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From Ugo Cei <>
Subject Re: NPEs in FlowLayer
Date Wed, 29 Oct 2003 12:10:09 GMT
Jeremy Quinn wrote:
> Hi All
> I am getting mysterious NPEs in the flowlayer, while working with the  
> flow version of  'authentication-fw'.
> Not only are they odd, they are completely inconsistent.
> They tend to happen after a script redirects after eg. a bad login.

I've just committed a workaround for a case where I was getting NPEs. 
Looks like, in some cases, an already invalidated instance of FOM_Cocoon 
is being reused, but of course all its fields have already been set to null.

My patch is just a workaround, since this situation should never happen, 
but I haven't been able to determine the real cause. Besides, adding a 
couple extra null checks isn't going to hurt anyway, and should the 
situation arise, you'll get a message on System.err (not via the Logger, 
since it's already been nulled as well).

You might also check Vadim's commit of yesterday to see if it's relevant.


Ugo Cei - Consorzio di Bioingegneria e Informatica Medica
P.le Volontari del Sangue, 2 - 27100 Pavia - Italy
Phone: +39.0382.525100 - E-mail:

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