Re: db4o11-7.4 AbstractMethodError

On Tue, 14 Aug 2012 11:40:49 -0400, Steve Dougherty wrote:
> On 08/14/2012 08:56 AM, Dennis Nezic wrote:
> > On Fri, 10 Aug 2012 15:47:35 -0400, Steve Dougherty wrote:
> >> Any idea what may have changed before this problem started
> >> happening? What version of ant are you using to build?
> > 
> > That's what I'm pulling my hair trying to find out! I only upgraded
> > a few system packages on my machine, like glib, libffi, ... -- and 
> > nothing much else! But how can a seemingly unrelated system
> > package have such a huge effect in a Java environment??
> > 
> > I haven't changed my jdk (although recently I did test with
> > others, sun-jdk and icedtea-bin), I haven't changed my ant, I
> > haven't changed my db4o's, I recompiled all of Freenet's (direct)
> > dependencies. This is incredibly frustrating. I mean, 1407 WAS
> > working before, and now it's not :S.
> > 
> > Here are the types of AbstractMethodError's that arise:
> > 
> > 
> > java.lang.AbstractMethodError: 
> > com.db4o.internal.query.ObjectSetFacade.iterator
> > ()Ljava/util/Iterator;
> >
> > 
> at freenet.client.async.ClientRequestScheduler.loadKeyListeners
> > (ClientRequestScheduler.java:114) [code] ObjectSet<HasKeyListener>
> > results = Db4oBugs.query (container, HasKeyListener.class); for
> > (HasKeyListener l : results) {   <--- ** 114 [/code]
> > 
> > 
> > java.lang.AbstractMethodError: 
> > com.db4o.internal.query.ObjectSetFacade.iterator
> > ()Ljava/util/Iterator;
> >
> > 
> at freenet.client.async.PersistentStatsPutter.restorePreviousData
> > (PersistentStatsPutter.java:44) [code] 
> > ObjectSet<BandwidthStatsContainer> BSCresult = container.query
> > (BandwidthStatsContainer.class); for (BandwidthStatsContainer
> > candidate : BSCresult) {   <--- ** 44 [/code]
> 
> So what did you do to establish that your database is not corrupted?
> These are internal db4o errors.

Hmm. So it does seem as though my datastore was corrupted. Deleting it,
and making my node create a new one got me up and running again. Thanks
Steve!

The odd thing is a bunch of us[1] have been getting this error /
corruption since about the time build1409 came out. I sure hope it's
just a freak coincidence :S.

[1] https://bugs.gentoo.org/show_bug.cgi?id=429716
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