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Posted to httpclient-users@hc.apache.org by Olivier Lamy <ol...@apache.org> on 2010/01/06 19:08:21 UTC
Retry on ConnectTimeoutException
Hi,
I'm using http-client 4.0.1.
Is there any way to use HttpRequestRetryHandler to handle retry on
ConnectTimeoutException ? (I did it with http client 3 )
Thanks,
--
Olivier
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Re: Retry on ConnectTimeoutException
Posted by Olivier Lamy <ol...@apache.org>.
HTTPCLIENT-902.
Fix and junit included.
So I haven't touched the interface HttpRequestRetryHandler.
which says : boolean retryRequest(IOException exception, int
executionCount, HttpContext context);
As ConnectTimeoutException extends InterruptedIOException, I have
overrid IOException.getCause() to return ConnectTimeoutException
Thanks,
--
Olivier
2010/1/7 Oleg Kalnichevski <ol...@apache.org>:
> On Thu, 2010-01-07 at 11:14 +0100, Olivier Lamy wrote:
>> Hi,
>> Sure, I will.
>> If I want to provide a patch do I have to do it on the 4.0.x branch or trunk ?
>>
>> Thanks,
>> --
>> Olivier
>>
>
> Trunk.
>
> Oleg
>
>
> ---------------------------------------------------------------------
> To unsubscribe, e-mail: httpclient-users-unsubscribe@hc.apache.org
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>
>
--
Olivier
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Re: Retry on ConnectTimeoutException
Posted by Oleg Kalnichevski <ol...@apache.org>.
On Thu, 2010-01-07 at 11:14 +0100, Olivier Lamy wrote:
> Hi,
> Sure, I will.
> If I want to provide a patch do I have to do it on the 4.0.x branch or trunk ?
>
> Thanks,
> --
> Olivier
>
Trunk.
Oleg
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Re: Retry on ConnectTimeoutException
Posted by Olivier Lamy <ol...@apache.org>.
Hi,
Sure, I will.
If I want to provide a patch do I have to do it on the 4.0.x branch or trunk ?
Thanks,
--
Olivier
2010/1/6 Oleg Kalnichevski <ol...@apache.org>:
> Olivier Lamy wrote:
>>
>> Sure.
>> It's just I found this more elegant/readable code using the retry
>> handler mechanism rather than writing catch/loop as with http client
>> 3.x.
>>
>
> While I agree with Ken that retrying requests on ConnectTimeoutException
> feels wrong, it is certainly incorrect that retry handler is not called.
> Feel free to open a JIRA for this issue.
>
> Oleg
>
>> --
>> Olivier
>>
>> 2010/1/6 Ken Krugler <kk...@transpac.com>:
>>>
>>> On Jan 6, 2010, at 12:49pm, Olivier Lamy wrote:
>>>
>>>> NO.
>>>> ConnectionTimeOutException can means the target endPoint cannot be
>>>> contacted.
>>>>
>>>> My software "POST" some datas to various systems : company ones and
>>>> externals one.
>>>> Sometimes some systems are on small maintenance mode or during a
>>>> restart time or some other stuffs.
>>>> What I like is to not failed directly the application and try some
>>>> retries with a sleep period between.
>>>
>>> Having long delays deep in the bowels of the request handling code feels
>>> wrong.
>>>
>>> If you need long sleep periods, then I'd wrap the entire POSTing process
>>> with a catch/retry loop, versus trying to leverage some retry support
>>> inside
>>> of HttpClient.
>>>
>>> -- Ken
>>>
>>>> With this I can give a chance to the target systems to be live before
>>>> : shutdown my application, having a kind of system alarm which will
>>>> wake some folks (including probably myself) maybe during the nigth.
>>>> All of this only because someone has restarted a server somewhere
>>>> without any notifications.
>>>>
>>>> IMHO it's a good use case :-))
>>>>
>>>> --
>>>> Olivier
>>>>
>>>> 2010/1/6 Ken Krugler <kk...@transpac.com>:
>>>>>
>>>>> From my experience, you get a ConnectTimeoutException when you've made
>>>>> a
>>>>> configuration or implementation mistake. E.g.
>>>>>
>>>>> - your connection pool size isn't big enough given the number of
>>>>> simultaneous threaded requests.
