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Posted to httpclient-users@hc.apache.org by Joan Balagueró Valls <jo...@grupoventus.com> on 2009/07/22 14:17:17 UTC
RV: NO_HTTP_RESPONSE_EXCEPTION
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:olegk@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:olegk@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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Re: RV: NO_HTTP_RESPONSE_EXCEPTION
Posted by Oleg Kalnichevski <ol...@apache.org>.
Joan Balagueró Valls wrote:
> Hello Oleg,
>
> Ok, then, in your opinion, it seems that some connections were closed on the
> server side, but for H4 they are OK, and when H4 tries to use them, then a
> NoHttpResponseException is thrown.
>
> In fact, I've implemented an IdleConnectionsHandler that closes expired
> connections and idle connections (with a timeout). Now, this process is
> executed every 5 minutes, and closes expired connections and connections
> idle for more than 60 seconds.
>
> I suppose that this is too much wait time. What values do you recommend?
>
There is no way other than finding it by trial and error. Please note,
though, keep-alive value can be set on a per host basis. You may want to
set a low (30 sec) keep alive period for those hosts that are known to
be a problem.
> Another question: the same app works perfectly with Http3. What does it
> mean? Is H4 much more "sensible" to server closed connections than H3?
> I've never used the stale check (H3 or H4).
>
I cannot say without seeing the logs
Oleg
> Thanks,
>
> Joan.
>
>
> -----Mensaje original-----
> De: Oleg Kalnichevski [mailto:olegk@apache.org]
> Enviado el: miércoles, 22 de julio de 2009 18:42
> Para: HttpClient User Discussion
> Asunto: Re: RV: NO_HTTP_RESPONSE_EXCEPTION
>
> On Wed, Jul 22, 2009 at 06:06:25PM +0200, Joan Balaguer? Valls wrote:
>> Hello Oleg,
>>
>> I attach the http log.
>
> Hi Joan,
>
> Unfortunately the log did not get through
>
>
> I've been taking a look to this trace, and I've
>> observed the following. I don't know if it's important or not.
>>
>> In line 53315, we have a request that is correctly processed. When
>> HttpClient tries to get a connection from pool, the information is:
>>
>> Total connections kept alive: 2
>> Total issued connections: 0
>> Total allocated connection: 2 out of 100
>> Getting free connection [HttpRoute[{}->http://192.168.38.87:80]][null]
>>
>>
>> The following request fails with noHttpResponse (starts at line 53362). In
>> this request, when HttpClient tries to get a connection from pool, the
>> information is:
>>
>> Total connections kept alive: 11
>> Total issued connections: 0
>> Total allocated connection: 11 out of 100
>> Getting free connection [HttpRoute[{}->http://192.168.46.152:11003]][null]
>>
>>
>> Is it normal that this request shows a pool with 11 allocated connections
>> when the previous request only shows 2?
>>
>
> It is normal. Those two requests have _completely_ different routes.
>
>
>> Here, httpNoResponseException starts until the pool is empty. You can see
> 11
>> consecutive erroneous requests with "Connection closed" and "Released
>> connection is not reusable" UNTIL "total allocated connection" is 0.
>>
>> When "total allocated connection" is 0, HttpClient has to create a new
>> connection (line 53713), and then everything works again.
>>
>
> It is all very simple. Those 11 connections have most likely been idle for
> two
> long and therefore got dropped on the server side. You should either use the
> stale connection check or implement some sort of a stale connection eviction
> policy to make sure HttpClient does not try to re-use them. For details see
>
> http://hc.apache.org/httpcomponents-client/tutorial/html/ch02.html#d4e638
>
> Hope this helps
>
> Oleg
>
>
>
>
>> Well, exactly the same situation is reproduced starting at line 66610.
>> In this line, the request goes OK. The information is:
>>
>> Total connections kept alive: 2
>> Total issued connections: 0
>> Total allocated connection: 2 out of 100
>> Getting free connection [HttpRoute[{}->http://10.12.112.180:12003]][null]
>>
>>
>> The following request again fails, and the information is:
>> Total connections kept alive: 10
>> Total issued connections: 0
>> Total allocated connection: 10 out of 100
>> Getting free connection [HttpRoute[{}->http://192.168.46.152:11003]][null]
>>
>> Again, we can see 10 consecutive erroneous requests, until allocated
>> connections comes 0 again. In this point, everything starts to work again
>> when Httpclient has to create a new connection.
