nanaones commented on issue #18989:
URL: https://github.com/apache/airflow/issues/18989#issuecomment-1047505092


   > @nanaones @rmakoto-ze @hamedhsn @rtudo
   > 
   > Can you please provide the exact steps to reproduce the problem you have? 
What exactly you do, what logs and behaviours you see? I would like to take a 
close look at that but I need a little bit more information to start looking at 
it.
   
   ENV:
   
   Airflow on EKS  1.21
   Helm 1.3.0
   Airflow 2.2.3
   
   This is the screen seen from the [Lens](https://github.com/lensapp/lens). 
It's constantly restarting.   
   I have no problems using it now, but I think it could be a problem.
   
   
![image](https://user-images.githubusercontent.com/42568844/155084023-816e0bc1-3d34-4594-a7b1-05543d35f5c6.png)
   
   Airflow scheduler keeps restarting with the following error:
   
   
   ```shell
   
   [2022-02-22 01:34:22,995] {process_utils.py:70} INFO - Process 
psutil.Process(pid=2304, status='terminated', started='01:34:21') (2304) 
terminated with exit code None
   [2022-02-22 01:34:22,995] {process_utils.py:70} INFO - Process 
psutil.Process(pid=35, status='terminated', exitcode=0, started='01:23:31') 
(35) terminated with exit code 0
   [2022-02-22 01:34:22,995] {kubernetes_executor.py:790} INFO - Shutting down 
Kubernetes executor
   [2022-02-22 01:34:22,996] {scheduler_job.py:650} ERROR - Exception when 
executing Executor.end
   Traceback (most recent call last):
     File 
"/home/airflow/.local/lib/python3.7/site-packages/airflow/jobs/scheduler_job.py",
 line 628, in _execute
       self._run_scheduler_loop()
     File 
"/home/airflow/.local/lib/python3.7/site-packages/airflow/jobs/scheduler_job.py",
 line 730, in _run_scheduler_loop
       time.sleep(min(self._scheduler_idle_sleep_time, next_event))
     File 
"/home/airflow/.local/lib/python3.7/site-packages/airflow/jobs/scheduler_job.py",
 line 164, in _exit_gracefully
       sys.exit(os.EX_OK)
   SystemExit: 0
   
   During handling of the above exception, another exception occurred:
   
   Traceback (most recent call last):
     File 
"/home/airflow/.local/lib/python3.7/site-packages/airflow/jobs/scheduler_job.py",
 line 648, in _execute
       self.executor.end()
     File 
"/home/airflow/.local/lib/python3.7/site-packages/airflow/executors/kubernetes_executor.py",
 line 792, in end
       self._flush_task_queue()
     File 
"/home/airflow/.local/lib/python3.7/site-packages/airflow/executors/kubernetes_executor.py",
 line 745, in _flush_task_queue
       self.log.debug('Executor shutting down, task_queue approximate size=%d', 
self.task_queue.qsize())
     File "<string>", line 2, in qsize
     File "/usr/local/lib/python3.7/multiprocessing/managers.py", line 818, in 
_callmethod
       conn.send((self._id, methodname, args, kwds))
     File "/usr/local/lib/python3.7/multiprocessing/connection.py", line 206, 
in send
       self._send_bytes(_ForkingPickler.dumps(obj))
     File "/usr/local/lib/python3.7/multiprocessing/connection.py", line 404, 
in _send_bytes
       self._send(header + buf)
     File "/usr/local/lib/python3.7/multiprocessing/connection.py", line 368, 
in _send
       n = write(self._handle, buf)
   BrokenPipeError: [Errno 32] Broken pipe
   [2022-02-22 01:34:22,997] {process_utils.py:124} INFO - Sending 
Signals.SIGTERM to group 35. PIDs of all processes in the group: []
   [2022-02-22 01:34:22,997] {process_utils.py:75} INFO - Sending the signal 
Signals.SIGTERM to group 35
   [2022-02-22 01:34:22,998] {process_utils.py:90} INFO - Sending the signal 
Signals.SIGTERM to process 35 as process group is missing.
   [2022-02-22 01:34:22,998] {scheduler_job.py:655} INFO - Exited execute loop
   
     ____________       _____________
    ____    |__( )_________  __/__  /________      __
   ____  /| |_  /__  ___/_  /_ __  /_  __ \_ | /| / /
   ___  ___ |  / _  /   _  __/ _  / / /_/ /_ |/ |/ /
    _/_/  |_/_/  /_/    /_/    /_/  \____/____/|__/
   [2022-02-22 01:34:30,903] {scheduler_job.py:596} INFO - Starting the 
scheduler
   
   ```
   


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