Hello Oleg,
Five months ago, I sent you the emails below because I was experiencing a
lot of NoHttpResponseException errors when sending requests to a couple of
servers.
Yesterday night, I installed my app with H4 in one of my clients. This
morning I've had to move back to H3 because of these errors.
The app consists of a proxy that is sending requests to 3 different
webservices. The app has a different connection pool for each webservice,
and the target servers are also different for each one.
App -> requests to Webservice1 --> uses pool1 --> send to serversA,B
-> requests to Webservice2 --> uses pool2 --> send to serversC,D
-> requests to Webservice3 --> uses pool3 --> send to serversE,F
The results for webservice1 are:
Tuesday 22/07: HttpClient 3.1. Total Requests sent : 175.003
>From 00:00 to 23:59 OK Requests :
174.936
Error Requests: :
67
Wednes. 23/07: HttpClient 4.0 Total Requests sent : 54.851
>From 00:00 to 13:30 OK Requests :
51.183
Error Requests: :
3.668
>From these 3.668 errors, 3.647 corresponding to NoHttpResponseException.
The error percentages are similar in ws2 and ws3. The target servers for the
ws1 and ws2 are in the same LAN than my app, while target servers for w3 are
on the Internet.
After moving back to H3, again 0 errors in the last 2 hours.
Please, just tell me what you need to get more information about this
problem (traces, configurations, ...). Anything you need.
Thanks in advance,
Joan.
-----Mensaje original-----
De: Oleg Kalnichevski [mailto:ol...@apache.org]
Enviado el: sábado, 07 de febrero de 2009 14:08
Para: HttpClient User Discussion
Asunto: Re: NO_HTTP_RESPONSE_EXCEPTION
sebb wrote:
> On 06/02/2009, Oleg Kalnichevski <ol...@apache.org> wrote:
>> Joan Balagueró wrote:
>>
>>> Thanks Oleg. It seems strange to me because HttpClient3 (sending
requests
>> to
>>> the same server) never fails. I'll take a look at the code again and
I'll
>>> comment you something else.
>>>
>>>
>> I do not know why the server chokes on packets generated by HttpClient
4,
>> but this is clearly a server side problem. The server should return a non
>> 2xx response if something is not okay, not just drop the connection.
>>
>> HTTP/1.0 can be a problem or absence of User-Agent header. Whatever. At
any
>> rate the server is broken.
>>
>>
>>
On Fri, 2009-02-06 at 13:44 +0100, Joan Balagueró wrote:
> Hello Oleg,
>
>
> This is the log. I sent 10 concurrent requests, and all of them failed
> with HttpNoResponseException.
>
>
> Thanks for you help,
>
> Joan.
>
There is nothing wrong with packets generated by HttpClient. This appears to
be a server side issue. The target server fails to send any valid response
back and simply closes the connection.
Oleg
> -----Mensaje original-----
> De: Oleg Kalnichevski [mailto:ol...@apache.org] Enviado el: jueves, 05
> de febrero de 2009 21:44
> Para: HttpClient User Discussion
> Asunto: Re: NO_HTTP_RESPONSE_EXCEPTION
>
> Joan Balagueró wrote:
> > Hello,
> >
> >
> >
> > Im sending requests to one server using HttpClient3 and HttpClient4.
> > HttpClient3 works well, but HttpClient4 fails randomly with an
> > HttpNoResponseException.
> >
> > This is the trace:
> > org.apache.http.NoHttpResponseException: The target server failed to
> respond
> > at
> org.apache.http.impl.conn.DefaultResponseParser.parseHead(DefaultRespo
> nsePar
> > ser.java:85)
> > at
> org.apache.http.impl.io.AbstractMessageParser.parse(AbstractMessagePar
> ser.ja
> > va:174)
> > at
> org.apache.http.impl.AbstractHttpClientConnection.receiveResponseHeade
> r(Abst
> > ractHttpClientConnection.java:182)
> > at
> org.apache.http.impl.conn.DefaultClientConnection.receiveResponseHeade
> r(Defa
> > ultClientConnection.java:235)
> > at
> org.apache.http.impl.conn.AbstractClientConnAdapter.receiveResponseHea
> der(Ab
> > stractClientConnAdapter.java:259)
> > at
> org.apache.http.protocol.HttpRequestExecutor.doReceiveResponse(HttpReq
> uestEx
> > ecutor.java:279)
> > at
> org.apache.http.protocol.HttpRequestExecutor.execute(HttpRequestExecut
> or.jav
> > a:121)
> > at
> org.apache.http.impl.client.DefaultRequestDirector.execute(DefaultRequ
> estDir
> > ector.java:410)
> > at
> org.apache.http.impl.client.AbstractHttpClient.execute(AbstractHttpCli
> ent.ja
> > va:555)
> > at
> org.apache.http.impl.client.AbstractHttpClient.execute(AbstractHttpCli
> ent.ja
> > va:487)
> > at
> org.apache.http.impl.client.AbstractHttpClient.execute(AbstractHttpCli
> ent.ja
> > va:465)
> > at
> > com.vpfw.proxy.services.http.HttpService.sendRequest(HttpService.jav
> > a:562)
> >
> >
> > Do you know if any other people has had a problem like this?
> >
> >
>
> Not to my best knowledge.
>
>
> Set 'org.apache.http' logging category to DEBUG and post the resulting
> wire / context log to the list. I'll have a look.
>
> Oleg
>
> >
> > Thanks,
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