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Posted to dev@hc.apache.org by Oleg Kalnichevski <ol...@bearingpoint.com> on 2004/10/05 14:50:34 UTC
Re: Unlocatable exception withinhttpclient.HttpRecoverableException
Jeff,
Sometimes, usually when under heavy load, the web server may be able to
receive requests but unable to process them due to low resources (most
commonly worker threads). In such a case the web server may simply have
no other choice but to drop the connection without sending back any
status code. This in turn causes HttpClient to throw a
HttpRecoverableException "unable to find line starting with "HTTP""
Can it be that you have been stressing the server a bit too much?
Anyways, usually "unable to find line starting with "HTTP"" exception is
not a HttpClient fault, but that of the target server. The regrettable
thing about it it is a poor choice of exception class name and a
misleading error message. (This problem has already been fixed in
HttpClient 3.0)
Hope this helps a little
Oleg
On Tue, 2004-10-05 at 08:27, Jeff Fern wrote:
> Hello all,
>
> I am running Tomcat 5.0.27 with Java 1.4.2 on my local machine (Debian
> sarge). I have a Java webapp running on Tomcat, which outputs XML and I am
> using Cocoon 2.1 to style the XML with a static XSLT stylesheet to generate
> HTML.
>
> I have managed to generate an bug which occurs about 80% of the time.
>
> When I submit a form, cocoon generates one of a couple of errors:
>
> org.apache.cocoon.ProcessingException: There is a problem with the URI:
>
>
> <http://127.0.0.1:8080/Conference/GetConference?conferenceName=UbiComp%20200
> 5>
> http://127.0.0.1:8080/Conference/GetConference?conferenceName=UbiComp%202005
> :
>
> org.apache.commons.httpclient.HttpRecoverableException:
>
> org.apache.commons.httpclient.HttpRecoverableException: Error in parsing the
> status line from the response: unable to find line starting with "HTTP"
>
> or org.apache.cocoon.ProcessingException: There is a problem with the
>
> URI: <http://127.0.0.1:8080/Conference/AddDetails>
> http://127.0.0.1:8080/Conference/AddDetails:
>
> org.apache.commons.httpclient.HttpRecoverableException:
>
> java.net.SocketException: Socket closed
>
> Trying to re-submit the same information sometimes displays the correct
> results, sometimes generates an error.
>
> I have enabled logging with log4j using the examples at
> <http://jakarta.apache.org/commons/httpclient/logging.html>
> http://jakarta.apache.org/commons/httpclient/logging.html The only ouput
> generated in the log file is:
>
> - Recoverable exception caught when processing request
>
> - Recoverable exception caught but MethodRetryHandler.retryMethod()
>
> returned false, rethrowing exception
>
> I have also tried my code on Tomcat 5.5 with Java 1.5 and get the exact same
> results.
>
> I am unable to locate any piece of my code that causes this error.
>
> Any help or suggestions would be much appreciated,
>
> Regards,
>
>
>
>
>
>
>
>
>
> -Jeff Fern
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Re: Unlocatable exception withinhttpclient.HttpRecoverableException
Posted by Michael Becke <be...@u.washington.edu>.
Hi Jeff,
Is it possible that you're using the same HttpConnection from more than
one thread/method? Is the same SimpleHttpConnectionManager being
shared?
If not I would suggest disabling connection reuse. This can usually be
done by setting the following header on each method.
method.setRequestHeader("Connection", "close");
Mike
On Oct 5, 2004, at 6:05 PM, Jeff Fern wrote:
> Hello,
>
> Thank-you for your reply. I do not believe that the errors can be
> caused
> due to the server being overloaded - it is my desktop machine and the
> only
> person accessing the web server is myself. Additionally, the machine
> is not
> doing anything intensive (just running X, firefox and eclipse), it is
> an
> Athlon 2800+ with 512MB RAM.
