Re: [Resin-interest] Why is session unbound called after cluster failover?

2007-11-05 Thread Kai Virkki
Hi Scott!

It seems that different servlet containers have different ways on
whether to invoke the session listeners when session is transferred to
a different node than where it was last accessed. I agree with you
that the Servlet spec is not very clear on this. It also seems that
different developers have different opinions about what is the correct
way. Of course the way that solves their issues at hand seems the
correct one :-) Could it be possible to add a configuration, like
Tomcat's notifySessionListenersOnReplication to let the developers
decide are the SessionListeners called or not? This would make it
possible to interpret the servlet spec whatever way needed :)

In my opinion, the HttpSessionListener's sessionDestroyed method
should only be called when the session (cluster-wide) ends. Otherwise,
it is really hard to code any logic to release resources that are held
during the user session. I'm not so sure about the
HttpSessionBindingListener's valueUnbound, but maybe it should work
the same way as the other session listener does.

regards,

Kai

2007/11/2, Scott Ferguson [EMAIL PROTECTED]:

 On Oct 31, 2007, at 6:44 AM, Kai Virkki wrote:

  And to add to this, I noticed that in my cluster setup, both
  valueUnbound and sessionDestroyed get called when i shutdown the Resin
  node that the session is currently on. I don't think this is
  appropriate since the user's session will continue fine on the other
  Resin node. I have a problem here, because I need to release some
  resources when user session REALLY ends, not when one of the nodes
  dies.

 I've added this as a bug report, but the main problem is that there
 are really two cases that matter.

 First, when the value/session is removed in memory (e.g. to handle
 JVM-specific stuff like Sockets).

 Second, when the session is totally removed.

 The servlet api doesn't really handle persistent sessions well.  It's
 mostly centered around a single JVM.  So valueUnbound means the
 attribute is removed from the session instance (case #1).
 SessionDestroyed is even more complicated.

 -- Scott

 
  Is there any work-around for this weird Resin behavior?? How can I
  listen to the session FINALLY ending in a cluster??
 
  regards,
 
  Kai
 
  2007/10/31, Kai Virkki [EMAIL PROTECTED]:
  Hi!
 
  I noticed that the issue with unBound being called is fixed from
  3.1.2 - 3.1.3.
 
  0001820: valueBound isn't called on load from persistent store
  anymore
  but valueUnbound still is called on save
 
  We have the same problem on 3.0.23. Could it be fixed to the
  production branch too?
 
  best regards,
 
  Kai
 
 
 
  ___
  resin-interest mailing list
  resin-interest@caucho.com
  http://maillist.caucho.com/mailman/listinfo/resin-interest



 ___
 resin-interest mailing list
 resin-interest@caucho.com
 http://maillist.caucho.com/mailman/listinfo/resin-interest



___
resin-interest mailing list
resin-interest@caucho.com
http://maillist.caucho.com/mailman/listinfo/resin-interest


Re: [Resin-interest] Why is session unbound called after cluster failover?

2007-10-31 Thread Kai Virkki
And to add to this, I noticed that in my cluster setup, both
valueUnbound and sessionDestroyed get called when i shutdown the Resin
node that the session is currently on. I don't think this is
appropriate since the user's session will continue fine on the other
Resin node. I have a problem here, because I need to release some
resources when user session REALLY ends, not when one of the nodes
dies.

Is there any work-around for this weird Resin behavior?? How can I
listen to the session FINALLY ending in a cluster??

regards,

Kai

2007/10/31, Kai Virkki [EMAIL PROTECTED]:
 Hi!

 I noticed that the issue with unBound being called is fixed from 3.1.2 - 
 3.1.3.

 0001820: valueBound isn't called on load from persistent store anymore
 but valueUnbound still is called on save

 We have the same problem on 3.0.23. Could it be fixed to the
 production branch too?

 best regards,

 Kai



___
resin-interest mailing list
resin-interest@caucho.com
http://maillist.caucho.com/mailman/listinfo/resin-interest