Magento “Front controller reached 100 router match iterations” error

Question

My site is going down once or twice a day when it starts throwing the exception \"Front controller reached 100 router match iterations\". Once this happens access to the adm

Answer 1

The error message is too general to try to solve this problem. I suggest you to hire some freelancer Magento web-developer to look to the source of the problem on your actual site. It cannot be solved theoretically.

As seen from the message, the problem occurs because your routers are making circular references for dispatching requests. One of them matches request, but doesn't dispatch and pushes it to redispatch again. Or no router matches request at all.

You can get more information by going to Magento Core file app/code/core/Mage/Core/Controller/Varien/Front.php, find there lines

while (!$request->isDispatched() && $i++<100) {
    foreach ($this->_routers as $router) {
        if ($router->match($this->getRequest())) {
            break;
        }
    }
}

and replace them with

Mage::log('----Matching routers------------------------------');
Mage::log('Total ' . count($this->_routers) . ': ' . implode(', ', array_keys($this->_routers)));
while (!$request->isDispatched() && $i++<100) {
    Mage::log('- Iteration ' . $i);
    $requestData = array(
        'path_info' => $request->getPathInfo(),
        'module' => $request->getModuleName(),
        'action' => $request->getActionName(),
        'controller' => $request->getControllerName(),
        'controller_module' => $request->getControllerModule(),
        'route' => $request->getRouteName()
    );

    $st = '';
    foreach ($requestData as $key => $val) {
        $st .= "[{$key}={$val}]";
    }
    Mage::log('Request: ' . $st);
    foreach ($this->_routers as $name => $router) {
        if ($router->match($this->getRequest())) {
            Mage::log('Matched by "' . $name . '" router, class ' . get_class($router));
            break;
        }
    }
}

After that wait for site to produce the error, open var/log/system.log and see there debugging information about what is going on inside your system. It will help to see much more better, what router breaks the system.