Passivation/activation trouble when using proxy DB authentication

Hello,
I have an application module which uses database proxy authentication. A user authenticates with his own login/password and AppModuleImpl.java implements following methods: https://blogs.oracle.com/imc/entry/how_to_use_database_proxy .
It works fine, but there's a trouble with passivation/activation.
When passivation/activation happens, a user recieves another application module instance from server pool, which was authenticated by another user - and so an application shows another user data.
Could someone please advise me how to cope with this trouble?
Thanks.
ADF 11.1.2.1

Yes see the second comment in the blog.
"(jbo.doconnectionpooling=false and release mode=Stateful)" is not the default setting for a fusion web application... so override the prepareSession-method and set the proxyuser in this method.
Martin

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thanks for your response. As we only use myIpAddress once within our pac-File and only rely on dnsDomainIs(), ==-Comparisons and shExpMatch() and the sum of all pac-Executions was about 4 seconds compared to 40 seconds overall load time, I do not think that dns resolving is our issue.
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Passivation/activation trouble when using proxy DB authentication

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