>>>>> - you're not releasing connections properly (e.g. when aborting a
>>>>> request)
>>>>>
>>>>> So having an auto-retry is kind of odd here - if you want to avoid the
>>>>> timeout, fix the root problem.
>>>>>
>>>>> -- Ken
>>>>>
>>>>>
>>>>> On Jan 6, 2010, at 12:27pm, Olivier Lamy wrote:
>>>>>
>>>>>> Thanks for reply.
>>>>>> Yes I already use this for this type of exception.
>>>>>> But this doesn't catch the ConnectionTimeOut.
>>>>>>
>>>>>> --
>>>>>> Olivier
>>>>>>
>>>>>> 2010/1/6 Khosro Asgharifard <kh...@yahoo.com>:
>>>>>>>
>>>>>>> Hi all,
>>>>>>> Olivier , Maybe i could not answer your question but i have one
>>>>>>> question
>>>>>>> .
>>>>>>> Sometimes i got the "Read timeout" or "Connection reset" or
>>>>>>> "Stream close" exceptions .
>>>>>>> and "Read timeout" exception is the most one.
>>>>>>> How do you use HttpRequestRetryHandler to handle "Read timeout"
>>>>>>> exception ?
>>>>>>> I use this code ,but again i got this "Read timeout" exception ,
>>>>>>>
>>>>>>> GetMethod httpGet = new GetMethod(url);
>>>>>>> httpGet.getParams().setParameter(HttpMethodParams.RETRY_HANDLER, new
>>>>>>> DefaultHttpMethodRetryHandler(10, true));
>>>>>>>
>>>>>>> Is there another way to handle this exception?
>>>>>>>
>>>>>>> Khosro.
>>>>>>>
>>>>>>>
>>>>>>>
>>>>>>>
>>>>>>> ________________________________
>>>>>>> From: Olivier Lamy <ol...@apache.org>
>>>>>>> To: httpclient-users@hc.apache.org
>>>>>>> Sent: Wed, January 6, 2010 10:08:21 AM
>>>>>>> Subject: Retry on ConnectTimeoutException
>>>>>>>
>>>>>>> Hi,
>>>>>>> I'm using http-client 4.0.1.
>>>>>>> Is there any way to use HttpRequestRetryHandler to handle retry on
>>>>>>> ConnectTimeoutException ? (I did it with http client 3 )
>>>>>>>
>>>>>>> Thanks,
>>>>>>> --
>>>>>>> Olivier
>>>>>>>
>>>>>>> ---------------------------------------------------------------------
>>>>>>> To unsubscribe, e-mail:
>>>>>>> mailto:httpclient-users-unsubscribe@hc.apache.org
>>>>>>> For additional commands, e-mail:
>>>>>>> mailto:httpclient-users-help@hc.apache.org
>>>>>>>
>>>>>>>
>>>>>>>
>>>>>>
>>>>>>
>>>>>> --
>>>>>> Olivier
>>>>>>
>>>>>> ---------------------------------------------------------------------
>>>>>> To unsubscribe, e-mail: httpclient-users-unsubscribe@hc.apache.org
>>>>>> For additional commands, e-mail: httpclient-users-help@hc.apache.org
>>>>>>
>>>>> --------------------------------------------
>>>>> Ken Krugler
>>>>> +1 530-210-6378
>>>>> http://bixolabs.com
>>>>> e l a s t i c w e b m i n i n g
>>>>>
>>>>>
>>>>>
>>>>>
>>>>>
>>>>> ---------------------------------------------------------------------
>>>>> To unsubscribe, e-mail: httpclient-users-unsubscribe@hc.apache.org
>>>>> For additional commands, e-mail: httpclient-users-help@hc.apache.org
>>>>>
>>>>>
>>>>
>>>>
>>>> --
>>>> Olivier
>>>>
>>>> ---------------------------------------------------------------------
>>>> To unsubscribe, e-mail: httpclient-users-unsubscribe@hc.apache.org
>>>> For additional commands, e-mail: httpclient-users-help@hc.apache.org
>>>>
>>> --------------------------------------------
>>> Ken Krugler
>>> +1 530-210-6378
>>> http://bixolabs.com
>>> e l a s t i c w e b m i n i n g
>>>
>>>
>>>
>>>
>>>
>>> ---------------------------------------------------------------------
>>> 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
>
>
--
Olivier
---------------------------------------------------------------------
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Re: Retry on ConnectTimeoutException
Posted by Oleg Kalnichevski <ol...@apache.org>.
