.org>


H=
i,
Does it make a difference if you make the counter int not static and t=
he two interface methods that increment/decrement the counter synchron=
ized?

Yoav Shapira
Millennium Research Informatics


>-----Original Message-----
>From: Michael S=FCdkamp [mailto:michael.suedkamp@docware.de]
>Sent: Monday, August 30, 2004 9:24 AM
>To: tomcat-user@jakarta.apache.org
>Subject: Problem with session counting
>
>Hi,
>
>I have problems tracking the lifecycle of my sessions. I use the sess=
ion
>listener code below.
>I test my app with Apache JMeter and run a test with 10 threads for a=
bout 3
>minutes.
>Then I stop the test and let the sessions time out (session timeout i=
s set
>to 5 min)
>
>Almost everytime the session counter is greater than 0 when I expect =
it to
>be 0.
>My logs show that my session count during the test goes beyond the ex=
pected
>10 sessions (it rises to 13-16 sessions depending on the test duratio=
n).
>
>The Tomcat manager reports 10 sessions during the test and 0 sessions=
 after
>all sessions have timesd out.
>
>Is there anything wrong I can do with my sessions so that the created=
 and
>destroyed sessions are not balanced?
>
>Thanks
>
>Michael
>
>
>public class SimpleSessionListener implements HttpSessionListener {
>
>  private static int sessionCount =3D 0;
>
>  public void sessionCreated(HttpSessionEvent event) {
>    sessionCount++;
>    System.out.println("sessionCreated: sessionCount=3D"+sessionCount=
);
>  }
>
>  public void sessionDestroyed(HttpSessionEvent event) {
>    sessionCount--;
>    System.out.println("sessionDestroyed: sessionCount=3D"+sessionCou=
nt);
>  }
>
>}
>
>
>
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