Intermittent 500 Internal Server Error due to Premature Child Process Termination in ensure_process

[Anshuldubey0602]

I am having trouble with dash apps to respond with the Error report from ContainDS Dashboards. I get an intermittent 500 Internal server error instead. I have tried using the --ready-timeout flag hoping that it would help, but no luck. I think that the child process is getting killed before the error could propagate up.

`Traceback (most recent call last):
File "/usr/local/lib64/python3.11/site-packages/tornado/web.py", line 1713, in _execute
result = await result
^^^^^^^^^^^^
File "/usr/local/lib/python3.11/site-packages/jhsingle_native_proxy/websocket.py", line 102, in get
return await self.http_get(*args, **kwargs)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "/usr/local/lib/python3.11/site-packages/jhsingle_native_proxy/proxyhandlers.py", line 849, in http_get
return await self.proxy(self.port, path)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "/usr/local/lib/python3.11/site-packages/jhsingle_native_proxy/proxyhandlers.py", line 843, in proxy
return await self.oauth_proxy(port, path)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "/usr/local/lib/python3.11/site-packages/jhsingle_native_proxy/proxyhandlers.py", line 798, in oauth_proxy
return await self.core_proxy(port, path)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "/usr/local/lib/python3.11/site-packages/jhsingle_native_proxy/proxyhandlers.py", line 829, in core_proxy
if not await self.ensure_process():
^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "/usr/local/lib/python3.11/site-packages/jhsingle_native_proxy/proxyhandlers.py", line 762, in ensure_process
await proc.kill()
File "/usr/local/lib/python3.11/site-packages/simpervisor/process.py", line 167, in kill
return await self._signal_and_wait(signal.SIGKILL)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "/usr/local/lib/python3.11/site-packages/simpervisor/process.py", line 140, in _signal_and_wait
self.proc.send_signal(signum)
File "/usr/lib64/python3.11/asyncio/subprocess.py", line 140, in send_signal
self._transport.send_signal(signal)
File "/usr/lib64/python3.11/asyncio/base_subprocess.py", line 145, in send_signal
self._check_proc()
File "/usr/lib64/python3.11/asyncio/base_subprocess.py", line 142, in _check_proc
raise ProcessLookupError()```

Expected behavior:
The ensure_process method should capture error details, and allow the exception to propagate up for higher-level exception handling so that the error is appropriately reported instead of terminating the process prematurely, leading to generic 500 Internal Server Errors.

Expected response:

Just wanted to see if we can adjust the behavior within the if not is_ready block to let the error handled by the higher level handler? Is there any other solution we could try?