Opencast crashing on startup

[Johannes Hass]

So, currently, for completely unknown reasons OC is crashing hard at startup.

I recently did an update from source (though NOT a point upgrade!) and it ran fine afterwards. For a while. I just wondered why the videos were not working anymore.

Well, the admin panel just displayed an infinitely loading list. Restarting the service now only yields this:

2022-02-23T19:40:04,511 | ERROR | (EventDispatcher:881) - FrameworkEvent ERROR
java.lang.IllegalArgumentException: Filter [org.opencastproject.kernel.rest.CleanSessionsFilter@4a00baa5 is not currently registered in any context
        at org.ops4j.pax.web.service.spi.model.ServiceModel.removeFilter(ServiceModel.java:201) ~[?:?]
        at org.ops4j.pax.web.service.internal.HttpServiceStarted.unregisterFilter(HttpServiceStarted.java:679) ~[?:?]
        at org.ops4j.pax.web.service.internal.HttpServiceProxy.unregisterFilter(HttpServiceProxy.java:246) ~[?:?]
        at org.ops4j.pax.web.extender.whiteboard.internal.element.FilterWebElement.unregister(FilterWebElement.java:74) ~[?:?]
        at org.ops4j.pax.web.extender.whiteboard.internal.WebApplication.unregisterWebElement(WebApplication.java:417) ~[?:?]
        at java.util.ArrayList.forEach(ArrayList.java:1541) ~[?:?]
        at org.ops4j.pax.web.extender.whiteboard.internal.WebApplication.addWebElement(WebApplication.java:181) ~[?:?]
        at org.ops4j.pax.web.extender.whiteboard.internal.tracker.AbstractTracker.addingService(AbstractTracker.java:193) ~[?:?]
        at org.ops4j.pax.web.extender.whiteboard.internal.tracker.AbstractTracker.addingService(AbstractTracker.java:46) ~[?:?]

So. I'm seriously considering replacing Opencast with ffmpeg.

Any pointers on where you guys are hiding away the video files my users uploaded so they don't have to upload them again?

[Johannes Hass]

Damnit, not from source. From the apt repository.

[Greg Logan]

Hi Johannes,

The raw files should be in /var/lib/opencast/.

The error you're seeing would happen in the case of an unclean shutdown/startup but it doesn't tell us anything useful.  The log should have given you *some* other output too.  Let's try this:

- Stop Opencast.  Ensure no java processes remain with ps -aux.

- Clear the log file

- Run apt-get install -f to make sure apt is happy too

- Restart Opencast

If that doesn't fix it, then I'll need to see the full log file after the restart, and the output of dpkg -l | grep opencast.  From the symptoms I'm wondering if you've somehow got the apt packages partially installed.

G

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[Dietmar Zenker]

Hi,

which Opencast version do you use? I had a similar problem some time ago as described here. Maybe your problem is related to this, but after a few tries Opencast should start normally.

Greetings,

Dietmar