Olivier Lamy wrote:
> Sure.
> It's just I found this more elegant/readable code using the retry
> handler mechanism rather than writing catch/loop as with http client
> 3.x.
>
While I agree with Ken that retrying requests on ConnectTimeoutException
feels wrong, it is certainly incorrect that retry handler is not called.
Feel free to open a JIRA for this issue.
Oleg
> --
> Olivier
>
> 2010/1/6 Ken Krugler <kk...@transpac.com>:
>> On Jan 6, 2010, at 12:49pm, Olivier Lamy wrote:
>>
>>> NO.
>>> ConnectionTimeOutException can means the target endPoint cannot be
>>> contacted.
>>>
>>> My software "POST" some datas to various systems : company ones and
>>> externals one.
>>> Sometimes some systems are on small maintenance mode or during a
>>> restart time or some other stuffs.
>>> What I like is to not failed directly the application and try some
>>> retries with a sleep period between.
>> Having long delays deep in the bowels of the request handling code feels
>> wrong.
>>
>> If you need long sleep periods, then I'd wrap the entire POSTing process
>> with a catch/retry loop, versus trying to leverage some retry support inside
>> of HttpClient.
>>
>> -- Ken
>>
>>> With this I can give a chance to the target systems to be live before
>>> : shutdown my application, having a kind of system alarm which will
>>> wake some folks (including probably myself) maybe during the nigth.
>>> All of this only because someone has restarted a server somewhere
>>> without any notifications.
>>>
>>> IMHO it's a good use case :-))
>>>
>>> --
>>> Olivier
>>>
>>> 2010/1/6 Ken Krugler <kk...@transpac.com>:
>>>> From my experience, you get a ConnectTimeoutException when you've made a
>>>> configuration or implementation mistake. E.g.
>>>>
>>>> - your connection pool size isn't big enough given the number of
>>>> simultaneous threaded requests.
>>>> - you're not releasing connections properly (e.g. when aborting a
>>>> request)
>>>>
>>>> So having an auto-retry is kind of odd here - if you want to avoid the
>>>> timeout, fix the root problem.
>>>>
>>>> -- Ken
>>>>
>>>>
>>>> On Jan 6, 2010, at 12:27pm, Olivier Lamy wrote:
>>>>
>>>>> Thanks for reply.
>>>>> Yes I already use this for this type of exception.
>>>>> But this doesn't catch the ConnectionTimeOut.
>>>>>
>>>>> --
>>>>> Olivier
>>>>>
>>>>> 2010/1/6 Khosro Asgharifard <kh...@yahoo.com>:
>>>>>> Hi all,
>>>>>> Olivier , Maybe i could not answer your question but i have one
>>>>>> question
>>>>>> .
>>>>>> Sometimes i got the "Read timeout" or "Connection reset" or
>>>>>> "Stream close" exceptions .
>>>>>> and "Read timeout" exception is the most one.
>>>>>> How do you use HttpRequestRetryHandler to handle "Read timeout"
>>>>>> exception ?
>>>>>> I use this code ,but again i got this "Read timeout" exception ,
>>>>>>
>>>>>> GetMethod httpGet = new GetMethod(url);
>>>>>> httpGet.getParams().setParameter(HttpMethodParams.RETRY_HANDLER, new
>>>>>> DefaultHttpMethodRetryHandler(10, true));
>>>>>>
>>>>>> Is there another way to handle this exception?
>>>>>>
>>>>>> Khosro.
>>>>>>
>>>>>>
>>>>>>
>>>>>>
>>>>>> ________________________________
>>>>>> From: Olivier Lamy <ol...@apache.org>
>>>>>> To: httpclient-users@hc.apache.org
>>>>>> Sent: Wed, January 6, 2010 10:08:21 AM
>>>>>> Subject: Retry on ConnectTimeoutException
>>>>>>
>>>>>> Hi,
>>>>>> I'm using http-client 4.0.1.
