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From "C. Benson Manica" <cbman...@gmail.com>
Subject Re: Transfer-Encoding: chunked not working
Date Fri, 06 Dec 2013 17:33:51 GMT
I'm sure it *is* some kind of buffer boundary - 16384 is not a random
number ;-) As it happens, I *did* miss some logging (my IDE made it easy to
miss). I have no idea what this exception means though:

SEVERE: Servlet.service() for servlet [jsp] in context with path [] threw
exception [java.lang.ArrayIndexOutOfBoundsException: 0] with root cause
java.lang.ArrayIndexOutOfBoundsException: 0
at org.apache.jsp.index_jsp._jspService(org.apache.jsp.index_jsp:785)
at org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:109)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:728)

(rest of stack trace omitted)

Presumably this is my actual problem, whatever it is?


On Thu, Dec 5, 2013 at 10:57 PM, Felix Schumacher <
felix.schumacher@internetallee.de> wrote:

>
>
>
>
> "C. Benson Manica" <cbmanica@gmail.com> schrieb:
> >On Thu, Dec 5, 2013 at 10:58 AM, Christopher Schultz <
> >chris@christopherschultz.net> wrote:
> >
> >> -----BEGIN PGP SIGNED MESSAGE-----
> >> Hash: SHA256
> >>
> >> C.,
> >>
> >> On 12/5/13, 12:53 PM, C. Benson Manica wrote:
> >> > The content I expect is in the neighborhood of 30K. What I get back
> >> > is
> >> >
> >> > $ curl -i http://localhost:8080/
> >> >
> >> > HTTP/1.1 200 OK^M Server: Apache-Coyote/1.1^M Set-Cookie:
> >> > JSESSIONID=6ED488F581B8D3317261ADA2AD97CC20; Path=/; HttpOnly^M
> >> > Content-Type: text/html;charset=UTF-8^M Transfer-Encoding:
> >> > chunked^M Date: Thu, 05 Dec 2013 17:47:22 GMT^M ^M
> >> >
> >> >
> >> > <!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "
> >> > http://www.w3.org/TR/html4/loose.dtd"> <!-- intervening content
> >> > elided --> var s
> >>
> >> Unfortunately, curl appears to be "handling" the content for you. I
> >> think you want to look at the raw bytes coming back.
> >>
> >> I can't remember if I installed it myself or what, but you might have
> >> tcpdump on your machine already. Try this:
> >>
> >> $ sudo tcpdump -Xi lo0 src port 8080
> >>
> >
> >I got this back: (apologies if the fixed-width formatting doesn't come
> >through)
> >
> >16:34:44.954734 IP6 localhost.http-alt > localhost.61592: Flags [P.],
> >seq
> >1:9001, ack 146, win 9166, options [nop,nop,TS val 266717589 ecr
> >266717588], length 9000
> >  0x0000:  600e be82 2348 0640 0000 0000 0000 0000  `...#H.@........
> >  0x0010:  0000 0000 0000 0001 0000 0000 0000 0000  ................
> >  0x0020:  0000 0000 0000 0001 1f90 f098 239d 52e7  ............#.R.
> >  0x0030:  95db ddf9 8018 23ce 2350 0000 0101 080a  ......#.#P......
> >  0x0040:  0fe5 c995 0fe5 c994 4854 5450 2f31 2e31  ........HTTP/1.1
> >  0x0050:  2032 3030 204f 4b0d 0a53 6572 7665 723a  .200.OK..Server:
> >  0x0060:  2041 7061 6368 652d 436f 796f 7465 2f31  .Apache-Coyote/1
> >  0x0070:  2e31 0d0a 5365 742d 436f 6f6b 6965 3a20  .1..Set-Cookie:.
> >  0x0080:  4a53 4553 5349 4f4e 4944 3d38 4533 4637  JSESSIONID=8E3F7
> >  0x0090:  4631 4131 4542 4537 3733 3341 3943 3146  F1A1EBE7733A9C1F
> >  0x00a0:  3846 4142 4436 3630 3333 453b 2050 6174  8FABD66033E;.Pat
> >  0x00b0:  683d 2f3b 2048 7474 704f 6e6c 790d 0a43  h=/;.HttpOnly..C
> >  0x00c0:  6f6e 7465 6e74 2d54 7970 653a 2074 6578  ontent-Type:.tex
