[jacorb-developer] TAO 1.7 Compatibility Issue

[Johnny Willemsen]

Hi,

Try to run the TAO side with -ORBDebugLevel 10 to see what it outputs.

Johnny

On 06/21/2012 11:15 AM, Vasya Tretyakov wrote:
> Hi Nick,
>
> Thank you for the reply.
>
> Unfortunately the developer of the TAO-based CORBA server component doe not provide the source code for the application, hence I cannot undate the implementation to the up-to-date release of TAO.
>
> Do you have any idea whether the extra byte in the parameter list section of the GIOP Request packet could be the possible cause of the exception I am getting?
>
> Regards,
> Vasyl
>
> ________________________________
>   From: Nick Cross <jacorb at goots.org>
> To: Vasya Tretyakov <vasyamn at yahoo.com>; Discussions concerning CORBA development with JacORB <jacorb-developer at lists.spline.inf.fu-berlin.de>
> Sent: Wednesday, June 20, 2012 2:56 PM
> Subject: Re: [jacorb-developer] TAO 1.7 Compatibility Issue
>
>
> Hi,
>
> JacORB has been tested for interoperability with TAO.
>
> TAO 1.7 is I think 3 years old now - the current version is ACE 6.x and
> TAO 2.x (http://download.dre.vanderbilt.edu/).
>
> Could you retest with the current versions of TAO and JacORB ?
>
> Regards
>
> Nick
>
>
>
> On 20/06/12 11:12, Vasya Tretyakov wrote:
>> Dear Members,
>>
>> I have a need to write an application that communicates with another
>> process on a different server. The developers of the software I would
>> like to connect to provide an IDL file to facilitate programming
>> language and server independent communication between the interacting
>> applications. The ORB of the server side is implemented in C++ using
>> The ACE ORB (TAO) version 1.7 (as the folder name on the server
>> suggests). I also have several binary pre-compiled sample client
>> applications that successfully communicate with the server and the
>> corresponding C++ source code.
>>
>> After facing many problems with the ORB implementation provided by
>> Oracle in JDK, I came across your wonderful project.
>>
>> At this time I managed to connect to the server's Naming Service,
>> receive IOR to the desired object and sucessfully execute a void
>> method on it. However when I try calling the method that requires
>> parameters I get an OperationFailed exception.
>>
>> Investigation of the possible problem causes lead me to WireShark
>> sniffer, which I used to capture GIOP packets. Here is what I can
>> conlude by comparing the packets sent/received during the sample C++
>> TAO based client applicaton and my Java JacORB based application: 1)
>> GIOP requests from Java client application have big-endian byte
>> order, while C++ client application uses little-endian byte order. 2)
>> Replies to Java and C++ client applications have little-endian byte
>> order (actually, this was a problem when using JDK's ORB since it
>> could not parse the replies while JacORB does the job). 3) GIOP
>> requests Java and C++ applications have a lot in common (there are
>> some minor differences), expect for the parameter list of the called
>> method. C++ client application contains the name of the method, four
>> zero bytes, and parameter list while Java client contains the name of
>> the method, four zero bytes, and parameter list with a preceeding
>> zero byte.
>>
>> I conlude that I am facing the following problems: 1) Incorrect byte
>> order in reply messages (though JacORB manages to cope with it). 2)
>> An extra zero byte in the parameter list in the Java JacORB based
>> client implementation.
>>
>> Since I am quite unexperience with CORBA I would really appreciate
>> your advice on whether the extra zero byte in the parameter list is
>> indeed the cuase of the exception being raised by the server. If so,
>> what is the best place to start looking at in order to fix the
>> problem.
>>
>> Thank you in advance.
>>
>> Vasyl _______________________________________________
>> jacorb-developer maillist  -
>> jacorb-developer at lists.spline.inf.fu-berlin.de
>> https://lists.spline.inf.fu-berlin.de/mailman/listinfo/jacorb-developer
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