John -- WireShark (free download from http://www.wireshark.org/) is my
current favorite. It shows all the network traffic and can be filtered
based on IP, etc. I've blogged about it here with instructions on
using it:
http://devharbor.blogspot.com/2009/02/using-wireshark-to-sniff-http-packets.html


- Alex C

--- In flexcoders@yahoogroups.com, "oneworld95" <oneworl...@...> wrote:
>
> Thanks, Alex. It's not hanging on the Flex side -- the server response
> is never received. Using WireShark (http://www.wireshark.org/), I was
> able to see it's not hanging at all, but continually sending messages
> to the Java servlet but getting nothing back in reply. 
> 
> That's what led me to investigate the Java code more closely. The
> BufferedImage object was receiving some JPG images that it couldn't
> handle; so it spun away for a while before throwing an exception. For
> whatever reason, the exception never made it back to the Flex side. 
> 
> All is well now: I took out the BufferedImage object and am passing
> the InputStream directly to the Java Advanced Imaging API code, which
> resizes the image and writes it to disk. One issue: JPG images with
> CMYK color spaces come out with their colors mangled; but that's a
> limitation of the server code and has nothing to do with Flex.
> 
> - Alex
> 
> --- In flexcoders@yahoogroups.com, Alex Harui <aharui@> wrote:
> >
> > It would be unusual for Flex to hang waiting for the server.  Use a
> network monitor to see what's going on.  Is Flex really hung?  You
> can't hit a button or anything?
> > 
> > From: flexcoders@yahoogroups.com [mailto:flexcod...@yahoogroups.com]
> On Behalf Of oneworld95
> > Sent: Tuesday, February 03, 2009 7:25 AM
> > To: flexcoders@yahoogroups.com
> > Subject: [flexcoders] Detect exeptions - help!!
> > 
> > 
> > I've run into a very frustrating situation and need your help:
> > 
> > - Flex uploads a file to the server
> > - The server reads it into a Java BufferedImage object.
> > - However, Java sometimes takes 40 seconds or longer to reply
> > - In some cases it has difficulty reading the file.
> > 
> > In the cases of problems, Flex just hangs. It doesn't reply with
> > anything. Is it timing out? Any help appreciated.
> >
>


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