Klever

Sometimes I got the following exception:

Uncaught exception
Traceback (most recent call last):
  File "/home/debian/klever/scheduler/bin/native-scheduler", line 37, in <module>
    scheduler_impl = native.Scheduler(conf, "scheduler/")
  File "/home/debian/klever/scheduler/bin/../schedulers/native.py", line 87, in __init__
    self.init_scheduler()
  File "/home/debian/klever/scheduler/bin/../schedulers/native.py", line 128, in init_scheduler
    self.update_nodes(wc)
  File "/home/debian/klever/scheduler/bin/../schedulers/native.py", line 296, in update_nodes
    cacnel_jobs, cancel_tasks = self.__manager.update_system_status(self.__kv_url, wait_controller)
  File "/home/debian/klever/scheduler/bin/../schedulers/resource_scheduler.py", line 80, in update_system_status
    nodes, session = request(url)
  File "/home/debian/klever/scheduler/bin/../schedulers/resource_scheduler.py", line 64, in request
    format(kv_url, r.status_code, r.reason))
ValueError: Cannot get list of connected nodes requesting http://localhost:8500/v1/catalog/nodes (got status code: 500 due to: Internal Server Error)