Re: Unlocatable exception withinhttpclient.HttpRecoverableException

[Michael Becke]

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:[EMAIL PROTECTED]
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:  
[EMAIL PROTECTED]
For additional commands, e-mail:  
[EMAIL PROTECTED]


-
To unsubscribe, e-mail: [EMAIL PROTECTED]
For additional commands, e-mail: [EMAIL PROTECTED]

RE: Unlocatable exception withinhttpclient.HttpRecoverableException

[Jeff Fern]

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:[EMAIL PROTECTED] 
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: [EMAIL PROTECTED]
For additional commands, e-mail: [EMAIL PROTECTED]

Re: Unlocatable exception withinhttpclient.HttpRecoverableException

[Oleg Kalnichevski]

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:
> 
>  
>  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:
> 
> 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 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: [EMAIL PROTECTED]
For additional commands, e-mail: [EMAIL PROTECTED]