> >  0x00d0:  742f 6874 6d6c 3b63 6861 7273 6574 3d55  t/html;charset=U
> >  0x00e0:  5446 2d38 0d0a 5472 616e 7366 6572 2d45  TF-8..Transfer-E
> >  0x00f0:  6e63 6f64 696e 673a 2063 6875 6e6b 6564  ncoding:.chunked
> >  0x0100:  0d0a 4461 7465 3a20 4672 692c 2030 3620  ..Date:.Fri,.06.
> >
> >... much redaction ...
> >
> >  0x1df0:  426f 6f6c 6561 6e28 7363 7269 7074 2e64  Boolean(script.d
> >  0x1e00:  6f6e 6529 3b0a 2020 2020 7661 7220 730d  one);.....var.s.
> >  0x1e10:  0a30 0d0a 0d0a                           .0....
> >
> >So it looks like Tomcat is, for some reason, only sending one chunk,
> >which
> >is truncated at an arbitrary point in the output.
>
> Could this arbitrary point be an buffer boundary?  Maybe your servlet is
> causing tomcat to throw an exception an since the response is committed it
> will not be able to show a proper error page nor can it revoke the sent
> bytes.
>
> Have you looked for errors or exceptions in all log files?
>
> Regards
>  Felix
> >
> >>
> >> This will dump everything. You'll need to read a bit to see all the
> >> headers. You might also want to read-up on chunked transfer-encoding.
> >>
> >
> >Based on my rudimentary understanding, Tomcat should be sending
> >multiple
> >chunk-encoded chunks here, right?
> >
> >>
> >> > I'm not using a tool to inspect traffic, because if it becomes
> >> > that troublesome to debug a default install, I'm probably just
> >> > going to use jetty. (full disclosure: I *am* now using jetty, with
> >> > the same web application, and not running into any issues, so
> >> > whatever's going on is in Tomcat world.)
> >>
> >> Can you perhaps reduce the problem to something you could share with
> >> us? Maybe someone on the list would be willing to do all that work so
> >> that Tomcat can get fixed, assuming there is a problem.
> >>
> >
> >Possibly, but I'm not sure I'd succeed in reproducing the issue, given
> >that
> >another gentleman has already made the attempt. I'm hypothesizing at
> >this
> >point that there might be some obscure interaction between the default
> >Tomcat installation and the settings and environment that my IDE is
> >using
> >to launch Tomcat and the web application. If I get a chance, I'll try
> >to
> >put together a simple web app and post it here if I can reproduce the
> >problem. Thanks for the assistance - in the meantime, however, given
> >that
> >I've gotten this to work with Jetty, I need to get back to wrangling
> >with
> >the app itself.
> >
> >
> >>
> >> > In answer to your meta-question, brew seemed to do a reasonable job
> >> > with Tomcat, modulo this issue. I don't know that
> >> > /usr/local/Cellar/tomcat/7.0.47/libexec makes 100% sense for
> >> > $TOMCAT_HOME, but at least everything's in the same place.
> >>
> >> Good to know.
> >>
> >> - -chris
> >> -----BEGIN PGP SIGNATURE-----
> >> Version: GnuPG v1.4.15 (Darwin)
> >> Comment: GPGTools - http://gpgtools.org
> >> Comment: Using GnuPG with Thunderbird - http://www.enigmail.net/
> >>
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> >> UNZgZmunwk6o6hiBHKe2
> >> =bQW3
> >> -----END PGP SIGNATURE-----
> >>
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>
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-- 
C. Benson Manica
cbmanica@gmail.com

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