>>>>>> Is there any way to use HttpRequestRetryHandler to handle retry on
>>>>>> ConnectTimeoutException ? (I did it with http client 3 )
>>>>>>
>>>>>> Thanks,
>>>>>> --
>>>>>> Olivier
>>>>>>
>>>>>> ---------------------------------------------------------------------
>>>>>> To unsubscribe, e-mail:
>>>>>> mailto:httpclient-users-unsubscribe@hc.apache.org
>>>>>> For additional commands, e-mail:
>>>>>> mailto:httpclient-users-help@hc.apache.org
>>>>>>
>>>>>>
>>>>>>
>>>>>
>>>>>
>>>>> --
>>>>> Olivier
>>>>>
>>>>> ---------------------------------------------------------------------
>>>>> To unsubscribe, e-mail: httpclient-users-unsubscribe@hc.apache.org
>>>>> For additional commands, e-mail: httpclient-users-help@hc.apache.org
>>>>>
>>>> --------------------------------------------
>>>> Ken Krugler
>>>> +1 530-210-6378
>>>> http://bixolabs.com
>>>> e l a s t i c w e b m i n i n g
>>>>
>>>>
>>>>
>>>>
>>>>
>>>> ---------------------------------------------------------------------
>>>> To unsubscribe, e-mail: httpclient-users-unsubscribe@hc.apache.org
>>>> For additional commands, e-mail: httpclient-users-help@hc.apache.org
>>>>
>>>>
>>>
>>>
>>> --
>>> Olivier
>>>
>>> ---------------------------------------------------------------------
>>> To unsubscribe, e-mail: httpclient-users-unsubscribe@hc.apache.org
>>> For additional commands, e-mail: httpclient-users-help@hc.apache.org
>>>
>> --------------------------------------------
>> Ken Krugler
>> +1 530-210-6378
>> http://bixolabs.com
>> e l a s t i c w e b m i n i n g
>>
>>
>>
>>
>>
>> ---------------------------------------------------------------------
>> 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: Retry on ConnectTimeoutException
Posted by Olivier Lamy <ol...@apache.org>.
Sure.
It's just I found this more elegant/readable code using the retry
handler mechanism rather than writing catch/loop as with http client
3.x.
--
Olivier
2010/1/6 Ken Krugler <kk...@transpac.com>:
>
> On Jan 6, 2010, at 12:49pm, Olivier Lamy wrote:
>
>> NO.
>> ConnectionTimeOutException can means the target endPoint cannot be
>> contacted.
>>
>> My software "POST" some datas to various systems : company ones and
>> externals one.
>> Sometimes some systems are on small maintenance mode or during a
>> restart time or some other stuffs.
>> What I like is to not failed directly the application and try some
>> retries with a sleep period between.
>
> Having long delays deep in the bowels of the request handling code feels
> wrong.
>
> If you need long sleep periods, then I'd wrap the entire POSTing process
> with a catch/retry loop, versus trying to leverage some retry support inside
> of HttpClient.
>
> -- Ken
>
>> With this I can give a chance to the target systems to be live before
>> : shutdown my application, having a kind of system alarm which will
>> wake some folks (including probably myself) maybe during the nigth.
>> All of this only because someone has restarted a server somewhere
>> without any notifications.
>>
>> IMHO it's a good use case :-))
>>
>> --
>> Olivier
>>
>> 2010/1/6 Ken Krugler <kk...@transpac.com>:
>>>
>>> From my experience, you get a ConnectTimeoutException when you've made a
>>> configuration or implementation mistake. E.g.
>>>
>>> - your connection pool size isn't big enough given the number of
>>> simultaneous threaded requests.
>>> - you're not releasing connections properly (e.g. when aborting a
>>> request)
>>>
>>> So having an auto-retry is kind of odd here - if you want to avoid the
>>> timeout, fix the root problem.
>>>
>>> -- Ken
>>>
>>>
>>> On Jan 6, 2010, at 12:27pm, Olivier Lamy wrote:
>>>
>>>> Thanks for reply.
>>>> Yes I already use this for this type of exception.
>>>> But this doesn't catch the ConnectionTimeOut.
>>>>
>>>> --
>>>> Olivier
>>>>
>>>> 2010/1/6 Khosro Asgharifard <kh...@yahoo.com>:
>>>>>
>>>>> Hi all,
>>>>> Olivier , Maybe i could not answer your question but i have one
>>>>> question
>>>>> .
