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From Steve Short <Steve.Sh...@PostX.com>
Subject RE: Found Problem with Retries and Bounces
Date Tue, 05 Mar 2002 19:58:23 GMT
Serge,

I something like that in LinearProcessor, it saves to a new file each time
the message status has been changed, but I don't see this in RemoteDelivery.
For now I have simply added a call to saveChanges() immediately prior to the
call to store().  While this is simple and it works, it is less than ideal
because it opens a small window when the data does not exist on disk and
would therefore be lost during a system failure.

Regards
Steve

-----Original Message-----
From: Serge Knystautas [mailto:sergek@lokitech.com]
Sent: Tuesday, March 05, 2002 11:54 AM
To: James Developers List
Subject: Re: Found Problem with Retries and Bounces


Thanks for the analysis.  I think what I did was changing RemoteDelivery to
save to a new file... I can also change the MimeMessageWrapper to check
where the file is saved and accordingly move the old file to a temp location
or something like that.

Serge Knystautas
Loki Technologies - Unstoppable Websites
http://www.lokitech.com/
----- Original Message -----
From: "Steve Short" <Steve.Short@PostX.com>
To: "James Dev (E-mail)" <james-dev@jakarta.apache.org>
Sent: Tuesday, March 05, 2002 2:14 PM
Subject: Found Problem with Retries and Bounces


> OK I have found the basic cause of the message header information being
lost
> during retries of temporary failures.  Basically the MimeMessageWrapper
> doesn't fully load the data file until it is actually needed, it stores a
> reference to a MimeMessageSource instead.  When RemoteDelivery updates the
> message status and retry count, it attempts to store() the updated
message.
>
> What happens is that store() creates a new FileOutputStream, which
truncates
> the file to 0 bytes, then tells the message object to write itself to the
> new file.  MimeMessageWrapper realises that it needs to read the header
data
> from it's MimeMessageSource and tries to do so, but this file has just
been
> wiped.  Therefore the data has been lost.
>
> Regards
> Steve


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