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From Natarajan_Va...@emc.com
Subject RE: stream corruption
Date Wed, 21 Jan 2009 18:44:00 GMT
we use standard ones (no customization)

org.apache.commons.httpclient.methods.PostMethod
org.apache.commons.httpclient.methods.InputStreamRequestEntity (we
buffer the serialized java object and pass ByteArrayInputStream to
InputStreamRequestEntity). 

As recommended we re-use HttpClient object and create PostMethod object
every time by passing url. Also use default params and its values.

Thanks
Valli

-----Original Message-----
From: raykroeker@gmail.com [mailto:raykroeker@gmail.com] On Behalf Of
Raymond Kroeker
Sent: Wednesday, January 21, 2009 10:32 AM
To: HttpClient User Discussion
Subject: Re: stream corruption

What about the http methods themselves.  Are you using the vanilla
versions that come with http client; are you extending them in any
way; are you using a request entity for either post/put?

Raymond

On Wed, Jan 21, 2009 at 10:20,  <Natarajan_Valli@emc.com> wrote:
> Raymond,
>
> Thanks for reply.
>
> 1. Yes & no. The problem re-occurs but things work fine when we resend
> failed request. So, there is no testcase or data that reproduce the
> problem as needed.
> 2. I tried to buffer & dump content on server side before calling
> ObjectInputStream and readObject in order to see content of malformed
> stream. Unfortunately, the problem did not occur or at least the
problem
> is delayed for hours...
>
> Additional information is, we use MultiThreadedHttpConnectionManager
on
> client side.
>
> Thanks
> Valli
>
> -----Original Message-----
> From: raykroeker@gmail.com [mailto:raykroeker@gmail.com] On Behalf Of
> Raymond Kroeker
> Sent: Wednesday, January 21, 2009 10:07 AM
> To: HttpClient User Discussion
> Subject: Re: stream corruption
>
> Hi Natarajan,
>    I've been using hc 3.0.1 for a long while and have never noticed
> this issue.  I have a couple of questions.
>
> 1.  Can you reproduce the event that causes the error?
> 2.  Can you see what the content of the malformed stream is?
>
>    If neither of these is true I would suggest that you persist the
> request content such that when the error occurs you can troubleshoot
> the problem and ask better questions.
>
> Raymond
>
> On Wed, Jan 21, 2009 at 09:02,  <Natarajan_Valli@emc.com> wrote:
>> We use HttpClient version 3.0.1 and recently noticed stream
> corruption.
>> The corruption is noticed on server side when the server (webapp
> running
>> in Jboss server) receives those requests. We believe that at some
> point
>> content of 2 requests are mixed. Is that possible? The problem is
very
>> intermittent but happens very often.
>>
>>
>>
>> Here is the code snippet that receives the stream on server side
>>
>>
>>
>>                    ObjectInputStream reqStream = new
>> ObjectInputStream(httpServletReq.getInputStream());
>>
>>                    return (IRequest) reqStream.readObject();
>>
>>
>>
>>
>>
>> exception returned by this when problem occurs
>>
>>
>>
>> java.lang.NullPointerException
>>
>>                at
>> java.io.ObjectInputStream.readSerialData(ObjectInputStream.java:1820)
>>
>>                at
>>
>
java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1719
>> )
>>
>>                at
>> java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1305)
>>
>>                at
>>
>
java.io.ObjectInputStream.defaultReadFields(ObjectInputStream.java:1908)
>>
>>                at
>> java.io.ObjectInputStream.readSerialData(ObjectInputStream.java:1832)
>>
>>                at
>>
>
java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1719
>> )
>>
>>                at
>> java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1305)
>>
>>                at
>> java.io.ObjectInputStream.readObject(ObjectInputStream.java:348)
>>
>>
>>
>> Any idea to resolve this problem is highly appreciated!
>>
>>
>>
>> Thanks
>>
>> Valli
>>
>>
>>
>>
>
>
>
> --
> ---------------------------------------------------------
> Raymond Kroeker
>
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>
>
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>



-- 
---------------------------------------------------------
Raymond Kroeker

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