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https://issues.apache.org/jira/browse/FELIX-642?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12619466#action_12619466
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Bruce Jackson commented on FELIX-642:
-------------------------------------
It sounds like there's some kind of timeout happening in the base driver which
is causing un-subscription to occur. Have you tried spawning a thread in A that
generates regular "alive" events that don't do anything but just keep the
system up?
I've just looked at page 62 of the UPnP spec, and its clear that subscriptions
have a duration field, and in the base driver code (in
org.apache.felix.upnp.basedriver.importer.core.event.thread.SubScriber.java)
this is hard coded to 12000. Thus, the subscription will indeed timeout after
12000 milliseconds, and will need to be refreshed. It doesn't look like this
value can be changed: perhaps this should be raised as a bug?
> upnp event delivery to OSGi event listeners fails on random devices after a
> certain period of time
> --------------------------------------------------------------------------------------------------
>
> Key: FELIX-642
> URL: https://issues.apache.org/jira/browse/FELIX-642
> Project: Felix
> Issue Type: Bug
> Components: UPnP Subproject
> Affects Versions: upnp-basedriver-0.8.0
> Reporter: Daniel Felsing
> Priority: Blocker
> Fix For: upnp-basedriver-0.8.0
>
>
> Ok...overall problem is as follows:
> upnp event delivery to OSGi event listeners fails on random devices after a
> certain period of time
> Overall Environment Setup
> -------------------------
> - i have two hosts A and B => A is a Bridge exporting about 20 devices at the
> moment (will get more - it's a X10 like system), B acts as a central server
> for the devices (Smart Home implementation)
> - A is a SensorBridge...and B a central controlpoint importing all those
> devices
> - both ends use upnpbasedriver 0.8 and extra bundle from felix project
> - the two hosts are connected through a Gigabit Switch (NO WIRELESS USED!)
> - all the devices on the server (so the central smart home controller) that
> get imported get refined. They subscribe to the upnp device it refines to get
> notified on event change.
> - on the central server (Host B) i subscribe to UPnP Devices exported by Host
> A using UPnPSubscriber Helper class of the extra bundle
> Issues
> ------
> - "SOMETIMES" on INITIAL subscription not all devices get notified about the
> initial status (devices get found properly though)
> ( see also http://www.mail-archive.com/[EMAIL PROTECTED]/msg01781.html for
> that)
> - after some time of operation random devices begin to fail - that
> means..they do not get notified about event changes anymore, but devices are
> still present (so they are still there as UPnPDevice instances in the central
> server)...
> => i had debug enabled....and as i see i still receive the event-change
> notifies on my Host B (=central server)....if i "resubscribe" to the event
> listener of the failed device everything works again (i dont need to restart
> the whole basedriver or osgi framework to let it work again - just my
> refining driver must be restarted which does the subscription to the devices
> using UPnPSubscriber class) ...
> SO this STILL GETS DELIVERED, but listeners do not get notified about the
> change:
> ================REQUEST=====================
> NOTIFY /evetSub HTTP/1.0
> Content-Type: text/xml; charset="utf-8"
> HOST: 192.168.0.5
> NT: upnp:event
> NTS: upnp:propchange
> SID: uuid:956d-a11b-fe88-e08e
> SEQ: 0
> Content-Length: 165
> Connection: close
> <?xml version="1.0" encoding="utf-8"?>
> <propertyset xmlns:e="urn:schemas-upnp-org:event-1-0">
> <property>
> <Status>off</Status>
> </property>
> </propertyset>
> --------------------------------------------
> Tests:
> -----------------
> - yes - every device exported by the upnpsensorbridge (=Host A) gets found by
> the central server (=Host B)
> - upnp tester of felix project experiences same issues
> - the REFINED devices on the SERVER themselves are using the felix helper
> class to subscribe to the events:
> // create upnp listener - if evented is true
> subscriber = new UPnPSubscriber(bundleContext, this);
> subscriber.subscribeAllServicesOf(super.getUPnPDeviceUDN());
> - i also tried: EventListener test = new EventListener();
> servReg =
> context.registerService(UPnPEventListener.class.getName(), test, null);
> (so not using UPnPSubscriber) => same problem...so UPnPSubscriber may not be
> the root of the problem
> - the upnp device implementation on the host exporting the upnp devices (
> =Host A, sensorbridge) are using the following line to expose event notifier
> // setup event notifier
> notify_switch = new UPnPEventNotifier(context, this,
> switchdevswitchservice, switchDev);
> ================================================================================
> Is it possible that my issue is connected to this one mentioned in the
> cyberlink forum?
> Stefano answered to it in the cyberlink forum!!
> http://sourceforge.net/forum/forum.php?thread_id=1952657&forum_id=258158
> ----------------------------------------------------------------------------------------------------------------------------
> if you need something else please contact me! :)
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