concurrently running instances of chromium are fucking each other up

server-web.py

@@ -91,7 +91,7 @@ def ids():
     l = filter(idIsRecent,list(valuestore.keys()))
     return ','.join(map(str,list(l)))
 
-def createDriver():
+def createDriver(id):
     options = webdriver.ChromeOptions()
     options.add_argument('--headless')
     options.add_argument("--incognito")
@@ -101,7 +101,15 @@ def createDriver():
     options.add_argument("--no-sandbox")
     options.add_argument("--enable-javascript")
     options.add_argument('--disable-dev-shm-usage')
+    data_dir = "--user-data-dir=/tmp/" + str(id)
+    options.add_argument(data_dir)
+    
+    try:
         driver = webdriver.Chrome(options=options)
+    except selenium.common.exceptions.SessionNotCreatedException:
+        sleep(10)
+        driver = createDriver(id)
+        return driver
     driver.response_interceptor = interceptor
     return driver
 
@@ -115,7 +123,7 @@ if __name__ == '__main__':
     restartWait = timedelta(hours=4)
 
     # setup webdriver
-    d0 = createDriver()
+    d0 = createDriver(0)
 
     # start initial driver
     d0.get('https://dus-travis.dus.com/')
@@ -125,14 +133,14 @@ if __name__ == '__main__':
     while True:
         sleep(30)
         if datetime.now(timezone.utc) > lastaccess + restartWait:
-            d1 = createDriver()
+            d1 = createDriver(1)
             d1.get('https://dus-travis.dus.com/')
             print ("New Failover Driver started, waiting 10 seconds ...")
             sleep(10)
             killChildren(d0)
             del d0
             print ("Original driver deleted")
-            d0 = createDriver()
+            d0 = createDriver(0)
             d0.get('https://dus-travis.dus.com/')
             print ("Recreating original driver and waiting 10 seconds ...")
             sleep(10)