>>>>> Sometimes i got the "Read timeout" or "Connection reset" or
>>>>> "Stream close" exceptions .
>>>>> and "Read timeout" exception is the most one.
>>>>> How do you use HttpRequestRetryHandler to handle "Read timeout"
>>>>> exception ?
>>>>> I use this code ,but again i got this "Read timeout" exception ,
>>>>>
>>>>> GetMethod httpGet = new GetMethod(url);
>>>>> httpGet.getParams().setParameter(HttpMethodParams.RETRY_HANDLER, new
>>>>> DefaultHttpMethodRetryHandler(10, true));
>>>>>
>>>>> Is there another way to handle this exception?
>>>>>
>>>>> Khosro.
>>>>>
>>>>>
>>>>>
>>>>>
>>>>> ________________________________
>>>>> From: Olivier Lamy <ol...@apache.org>
>>>>> To: httpclient-users@hc.apache.org
>>>>> Sent: Wed, January 6, 2010 10:08:21 AM
>>>>> Subject: Retry on ConnectTimeoutException
>>>>>
>>>>> Hi,
>>>>> I'm using http-client 4.0.1.
>>>>> Is there any way to use HttpRequestRetryHandler to handle retry on
>>>>> ConnectTimeoutException ? (I did it with http client 3 )
>>>>>
>>>>> Thanks,
>>>>> --
>>>>> Olivier
>>>>>
>>>>> ---------------------------------------------------------------------
>>>>> To unsubscribe, e-mail:
>>>>> mailto:httpclient-users-unsubscribe@hc.apache.org
>>>>> For additional commands, e-mail:
>>>>> mailto:httpclient-users-help@hc.apache.org
>>>>>
>>>>>
>>>>>
>>>>
>>>>
>>>>
>>>> --
>>>> Olivier
>>>>
>>>> ---------------------------------------------------------------------
>>>> To unsubscribe, e-mail: httpclient-users-unsubscribe@hc.apache.org
>>>> For additional commands, e-mail: httpclient-users-help@hc.apache.org
>>>>
>>>
>>> --------------------------------------------
>>> Ken Krugler
>>> +1 530-210-6378
>>> http://bixolabs.com
>>> e l a s t i c w e b m i n i n g
>>>
>>>
>>>
>>>
>>>
>>> ---------------------------------------------------------------------
>>> To unsubscribe, e-mail: httpclient-users-unsubscribe@hc.apache.org
>>> For additional commands, e-mail: httpclient-users-help@hc.apache.org
>>>
>>>
>>
>>
>>
>> --
>> Olivier
>>
>> ---------------------------------------------------------------------
>> To unsubscribe, e-mail: httpclient-users-unsubscribe@hc.apache.org
>> For additional commands, e-mail: httpclient-users-help@hc.apache.org
>>
>
> --------------------------------------------
> Ken Krugler
> +1 530-210-6378
> http://bixolabs.com
> e l a s t i c w e b m i n i n g
>
>
>
>
>
> ---------------------------------------------------------------------
> To unsubscribe, e-mail: httpclient-users-unsubscribe@hc.apache.org
> For additional commands, e-mail: httpclient-users-help@hc.apache.org
>
>
--
Olivier
---------------------------------------------------------------------
To unsubscribe, e-mail: httpclient-users-unsubscribe@hc.apache.org
For additional commands, e-mail: httpclient-users-help@hc.apache.org
Re: Retry on ConnectTimeoutException
Posted by Ken Krugler <kk...@transpac.com>.
On Jan 6, 2010, at 12:49pm, Olivier Lamy wrote:
> NO.
> ConnectionTimeOutException can means the target endPoint cannot be
> contacted.
>
> My software "POST" some datas to various systems : company ones and
> externals one.
> Sometimes some systems are on small maintenance mode or during a
> restart time or some other stuffs.
> What I like is to not failed directly the application and try some
> retries with a sleep period between.
Having long delays deep in the bowels of the request handling code
feels wrong.
If you need long sleep periods, then I'd wrap the entire POSTing
process with a catch/retry loop, versus trying to leverage some retry
support inside of HttpClient.
-- Ken
> With this I can give a chance to the target systems to be live before
> : shutdown my application, having a kind of system alarm which will
> wake some folks (including probably myself) maybe during the nigth.
> All of this only because someone has restarted a server somewhere
> without any notifications.
