Mailing-List: contact users-help@tomcat.apache.org; run by ezmlm
Precedence: bulk
Reply-To: "Tomcat Users List" <users@tomcat.apache.org>
Received-SPF: pass (nike.apache.org: local policy)
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
From: Brett Delle Grazie <brett.dellegrazie@intact-is.com>
To: users@tomcat.apache.org
In-Reply-To: <4C8E6244.3020201@apache.org>
References: <4C8E6244.3020201@apache.org>
Content-Type: text/plain; charset="UTF-8"
Content-Transfer-Encoding: quoted-printable
Organization: Intact Integrated Services
Date: Mon, 13 Sep 2010 23:28:24 +0100
Message-ID: <1284416904.2273.5.camel@bdellegrazie-t500>
Mime-Version: 1.0

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 se=
nt
> > to the client we are receiving a 'flush' message _after_ the
> > END_RESPONSE message. On the next request, mod_jk sees this a breach i=
n
> > the protocol, closes the socket and results in poor performance and
> > missed requests.
> >
> >
>=20
> The workaround would be to drop any flush messages
> after the END_RESPONSE check.
>=20
> 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.
>=20
> 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.
>=20
> 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,

>=20
>=20
> Regards

--=20
Best Regards,

Brett Delle Grazie

______________________________________________________________________
This email has been scanned by the MessageLabs Email Security System.
For more information please visit http://www.messagelabs.com/email=20
______________________________________________________________________

---------------------------------------------------------------------
To unsubscribe, e-mail: users-unsubscribe@tomcat.apache.org
For additional commands, e-mail: users-help@tomcat.apache.org