I should also have added that you should upgrade to the latest jetty-9.4,
which is jetty-9.4.6.  From the look of some of those debug statements
you're on a slightly older version.

Jan

On 6 September 2017 at 10:55, Jan Bartel <[email protected]> wrote:

> John,
>
> As you can see on your log trace, each session contains a timer that
> expires when the session maxInactiveInterval is reached. When the timer
> expires, that session is queued for attention by the scavenger.  By default
> the scavenger thread only runs once every 10mins, so it is timing dependent
> exactly when the session will be scavenged wrt when the session expires.
> Note that an expired session that has not yet been scavenged is not able to
> be used, as you have discovered.  The servlet spec does not stipulate any
> relationship between when a session expires and when the sessionDestroyed
> listeners will be called, only that an expired session cannot be used, and
> that the listener must be called when the session is actually invalidated
> (expiry and invalidation being 2 different things).
>
> If you want to more aggressively get rid of sessions, you can either
> invalidate them yourself in code, or you can configure a smaller scavenge
> interval.  To do that, enable the "sessions" module (java -jar
> $jetty.home/start.jar --add-to-start=sessions) and configure the jetty.
> sessionScavengeInterval.seconds property. I don't think we've documented
> that adequately, so I've opened an issue to improve the doco on this
> aspect: https://github.com/eclipse/jetty.project/issues/1793
>
> cheers
> Jan
>
> On 6 September 2017 at 01:26, John English <[email protected]> wrote:
>
>> On 05/09/2017 18:18, John English wrote:
>>
>>> Later tests showed that a second request made between 5 and 10 minutes
>>> later also triggers sessionDestroyed(), and that a request is needed to
>>> trigger the call to sessionDestroyed() if the DEBUG flag is not turned
>>> on; with no DEBUG parameter and no subsequent request,
>>> sessionDestroyed() is never called.
>>>
>>
>> Correction: with a 5 minute timeout and no DEBUG flag, sessionDestroyed()
>> gets called automatically after TWENTY minutes!
>>
>> --
>> John English
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>
>
>
> --
> Jan Bartel <[email protected]>
> www.webtide.com
> *Expert assistance from the creators of Jetty and CometD*
>
>


-- 
Jan Bartel <[email protected]>
www.webtide.com
*Expert assistance from the creators of Jetty and CometD*
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