>
> IMHO it's a good use case :-))
>
> --
> Olivier
>
> 2010/1/6 Ken Krugler <kk...@transpac.com>:
>> From my experience, you get a ConnectTimeoutException when you've
>> made a
>> configuration or implementation mistake. E.g.
>>
>> - your connection pool size isn't big enough given the number of
>> simultaneous threaded requests.
>> - you're not releasing connections properly (e.g. when aborting a
>> request)
>>
>> So having an auto-retry is kind of odd here - if you want to avoid
>> the
>> timeout, fix the root problem.
>>
>> -- Ken
>>
>>
>> On Jan 6, 2010, at 12:27pm, Olivier Lamy wrote:
>>
>>> Thanks for reply.
>>> Yes I already use this for this type of exception.
>>> But this doesn't catch the ConnectionTimeOut.
>>>
>>> --
>>> Olivier
>>>
>>> 2010/1/6 Khosro Asgharifard <kh...@yahoo.com>:
>>>>
>>>> Hi all,
>>>> Olivier , Maybe i could not answer your question but i have one
>>>> question
>>>> .
>>>> Sometimes i got the "Read timeout" or "Connection reset" or
>>>> "Stream close" exceptions .
>>>> and "Read timeout" exception is the most one.
>>>> How do you use HttpRequestRetryHandler to handle "Read timeout"
>>>> exception ?
>>>> I use this code ,but again i got this "Read timeout" exception ,
>>>>
>>>> GetMethod httpGet = new GetMethod(url);
>>>>
>>>> httpGet.getParams().setParameter(HttpMethodParams.RETRY_HANDLER,
>>>> new
>>>> DefaultHttpMethodRetryHandler(10, true));
>>>>
>>>> Is there another way to handle this exception?
>>>>
>>>> Khosro.
>>>>
>>>>
>>>>
>>>>
>>>> ________________________________
>>>> From: Olivier Lamy <ol...@apache.org>
>>>> To: httpclient-users@hc.apache.org
>>>> Sent: Wed, January 6, 2010 10:08:21 AM
>>>> Subject: Retry on ConnectTimeoutException
>>>>
>>>> Hi,
>>>> I'm using http-client 4.0.1.
>>>> Is there any way to use HttpRequestRetryHandler to handle retry on
>>>> ConnectTimeoutException ? (I did it with http client 3 )
>>>>
>>>> Thanks,
>>>> --
>>>> Olivier
>>>>
>>>> ---------------------------------------------------------------------
>>>> To unsubscribe, e-mail: mailto:httpclient-users-unsubscribe@hc.apache.org
>>>> For additional commands, e-mail:
>>>> mailto:httpclient-users-help@hc.apache.org
>>>>
>>>>
>>>>
>>>
>>>
>>>
>>> --
>>> Olivier
>>>
>>> ---------------------------------------------------------------------
>>> To unsubscribe, e-mail: httpclient-users-unsubscribe@hc.apache.org
>>> For additional commands, e-mail: httpclient-users-help@hc.apache.org
>>>
>>
>> --------------------------------------------
>> Ken Krugler
>> +1 530-210-6378
>> http://bixolabs.com
>> e l a s t i c w e b m i n i n g
>>
>>
>>
>>
>>
>> ---------------------------------------------------------------------
>> To unsubscribe, e-mail: httpclient-users-unsubscribe@hc.apache.org
>> For additional commands, e-mail: httpclient-users-help@hc.apache.org
>>
>>
>
>
>
> --
> Olivier
>
> ---------------------------------------------------------------------
> To unsubscribe, e-mail: httpclient-users-unsubscribe@hc.apache.org
> For additional commands, e-mail: httpclient-users-help@hc.apache.org
>
--------------------------------------------
Ken Krugler
+1 530-210-6378
http://bixolabs.com
e l a s t i c w e b m i n i n g
---------------------------------------------------------------------
To unsubscribe, e-mail: httpclient-users-unsubscribe@hc.apache.org
For additional commands, e-mail: httpclient-users-help@hc.apache.org
Re: Retry on ConnectTimeoutException
Posted by Olivier Lamy <ol...@apache.org>.
NO.
ConnectionTimeOutException can means the target endPoint cannot be contacted.
My software "POST" some datas to various systems : company ones and
externals one.
