callback event serial

src/core/callcenter/callback.py

@@ -81,5 +81,5 @@ class Callback(object):
             random_index = abs(mmh3.hash(random_id)) % len(self.executors)
         else:
             random_index = random.randint(0, len(self.executors) - 1) if self.executors else 0
-        self.logger.info('choose_thread_pool_executor.index=', random_index, call_id, device_id, wdh_device_id)
+        self.logger.info('choose_thread_pool_executor.index %s %s %s %s', random_index, call_id, device_id, wdh_device_id)
         return self.executors.get(random_index)