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Problem with session data

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We are using WebSphere 4.0.2 on AIX. Our application is very session intensive. The back end used is CICS with CTG 3.1 as the transaction gateway. Our application involves getting request parameters from a user login page and passing this information to CICS to retrieve information specific to that user. All the information is then stored in a session and displayed to the user.
However, in some cases the response received does not match the information requested for i.e. information retrieved is that of a different user, though the request parameters passed to CICS are correct.
We are using VAJ 4.0 to generate the java classes used to interact with CICS. We use ECI to communicate with CICS progs. As far as I know, the mode of communication with the CTG is Synchronous ( We are using default settings -Interaction Verb=1 - specified in VAJ). However, is it possible that the responses are being treated as generic asynchronous because of which the application receives whichever response is queued on the CTG? If so how can this be solved? Is some configuration required for the CTG to ensure Synchronous responses?
Also, the mixup with responses seems to occur most frequently at times when the CICS regions were down/CTG was throwing errors and there were simultaneous requests made. If anybody had encountered similar problems and can help out, it would be great.
[ July 09, 2002: Message edited by: Madhumita Banerjee ]
[ July 09, 2002: Message edited by: Madhumita Banerjee ]
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