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From <ogjunk-comm...@yahoo.com>
Subject Re: NPE: map.LRUMap.reuseMapping(LRUMap.java:272)
Date Tue, 07 Dec 2004 18:40:41 GMT
Hello Stephen,

Thanks for such a quick reply.  I added the problem to Buzgilla:

  http://issues.apache.org/bugzilla/show_bug.cgi?id=32573

Thanks,
Otis


--- Stephen Colebourne <scolebourne@btopenworld.com> wrote:

> This looks like a bug. Could you please add it to
> bugzilla. It would help greatly, and speed a fix, if
> you can identify a small test case that causes the
> problem.
> Thanks
> Stephen
> 
> 
>  --- ogjunk-commons@yahoo.com wrote: 
> > Hello,
> > 
> > I'm using Collections 3.1 and just found this NPE in
> > my logs:
> > 
> > java.lang.NullPointerException
> >         at
> >
>
org.apache.commons.collections.map.LRUMap.reuseMapping(LRUMap.java:272)
> >         at
> >
> org.apache.commons.collections.map.LRUMap.addMapping(LRUMap.java:243)
> >         at
> >
>
org.apache.commons.collections.map.AbstractHashedMap.put(AbstractHashedMap.java:282)
> > 
> > 
> > This looks like a bug.  Is this a known issue?
> > I instantiated LRUMap like this:
> > 
> >   LRUMap map = new LRUMap(31);
> > 
> > And from there on, I use it like I'd use any Map,
> > putting things into
> > it, and so on.  Maybe I'm not using LRUMap
> > correctly?  My _guess_ is
> > that this occurs when the Map is full, but I am not
> > certain.
> > 
> > I am wrapping the LRUMap in my own Maps as follows,
> > but I think they're
> > not the culprit:
> > 
> >   LRUMap map = new LRUMap(31);
> >     _userSessions = new ExpiringMap(map,
> >        new TimerTTLReferenceHolder(1800000), //
> > ttl=30min
> >        300000);                              //
> > purge frequency=5min
> > 
> > 
> > I checked Bugzilla and I checked the CVS log for
> > LRUMap, but I don't
> > see any mentions of relevant bug fixes.  The only
> > similar thing I found
> > is:
> >
> http://issues.apache.org/bugzilla/show_bug.cgi?id=28887
> > 
> > And it looks like that was fixed before 3.1 release.
> > 
> > I'm seeing this error in production (
> > http://www.simpy.com ), so any
> > help would be mucho appreciated.
> > 
> > Thanks,
> > Otis
> > P.S.
> > If it helps, I can put this in Bugzilla.
> > 
> > 
> >
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