>>
>>
>> I try to attach the log file as a zip file. Last time it was impossible to
>> send it to you. If you don't receive it, tell how I can send it.
>>
>>
>> Thanks for your time, Oleg.
>>
>> Joan.
>>
>>
>> -----Mensaje original-----
>> De: Oleg Kalnichevski [mailto:olegk@apache.org]
>> Enviado el: mi?rcoles, 22 de julio de 2009 14:41
>> Para: HttpClient User Discussion
>> Asunto: Re: RV: NO_HTTP_RESPONSE_EXCEPTION
>>
>> On Wed, Jul 22, 2009 at 02:17:17PM +0200, Joan Balaguer? Valls wrote:
>>> 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
>>>
>>>
>>
>> Joan,
>>
>> Please post a context / wire log of the HTTP session that exhibits the
>> problem
>>
>> http://hc.apache.org/httpcomponents-client/logging.html
>>
>> Please also consider using the latest HttpClient 4.0 RC build:
>>
>> http://people.apache.org/~olegk/httpclient-4.0-rc2/
>>
>> Mind you it is very unlikely this has anything to do with HttpClient, so
>> expect no miracles.
>>
>> Oleg
>>
>>
>>
>>> 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:olegk@apache.org]
>>> Enviado el: s?bado, 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 Balaguer? 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 Balaguer? 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:olegk@apache.org] Enviado el: jueves, 05
>
>>>> de febrero de 2009 21:44
>>>> Para: HttpClient User Discussion
>>>> Asunto: Re: NO_HTTP_RESPONSE_EXCEPTION
>>>>
>>>> Joan Balaguer? wrote:
>>>>> Hello,
>>>>>
>>>>>
>>>>>
>>>>> I?m 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,
>>>
>>>
>>> ---------------------------------------------------------------------
>>> To unsubscribe, e-mail: httpclient-users-unsubscribe@hc.apache.org
>>> For additional commands, e-mail: httpclient-users-help@hc.apache.org
>>>
>> ---------------------------------------------------------------------
>> To unsubscribe, e-mail: httpclient-users-unsubscribe@hc.apache.org
>> For additional commands, e-mail: httpclient-users-help@hc.apache.org
>>
>>
>
>> ---------------------------------------------------------------------
>> To unsubscribe, e-mail: httpclient-users-unsubscribe@hc.apache.org
>> For additional commands, e-mail: httpclient-users-help@hc.apache.org
>
> ---------------------------------------------------------------------
> To unsubscribe, e-mail: httpclient-users-unsubscribe@hc.apache.org
> For additional commands, e-mail: httpclient-users-help@hc.apache.org
>
>
>
> ---------------------------------------------------------------------
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> For additional commands, e-mail: httpclient-users-help@hc.apache.org
>
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RE: RV: NO_HTTP_RESPONSE_EXCEPTION
Posted by Joan Balagueró Valls <jo...@grupoventus.com>.
Hello Oleg,
Ok, then, in your opinion, it seems that some connections were closed on the
server side, but for H4 they are OK, and when H4 tries to use them, then a
NoHttpResponseException is thrown.
In fact, I've implemented an IdleConnectionsHandler that closes expired
connections and idle connections (with a timeout). Now, this process is
executed every 5 minutes, and closes expired connections and connections
idle for more than 60 seconds.
I suppose that this is too much wait time. What values do you recommend?
Another question: the same app works perfectly with Http3. What does it
mean? Is H4 much more "sensible" to server closed connections than H3?
I've never used the stale check (H3 or H4).
Thanks,
Joan.
-----Mensaje original-----
De: Oleg Kalnichevski [mailto:olegk@apache.org]
Enviado el: miércoles, 22 de julio de 2009 18:42
Para: HttpClient User Discussion
Asunto: Re: RV: NO_HTTP_RESPONSE_EXCEPTION
On Wed, Jul 22, 2009 at 06:06:25PM +0200, Joan Balaguer? Valls wrote:
> Hello Oleg,
>
> I attach the http log.
Hi Joan,
Unfortunately the log did not get through
I've been taking a look to this trace, and I've
> observed the following. I don't know if it's important or not.
>
> In line 53315, we have a request that is correctly processed. When
> HttpClient tries to get a connection from pool, the information is:
>
> Total connections kept alive: 2
> Total issued connections: 0
> Total allocated connection: 2 out of 100
> Getting free connection [HttpRoute[{}->http://192.168.38.87:80]][null]
>
>
> The following request fails with noHttpResponse (starts at line 53362). In
> this request, when HttpClient tries to get a connection from pool, the
> information is:
>
> Total connections kept alive: 11
> Total issued connections: 0
> Total allocated connection: 11 out of 100
> Getting free connection [HttpRoute[{}->http://192.168.46.152:11003]][null]
>
>
> Is it normal that this request shows a pool with 11 allocated connections
> when the previous request only shows 2?