>
> The fact that I also get a socket closed message as well as "unable to
> find
> line starting with "HTTP" is also confusing me :/
>
> Regards,
>
>
> -Jeff Fern
> -----Original Message-----
> From: Oleg Kalnichevski [mailto:oleg.kalnichevski@bearingpoint.com]
> Sent: 05 October 2004 13:51
> To: Commons HttpClient Project
> Cc: Jeff Fern
> Subject: Re: Unlocatable exception
> withinhttpclient.HttpRecoverableException
>
>
> Jeff,
>
> Sometimes, usually when under heavy load, the web server may be able to
> receive requests but unable to process them due to low resources (most
> commonly worker threads). In such a case the web server may simply
> have no
> other choice but to drop the connection without sending back any status
> code. This in turn causes HttpClient to throw a
> HttpRecoverableException
> "unable to find line starting with "HTTP""
>
> Can it be that you have been stressing the server a bit too much?
>
> Anyways, usually "unable to find line starting with "HTTP"" exception
> is not
> a HttpClient fault, but that of the target server. The regrettable
> thing
> about it it is a poor choice of exception class name and a misleading
> error
> message. (This problem has already been fixed in HttpClient 3.0)
>
> Hope this helps a little
>
> Oleg
>
> On Tue, 2004-10-05 at 08:27, Jeff Fern wrote:
>> Hello all,
>>
>> I am running Tomcat 5.0.27 with Java 1.4.2 on my local machine (Debian
>> sarge). I have a Java webapp running on Tomcat, which outputs XML and
>> I am using Cocoon 2.1 to style the XML with a static XSLT stylesheet
>> to generate HTML.
>>
>> I have managed to generate an bug which occurs about 80% of the time.
>>
>> When I submit a form, cocoon generates one of a couple of errors:
>>
>> org.apache.cocoon.ProcessingException: There is a problem with the
>> URI:
>>
>>
>> <http://127.0.0.1:8080/Conference/GetConference?conferenceName=UbiComp
>> %20200
>> 5>
>> http://127.0.0.1:8080/Conference/GetConference?conferenceName=UbiComp%
>> 202005
>> :
>>
>> org.apache.commons.httpclient.HttpRecoverableException:
>>
>> org.apache.commons.httpclient.HttpRecoverableException: Error in
>> parsing the status line from the response: unable to find line
>> starting
> with "HTTP"
>>
>> or org.apache.cocoon.ProcessingException: There is a problem with the
>>
>> URI: <http://127.0.0.1:8080/Conference/AddDetails>
>> http://127.0.0.1:8080/Conference/AddDetails:
>>
>> org.apache.commons.httpclient.HttpRecoverableException:
>>
>> java.net.SocketException: Socket closed
>>
>> Trying to re-submit the same information sometimes displays the
>> correct results, sometimes generates an error.
>>
>> I have enabled logging with log4j using the examples at
>> <http://jakarta.apache.org/commons/httpclient/logging.html>
>> http://jakarta.apache.org/commons/httpclient/logging.html The only
>> ouput generated in the log file is:
>>
>> - Recoverable exception caught when processing request
>>
>> - Recoverable exception caught but MethodRetryHandler.retryMethod()
>>
>> returned false, rethrowing exception
>>
>> I have also tried my code on Tomcat 5.5 with Java 1.5 and get the
>> exact same results.
>>
>> I am unable to locate any piece of my code that causes this error.
>>
>> Any help or suggestions would be much appreciated,
>>
>> Regards,
>>
>>
>>
>>
>>
>>
>>
>>
>>
>> -Jeff Fern
>
> ***********************************************************************
> *****
> ***********************
> The information in this email is confidential and may be legally
> privileged.
> Access to this email by anyone other than the intended addressee is
> unauthorized. If you are not the intended recipient of this message,
> any
> review, disclosure, copying, distribution, retention, or any action
> taken or
> omitted to be taken in reliance on it is prohibited and may be
> unlawful. If
> you are not the intended recipient, please reply to or forward a copy
> of
> this message to the sender and delete the message, any attachments,
> and any
> copies thereof from your system.
> ***********************************************************************
> *****
> ***********************
>
>
> ---------------------------------------------------------------------
> To unsubscribe, e-mail:
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> For additional commands, e-mail:
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RE: Unlocatable exception withinhttpclient.HttpRecoverableException
Posted by Jeff Fern <Je...@fcse.co.uk>.
