Introduced RetryChoiceListFactory to deal with parallelism issues (#91)…

… (#92)

* Introduced RetryChoiceListFactory to deal with parallelism issues

* Fixes

* Fixes2

* Added exponential retry

src/bundle/Subscriber/StartScenarioSubscriber.php

@@ -14,6 +14,8 @@
 use Facebook\WebDriver\Exception\UnknownErrorException;
 use Symfony\Component\EventDispatcher\EventSubscriberInterface;
 use Symfony\Component\HttpKernel\KernelInterface;
+use Symfony\Component\Lock\LockFactory;
+use Symfony\Component\Lock\Store\FlockStore;
 
 class StartScenarioSubscriber implements EventSubscriberInterface
 {
@@ -50,7 +52,20 @@ public function resizeWindow(BeforeScenarioTested $event): void
 
         $session = $this->kernel->getContainer()->get('behat.mink.default_session');
         if (!$session->isStarted()) {
-            $session->start();
+
+            $store = new FlockStore(sys_get_temp_dir());
+            $factory = new LockFactory($store);
+
+            $lock = $factory->createLock('session-start');
+
+            if ($lock->acquire(true)) {
+                try {
+                    $session->start();
+                }
+                finally {
+                    $lock->release();
+                }
+            }
         }
 
         $this->executeWithRetry(function () use ($session): void {