>
It is normal. Those two requests have _completely_ different routes.
> Here, httpNoResponseException starts until the pool is empty. You can see
11
> consecutive erroneous requests with "Connection closed" and "Released
> connection is not reusable" UNTIL "total allocated connection" is 0.
>
> When "total allocated connection" is 0, HttpClient has to create a new
> connection (line 53713), and then everything works again.
>
It is all very simple. Those 11 connections have most likely been idle for
two
long and therefore got dropped on the server side. You should either use the
stale connection check or implement some sort of a stale connection eviction
policy to make sure HttpClient does not try to re-use them. For details see
http://hc.apache.org/httpcomponents-client/tutorial/html/ch02.html#d4e638
Hope this helps
Oleg
> Well, exactly the same situation is reproduced starting at line 66610.
> In this line, the request goes OK. The information is:
>
> Total connections kept alive: 2
> Total issued connections: 0
> Total allocated connection: 2 out of 100
> Getting free connection [HttpRoute[{}->http://10.12.112.180:12003]][null]
>
>
> The following request again fails, and the information is:
> Total connections kept alive: 10
> Total issued connections: 0
> Total allocated connection: 10 out of 100
> Getting free connection [HttpRoute[{}->http://192.168.46.152:11003]][null]
>
> Again, we can see 10 consecutive erroneous requests, until allocated
> connections comes 0 again. In this point, everything starts to work again
> when Httpclient has to create a new connection.
>
>
> I try to attach the log file as a zip file. Last time it was impossible to
> send it to you. If you don't receive it, tell how I can send it.
>
>
> Thanks for your time, Oleg.
>
> Joan.
>
>
> -----Mensaje original-----
> De: Oleg Kalnichevski [mailto:olegk@apache.org]
> Enviado el: mi?rcoles, 22 de julio de 2009 14:41
> Para: HttpClient User Discussion
> Asunto: Re: RV: NO_HTTP_RESPONSE_EXCEPTION
>
> On Wed, Jul 22, 2009 at 02:17:17PM +0200, Joan Balaguer? Valls wrote:
> > 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
> >
> >
>
>
> Joan,
>
> Please post a context / wire log of the HTTP session that exhibits the
> problem
>
> http://hc.apache.org/httpcomponents-client/logging.html
>
> Please also consider using the latest HttpClient 4.0 RC build:
>
> http://people.apache.org/~olegk/httpclient-4.0-rc2/
>
> Mind you it is very unlikely this has anything to do with HttpClient, so
> expect no miracles.
>
> Oleg
>
>
>
> > 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:olegk@apache.org]
> > Enviado el: s?bado, 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 Balaguer? 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 Balaguer? 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:olegk@apache.org] Enviado el: jueves, 05
> > > de febrero de 2009 21:44
> > > Para: HttpClient User Discussion
> > > Asunto: Re: NO_HTTP_RESPONSE_EXCEPTION
> > >
> > > Joan Balaguer? wrote:
> > > > Hello,
> > > >
> > > >
> > > >
> > > > I?m 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,
> >
> >
> >
> > ---------------------------------------------------------------------
> > To unsubscribe, e-mail: httpclient-users-unsubscribe@hc.apache.org
> > For additional commands, e-mail: httpclient-users-help@hc.apache.org
> >
>
> ---------------------------------------------------------------------
> To unsubscribe, e-mail: httpclient-users-unsubscribe@hc.apache.org
> For additional commands, e-mail: httpclient-users-help@hc.apache.org
>
>
>
> ---------------------------------------------------------------------
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---------------------------------------------------------------------
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Re: RV: NO_HTTP_RESPONSE_EXCEPTION
Posted by Oleg Kalnichevski <ol...@apache.org>.
On Wed, Jul 22, 2009 at 06:06:25PM +0200, Joan Balaguer? Valls wrote:
> Hello Oleg,
>
> I attach the http log.
Hi Joan,
Unfortunately the log did not get through
I've been taking a look to this trace, and I've
> observed the following. I don't know if it's important or not.
