Multiple CakePHP running on the same machine are mixing up their classes

I have multiple cake applications (v2.0) running behind a prefock apache(2.2.17) on my developer machine (php 5.3). Each one is on a different virtual host (port 81 and 82). The applications may interact with each other via HTTP requests. Before using LAMPP, i didn't get any issue. For practical reason i switch to standalone apache & mysql.

Since i switch to standalone install, the 2 applications are messing their classes. For example the http request to the first application (vusion-frontend) are handle by the correct webroot/index.php but then the classes loaded are sometimes the one from the other application (vusion-datatools). See below the error stack trace for more details, it starts with in the correct path /home/oliv/Development/vusion-frontend, then get a Dispatcher class is loaded from /home/oliv/Development/vusion-datatools (the second application) then get the ProgramController class from /home/oliv/Development/vusion-frontend, finally it goes back to load the class from /home/oliv/Development/vusion-datatools. 

The issue arise when doing alternative request on each site. 

#0 /home/oliv/Development/vusion-datatools/lib/Cake/Model/Datasource/DboSource.php(436): PDOStatement->execute(Array)  #1 /home/oliv/Development/vusion-datatools/lib/Cake/Model/Datasource/DboSource.php(403): DboSource->_execute('SELECT `Group`....', Array)  #2 /home/oliv/Development/vusion-datatools/lib/Cake/Model/Datasource/DboSource.php(647): DboSource->execute('SELECT `Group`....', Array, Array)  #3 /home/oliv/Development/vusion-datatools/lib/Cake/Model/Datasource/DboSource.php(1040): DboSource->fetchAll('SELECT `Group`....', false)  #4 /home/oliv/Development/vusion-datatools/lib/Cake/Model/Model.php(2484): DboSource->read(Object(Group), Array)  #5 /home/oliv/Development/vusion-datatools/lib/Cake/Model/Datasource/DboSource.php(575): Model->find('first', Array)  #6 /home/oliv/Development/vusion-datatools/lib/Cake/Model/Model.php(720): DboSource->query('findById', Array, Object(Group))  #7 /home/oliv/Development/vusion-datatools/app/Model/Group.php(45): Model->__call('findById', Array)  #8 /home/oliv/Development/vusion-datatools/app/Model/Group.php(45): Group->findById('1')  #9 /home/oliv/Development/vusion-datatools/app/Controller/AppController.php(97): Group->hasSpecificJobAccess('1')  #10 /home/oliv/Development/vusion-frontend/app/Controller/ProgramsController.php(42): AppController->beforeFilter()  #11 /home/oliv/Development/vusion-datatools/lib/Cake/Controller/Controller.php(605): ProgramsController->beforeFilter()  #12 /home/oliv/Development/vusion-datatools/lib/Cake/Routing/Dispatcher.php(101): Controller->startupProcess()  #13 /home/oliv/Development/vusion-datatools/lib/Cake/Routing/Dispatcher.php(86): Dispatcher->_invoke(Object(ProgramsController), Object(CakeRequest), Object(CakeResponse))  #14 /home/oliv/Development/vusion-frontend/app/webroot/index.php(96): Dispatcher->dispatch(Object(CakeRequest), Object(CakeResponse))  #15 {main}

I really don't have a clue where this is coming from... Shouldn't apache make sure that php is not messing up. Is it a preloaded apache client of one application that try to serve another application?? still i don't get how one application could call a class from another part of the file system.

Olivier

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