Sometimes some systems are on small maintenance mode or during a
restart time or some other stuffs.
What I like is to not failed directly the application and try some
retries with a sleep period between.
With this I can give a chance to the target systems to be live before
: shutdown my application, having a kind of system alarm which will
wake some folks (including probably myself) maybe during the nigth.
All of this only because someone has restarted a server somewhere
without any notifications.
IMHO it's a good use case :-))
--
Olivier
2010/1/6 Ken Krugler <kk...@transpac.com>:
> From my experience, you get a ConnectTimeoutException when you've made a
> configuration or implementation mistake. E.g.
>
> - your connection pool size isn't big enough given the number of
> simultaneous threaded requests.
> - you're not releasing connections properly (e.g. when aborting a request)
>
> So having an auto-retry is kind of odd here - if you want to avoid the
> timeout, fix the root problem.
>
> -- Ken
>
>
> On Jan 6, 2010, at 12:27pm, Olivier Lamy wrote:
>
>> Thanks for reply.
>> Yes I already use this for this type of exception.
>> But this doesn't catch the ConnectionTimeOut.
>>
>> --
>> Olivier
>>
>> 2010/1/6 Khosro Asgharifard <kh...@yahoo.com>:
>>>
>>> Hi all,
>>> Olivier , Maybe i could not answer your question but i have one question
>>> .
>>> Sometimes i got the "Read timeout" or "Connection reset" or
>>> "Stream close" exceptions .
>>> and "Read timeout" exception is the most one.
>>> How do you use HttpRequestRetryHandler to handle "Read timeout"
>>> exception ?
>>> I use this code ,but again i got this "Read timeout" exception ,
>>>
>>> GetMethod httpGet = new GetMethod(url);
>>> httpGet.getParams().setParameter(HttpMethodParams.RETRY_HANDLER, new
>>> DefaultHttpMethodRetryHandler(10, true));
>>>
>>> Is there another way to handle this exception?
>>>
>>> Khosro.
>>>
>>>
>>>
>>>
>>> ________________________________
>>> From: Olivier Lamy <ol...@apache.org>
>>> To: httpclient-users@hc.apache.org
>>> Sent: Wed, January 6, 2010 10:08:21 AM
>>> Subject: Retry on ConnectTimeoutException
>>>
>>> Hi,
>>> I'm using http-client 4.0.1.
>>> Is there any way to use HttpRequestRetryHandler to handle retry on
>>> ConnectTimeoutException ? (I did it with http client 3 )
>>>
>>> Thanks,
>>> --
>>> Olivier
>>>
>>> ---------------------------------------------------------------------
>>> To unsubscribe, e-mail: mailto:httpclient-users-unsubscribe@hc.apache.org
>>> For additional commands, e-mail:
>>> mailto:httpclient-users-help@hc.apache.org
>>>
>>>
>>>
>>
>>
>>
>> --
>> Olivier
>>
>> ---------------------------------------------------------------------
>> To unsubscribe, e-mail: httpclient-users-unsubscribe@hc.apache.org
>> For additional commands, e-mail: httpclient-users-help@hc.apache.org
>>
>
> --------------------------------------------
> Ken Krugler
> +1 530-210-6378
> http://bixolabs.com
> e l a s t i c w e b m i n i n g
>
>
>
>
>
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Olivier
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Re: Retry on ConnectTimeoutException
Posted by Ken Krugler <kk...@transpac.com>.
From my experience, you get a ConnectTimeoutException when you've
made a configuration or implementation mistake. E.g.
- your connection pool size isn't big enough given the number of
simultaneous threaded requests.
- you're not releasing connections properly (e.g. when aborting a
request)
So having an auto-retry is kind of odd here - if you want to avoid the
timeout, fix the root problem.
-- Ken
On Jan 6, 2010, at 12:27pm, Olivier Lamy wrote:
> Thanks for reply.
> Yes I already use this for this type of exception.
> But this doesn't catch the ConnectionTimeOut.
>
> --
> Olivier
>
> 2010/1/6 Khosro Asgharifard <kh...@yahoo.com>:
>> Hi all,
>> Olivier , Maybe i could not answer your question but i have one
>> question .
>> Sometimes i got the "Read timeout" or "Connection reset"
>> or "Stream close" exceptions .