>
> In line 53315, we have a request that is correctly processed. When
> HttpClient tries to get a connection from pool, the information is:
>
> Total connections kept alive: 2
> Total issued connections: 0
> Total allocated connection: 2 out of 100
> Getting free connection [HttpRoute[{}->http://192.168.38.87:80]][null]
>
>
> The following request fails with noHttpResponse (starts at line 53362). In
> this request, when HttpClient tries to get a connection from pool, the
> information is:
>
> Total connections kept alive: 11
> Total issued connections: 0
> Total allocated connection: 11 out of 100
> Getting free connection [HttpRoute[{}->http://192.168.46.152:11003]][null]
>
>
> Is it normal that this request shows a pool with 11 allocated connections
> when the previous request only shows 2?
>
It is normal. Those two requests have _completely_ different routes.
> Here, httpNoResponseException starts until the pool is empty. You can see 11
> consecutive erroneous requests with "Connection closed" and "Released
> connection is not reusable" UNTIL "total allocated connection" is 0.
>
> When "total allocated connection" is 0, HttpClient has to create a new
> connection (line 53713), and then everything works again.
>
It is all very simple. Those 11 connections have most likely been idle for two
long and therefore got dropped on the server side. You should either use the
stale connection check or implement some sort of a stale connection eviction
policy to make sure HttpClient does not try to re-use them. For details see
http://hc.apache.org/httpcomponents-client/tutorial/html/ch02.html#d4e638
Hope this helps
Oleg
> Well, exactly the same situation is reproduced starting at line 66610.
> In this line, the request goes OK. The information is:
>
> Total connections kept alive: 2
> Total issued connections: 0
> Total allocated connection: 2 out of 100
> Getting free connection [HttpRoute[{}->http://10.12.112.180:12003]][null]
>
>
> The following request again fails, and the information is:
> Total connections kept alive: 10
> Total issued connections: 0
> Total allocated connection: 10 out of 100
> Getting free connection [HttpRoute[{}->http://192.168.46.152:11003]][null]
>
> Again, we can see 10 consecutive erroneous requests, until allocated
> connections comes 0 again. In this point, everything starts to work again
> when Httpclient has to create a new connection.
>
>
> I try to attach the log file as a zip file. Last time it was impossible to
> send it to you. If you don't receive it, tell how I can send it.
>
>
> Thanks for your time, Oleg.
>
> Joan.
>
>
> -----Mensaje original-----
> De: Oleg Kalnichevski [mailto:olegk@apache.org]
> Enviado el: mi?rcoles, 22 de julio de 2009 14:41
> Para: HttpClient User Discussion
> Asunto: Re: RV: NO_HTTP_RESPONSE_EXCEPTION
>
> On Wed, Jul 22, 2009 at 02:17:17PM +0200, Joan Balaguer? Valls wrote:
> > 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
> >
> >
>
>
> Joan,
>
> Please post a context / wire log of the HTTP session that exhibits the
> problem
>
> http://hc.apache.org/httpcomponents-client/logging.html
>
> Please also consider using the latest HttpClient 4.0 RC build:
>
> http://people.apache.org/~olegk/httpclient-4.0-rc2/
>
> Mind you it is very unlikely this has anything to do with HttpClient, so
> expect no miracles.
>
> Oleg
>
>
>
> > 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:olegk@apache.org]
> > Enviado el: s?bado, 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 Balaguer? 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 Balaguer? 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:olegk@apache.org] Enviado el: jueves, 05
> > > de febrero de 2009 21:44
> > > Para: HttpClient User Discussion
> > > Asunto: Re: NO_HTTP_RESPONSE_EXCEPTION
> > >
> > > Joan Balaguer? wrote:
> > > > Hello,
> > > >
> > > >
> > > >
> > > > I?m 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,
> >
> >
> >
> > ---------------------------------------------------------------------
> > To unsubscribe, e-mail: httpclient-users-unsubscribe@hc.apache.org
> > For additional commands, e-mail: httpclient-users-help@hc.apache.org
> >
>
> ---------------------------------------------------------------------
> To unsubscribe, e-mail: httpclient-users-unsubscribe@hc.apache.org
> For additional commands, e-mail: httpclient-users-help@hc.apache.org
>
>
>
> ---------------------------------------------------------------------
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---------------------------------------------------------------------
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RE: RV: NO_HTTP_RESPONSE_EXCEPTION
Posted by Joan Balagueró Valls <jo...@grupoventus.com>.
Hello Oleg,
I attach the http log. I've been taking a look to this trace, and I've
observed the following. I don't know if it's important or not.
