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From Brett Delle Grazie <brett.dellegra...@intact-is.com>
Subject Re: Tomcat AJP APR connector to mod_jk can result in SEND_BODY_CHUNK message after END_RESPONSE message, was Re: unusual mod_jk 1.2.30 log messages
Date Mon, 13 Sep 2010 22:28:24 GMT
On Mon, 2010-09-13 at 19:41 +0200, Mladen Turk wrote:
> On 09/13/2010 07:15 PM, Brett Delle Grazie wrote:
> >
> > Our problem is that in a servlet that retrieves a file that is then sent
> > to the client we are receiving a 'flush' message _after_ the
> > END_RESPONSE message. On the next request, mod_jk sees this a breach in
> > the protocol, closes the socket and results in poor performance and
> > missed requests.
> >
> >
> 
> The workaround would be to drop any flush messages
> after the END_RESPONSE check.
> 
> However, this is obvious error of the server side.
> END_RESPOSE in AJP protocol reflects the Socket.close()
> so any flush (or read or write) on that socket would
> throw an exception if the non-AJP protocol was used
> inside that servlet/stream.
> 
> Detaching AJP streams from the servlet and using them
> as a OutputStream is not very well handled in Tomcat.
> I suppose if using APR the entire thing would even crash the JVM.
> 
> Trying to deal with that on mod_jk side would have my strong -1.

And I would agree with that whole heartedly.

So I guess the APR AJP connector implementation needs to be reviewed...
I am looking but as I'm not familiar with the code any help or pointers
would be appreciated.

Should I raise a bugzilla bug?

Thanks,

> 
> 
> Regards

-- 
Best Regards,

Brett Delle Grazie

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