>> and "Read timeout" exception is the most one.
>> How do you use HttpRequestRetryHandler to handle "Read timeout"
>> exception ?
>> I use this code ,but again i got this "Read timeout" exception ,
>>
>> GetMethod httpGet = new GetMethod(url);
>> httpGet.getParams().setParameter(HttpMethodParams.RETRY_HANDLER,
>> new DefaultHttpMethodRetryHandler(10, true));
>>
>> Is there another way to handle this exception?
>>
>> Khosro.
>>
>>
>>
>>
>> ________________________________
>> From: Olivier Lamy <ol...@apache.org>
>> To: httpclient-users@hc.apache.org
>> Sent: Wed, January 6, 2010 10:08:21 AM
>> Subject: Retry on ConnectTimeoutException
>>
>> Hi,
>> I'm using http-client 4.0.1.
>> Is there any way to use HttpRequestRetryHandler to handle retry on
>> ConnectTimeoutException ? (I did it with http client 3 )
>>
>> Thanks,
>> --
>> Olivier
>>
>> ---------------------------------------------------------------------
>> To unsubscribe, e-mail: mailto:httpclient-users-unsubscribe@hc.apache.org
>> For additional commands, e-mail: mailto:httpclient-users-help@hc.apache.org
>>
>>
>>
>
>
>
> --
> Olivier
>
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--------------------------------------------
Ken Krugler
+1 530-210-6378
http://bixolabs.com
e l a s t i c w e b m i n i n g
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Re: Retry on ConnectTimeoutException
Posted by Olivier Lamy <ol...@apache.org>.
Thanks for reply.
Yes I already use this for this type of exception.
But this doesn't catch the ConnectionTimeOut.
--
Olivier
2010/1/6 Khosro Asgharifard <kh...@yahoo.com>:
> Hi all,
> Olivier , Maybe i could not answer your question but i have one question .
> Sometimes i got the "Read timeout" or "Connection reset" or "Stream close" exceptions .
> and "Read timeout" exception is the most one.
> How do you use HttpRequestRetryHandler to handle "Read timeout" exception ?
> I use this code ,but again i got this "Read timeout" exception ,
>
> GetMethod httpGet = new GetMethod(url);
> httpGet.getParams().setParameter(HttpMethodParams.RETRY_HANDLER, new DefaultHttpMethodRetryHandler(10, true));
>
> Is there another way to handle this exception?
>
> Khosro.
>
>
>
>
> ________________________________
> From: Olivier Lamy <ol...@apache.org>
> To: httpclient-users@hc.apache.org
> Sent: Wed, January 6, 2010 10:08:21 AM
> Subject: Retry on ConnectTimeoutException
>
> Hi,
> I'm using http-client 4.0.1.
> Is there any way to use HttpRequestRetryHandler to handle retry on
> ConnectTimeoutException ? (I did it with http client 3 )
>
> Thanks,
> --
> Olivier
>
> ---------------------------------------------------------------------
> To unsubscribe, e-mail: mailto:httpclient-users-unsubscribe@hc.apache.org
> For additional commands, e-mail: mailto:httpclient-users-help@hc.apache.org
>
>
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Olivier
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Re: Retry on ConnectTimeoutException
Posted by Khosro Asgharifard <kh...@yahoo.com>.
Hi all,
Olivier , Maybe i could not answer your question but i have one question .
Sometimes i got the "Read timeout" or "Connection reset" or "Stream close" exceptions .
and "Read timeout" exception is the most one.
How do you use HttpRequestRetryHandler to handle "Read timeout" exception ?
I use this code ,but again i got this "Read timeout" exception ,
GetMethod httpGet = new GetMethod(url);
httpGet.getParams().setParameter(HttpMethodParams.RETRY_HANDLER, new DefaultHttpMethodRetryHandler(10, true));
Is there another way to handle this exception?
Khosro.
________________________________
From: Olivier Lamy <ol...@apache.org>
To: httpclient-users@hc.apache.org
Sent: Wed, January 6, 2010 10:08:21 AM
Subject: Retry on ConnectTimeoutException
Hi,
I'm using http-client 4.0.1.
Is there any way to use HttpRequestRetryHandler to handle retry on
ConnectTimeoutException ? (I did it with http client 3 )
Thanks,
--
Olivier
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