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From Markus Jelsma <markus.jel...@openindex.io>
Subject RE: ClassCastException: o.a.l.d.Field cannot be cast to o.a.l.d.StoredField
Date Thu, 26 Apr 2018 14:42:33 GMT
Hello David,

Yes it was sporadic indeed, but how would a DocumentTransformer affect UpdateLog replay?

We removed the cast, no idea how it got there.

Thanks,
Markus
 
-----Original message-----
> From:David Smiley <david.w.smiley@gmail.com>
> Sent: Thursday 26th April 2018 16:31
> To: solr-user@lucene.apache.org
> Subject: Re: ClassCastException: o.a.l.d.Field cannot be cast to o.a.l.d.StoredField
> 
> I'm not sure but I wonder why you would want to cast it in the first
> place.  Field is the base class; all it's subclasses are in one way or
> another utilities/conveniences.  In other words, if you ever see code
> casting Field to some subclass, there's a good chance it's fundamentally
> wrong or making assumptions that aren't necessarily true.
> 
> If the problem you saw appears sporadic, there's a good chance it is in
> some way related to updateLog replay.
> 
> On Tue, Apr 24, 2018 at 7:13 AM Markus Jelsma <markus.jelsma@openindex.io>
> wrote:
> 
> > Hello,
> >
> > We have a DocumentTransformer that gets a Field from the SolrDocument and
> > casts it to StoredField (although aparently we don't need to cast). This
> > works well in tests and fine in production, except for some curious,
> > unknown and unreproducible, cases, throwing the ClassCastException.
> >
> > I can, and will, just remove the cast to fix the rare exception, but in
> > what cases could the exception get thrown?
> >
> > Many thanks,
> > Markus
> >
> -- 
> Lucene/Solr Search Committer, Consultant, Developer, Author, Speaker
> LinkedIn: http://linkedin.com/in/davidwsmiley | Book:
> http://www.solrenterprisesearchserver.com
> 

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