> -----Original Message-----
> From: Benjamin Francisoud [mailto:[EMAIL PROTECTED] 
> Sent: Friday, February 29, 2008 7:05 AM
> To: [email protected]
> Subject: Re: Proposal for error handling in Pig
> 
> About Internal Errors, do you consider such code to be part of them ?
> 
> public void something(Object object) {
>     if (o == null) {
>         throw new IllegalArgumentException("Object can't be null");
>     }
>     ...
> }
> 
> class StateMachine {
>     public void start() {...}
>     public void end() {
>         if (startCalled == false) {
>             throw new IllegalStateException("You didn't call 
> start()");
>         }
>     }
> }
> 
> About user errors, how should we handle them ?
> The way I proposed in PIG-100 (1) ?

Yes, that's fine. I personally don't see a strong reason to log the exception 
stack in this case but I am fine with doing it if others find it helpful. I 
will update the doc to include this information.

> 
> try {
>     plan = parser.Parse();
> } catch (ParseException e) {
>     log.error(e.getMessage());
>     log.debug(e);
> }
> 
> 
> 
> [1]
> https://issues.apache.org/jira/browse/PIG-100?focusedCommentId
> =12573218#action_12573218
> 
> Olga Natkovich a écrit :
> > Pig developers,
> >  
> > We had many patches submitted that are trying to improve 
> error handling.
> > This is really great as many users ask exactly for that. So 
> it seems 
> > timely to establish some guidelines on how errors should be 
> handled, 
> > propagated, delivered, etc.
> >  
> > I put together a proposal to start the discussion. Please, 
> review and 
> > comment. Once we have an agreement we would need to add the missing 
> > pieces to deploy it into Pig and then review the existing 
> patches to 
> > make sure they follow the proposed practice.
> >  
> > http://wiki.apache.org/pig/PigDeveloperCookbook
> >  
> > I have also started a general document called Pig Developer 
> Cookbook 
> > where we can keep track of development patterns we as a 
> community want 
> > to follow.
> >  
> > Thanks again for everybody's contributions!
> >  
> > Olga
> >
> >   
> 
> 

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