Hello,
Thank-you for your reply. I do not believe that the errors can be caused
due to the server being overloaded - it is my desktop machine and the only
person accessing the web server is myself. Additionally, the machine is not
doing anything intensive (just running X, firefox and eclipse), it is an
Athlon 2800+ with 512MB RAM.
The fact that I also get a socket closed message as well as "unable to find
line starting with "HTTP" is also confusing me :/
Regards,
-Jeff Fern
-----Original Message-----
From: Oleg Kalnichevski [mailto:oleg.kalnichevski@bearingpoint.com]
Sent: 05 October 2004 13:51
To: Commons HttpClient Project
Cc: Jeff Fern
Subject: Re: Unlocatable exception withinhttpclient.HttpRecoverableException
Jeff,
Sometimes, usually when under heavy load, the web server may be able to
receive requests but unable to process them due to low resources (most
commonly worker threads). In such a case the web server may simply have no
other choice but to drop the connection without sending back any status
code. This in turn causes HttpClient to throw a HttpRecoverableException
"unable to find line starting with "HTTP""
Can it be that you have been stressing the server a bit too much?
Anyways, usually "unable to find line starting with "HTTP"" exception is not
a HttpClient fault, but that of the target server. The regrettable thing
about it it is a poor choice of exception class name and a misleading error
message. (This problem has already been fixed in HttpClient 3.0)
Hope this helps a little
Oleg
On Tue, 2004-10-05 at 08:27, Jeff Fern wrote:
> Hello all,
>
> I am running Tomcat 5.0.27 with Java 1.4.2 on my local machine (Debian
> sarge). I have a Java webapp running on Tomcat, which outputs XML and
> I am using Cocoon 2.1 to style the XML with a static XSLT stylesheet
> to generate HTML.
>
> I have managed to generate an bug which occurs about 80% of the time.
>
> When I submit a form, cocoon generates one of a couple of errors:
>
> org.apache.cocoon.ProcessingException: There is a problem with the URI:
>
>
> <http://127.0.0.1:8080/Conference/GetConference?conferenceName=UbiComp
> %20200
> 5>
> http://127.0.0.1:8080/Conference/GetConference?conferenceName=UbiComp%
> 202005
> :
>
> org.apache.commons.httpclient.HttpRecoverableException:
>
> org.apache.commons.httpclient.HttpRecoverableException: Error in
> parsing the status line from the response: unable to find line starting
with "HTTP"
>
> or org.apache.cocoon.ProcessingException: There is a problem with the
>
> URI: <http://127.0.0.1:8080/Conference/AddDetails>
> http://127.0.0.1:8080/Conference/AddDetails:
>
> org.apache.commons.httpclient.HttpRecoverableException:
>
> java.net.SocketException: Socket closed
>
> Trying to re-submit the same information sometimes displays the
> correct results, sometimes generates an error.
>
> I have enabled logging with log4j using the examples at
> <http://jakarta.apache.org/commons/httpclient/logging.html>
> http://jakarta.apache.org/commons/httpclient/logging.html The only
> ouput generated in the log file is:
>
> - Recoverable exception caught when processing request
>
> - Recoverable exception caught but MethodRetryHandler.retryMethod()
>
> returned false, rethrowing exception
>
> I have also tried my code on Tomcat 5.5 with Java 1.5 and get the
> exact same results.
>
> I am unable to locate any piece of my code that causes this error.
>
> Any help or suggestions would be much appreciated,
>
> Regards,
>
>
>
>
>
>
>
>
>
> -Jeff Fern
****************************************************************************
***********************
The information in this email is confidential and may be legally privileged.
Access to this email by anyone other than the intended addressee is
unauthorized. If you are not the intended recipient of this message, any
review, disclosure, copying, distribution, retention, or any action taken or
omitted to be taken in reliance on it is prohibited and may be unlawful. If
you are not the intended recipient, please reply to or forward a copy of
this message to the sender and delete the message, any attachments, and any
copies thereof from your system.
****************************************************************************
***********************
---------------------------------------------------------------------
To unsubscribe, e-mail: commons-httpclient-dev-unsubscribe@jakarta.apache.org
For additional commands, e-mail: commons-httpclient-dev-help@jakarta.apache.org