In line 53315, we have a request that is correctly processed. When
HttpClient tries to get a connection from pool, the information is:
Total connections kept alive: 2
Total issued connections: 0
Total allocated connection: 2 out of 100
Getting free connection [HttpRoute[{}->http://192.168.38.87:80]][null]
The following request fails with noHttpResponse (starts at line 53362). In
this request, when HttpClient tries to get a connection from pool, the
information is:
Total connections kept alive: 11
Total issued connections: 0
Total allocated connection: 11 out of 100
Getting free connection [HttpRoute[{}->http://192.168.46.152:11003]][null]
Is it normal that this request shows a pool with 11 allocated connections
when the previous request only shows 2?
Here, httpNoResponseException starts until the pool is empty. You can see 11
consecutive erroneous requests with "Connection closed" and "Released
connection is not reusable" UNTIL "total allocated connection" is 0.
When "total allocated connection" is 0, HttpClient has to create a new
connection (line 53713), and then everything works again.
Well, exactly the same situation is reproduced starting at line 66610.
In this line, the request goes OK. The information is:
Total connections kept alive: 2
Total issued connections: 0
Total allocated connection: 2 out of 100
Getting free connection [HttpRoute[{}->http://10.12.112.180:12003]][null]
The following request again fails, and the information is:
Total connections kept alive: 10
Total issued connections: 0
Total allocated connection: 10 out of 100
Getting free connection [HttpRoute[{}->http://192.168.46.152:11003]][null]
Again, we can see 10 consecutive erroneous requests, until allocated
connections comes 0 again. In this point, everything starts to work again
when Httpclient has to create a new connection.
I try to attach the log file as a zip file. Last time it was impossible to
send it to you. If you don't receive it, tell how I can send it.
Thanks for your time, Oleg.
Joan.
-----Mensaje original-----
De: Oleg Kalnichevski [mailto:olegk@apache.org]
Enviado el: mi�rcoles, 22 de julio de 2009 14:41
Para: HttpClient User Discussion
Asunto: Re: RV: NO_HTTP_RESPONSE_EXCEPTION
On Wed, Jul 22, 2009 at 02:17:17PM +0200, Joan Balaguer? Valls wrote:
> 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
>
>
Joan,
Please post a context / wire log of the HTTP session that exhibits the
problem
http://hc.apache.org/httpcomponents-client/logging.html
Please also consider using the latest HttpClient 4.0 RC build:
http://people.apache.org/~olegk/httpclient-4.0-rc2/
Mind you it is very unlikely this has anything to do with HttpClient, so
expect no miracles.
Oleg
> 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:olegk@apache.org]
> Enviado el: s?bado, 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 Balaguer? 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 Balaguer? 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:olegk@apache.org] Enviado el: jueves, 05
> > de febrero de 2009 21:44
> > Para: HttpClient User Discussion
> > Asunto: Re: NO_HTTP_RESPONSE_EXCEPTION
> >
> > Joan Balaguer? wrote:
> > > Hello,
> > >
> > >
> > >
> > > I?m 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,
>
>
>
> ---------------------------------------------------------------------
> To unsubscribe, e-mail: httpclient-users-unsubscribe@hc.apache.org
> For additional commands, e-mail: httpclient-users-help@hc.apache.org
>
---------------------------------------------------------------------
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For additional commands, e-mail: httpclient-users-help@hc.apache.org
Re: RV: NO_HTTP_RESPONSE_EXCEPTION
Posted by Oleg Kalnichevski <ol...@apache.org>.
On Wed, Jul 22, 2009 at 02:17:17PM +0200, Joan Balaguer? Valls wrote:
> 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
>
>
Joan,
Please post a context / wire log of the HTTP session that exhibits the problem
http://hc.apache.org/httpcomponents-client/logging.html
Please also consider using the latest HttpClient 4.0 RC build:
http://people.apache.org/~olegk/httpclient-4.0-rc2/
Mind you it is very unlikely this has anything to do with HttpClient, so
expect no miracles.
Oleg
> 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:olegk@apache.org]
> Enviado el: s?bado, 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 Balaguer? 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 Balaguer? 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:olegk@apache.org] Enviado el: jueves, 05
> > de febrero de 2009 21:44
> > Para: HttpClient User Discussion
> > Asunto: Re: NO_HTTP_RESPONSE_EXCEPTION
> >
> > Joan Balaguer? wrote:
> > > Hello,
> > >
> > >
> > >
> > > I?m 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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