Python SDK for Vmware get stuck in openSSL SSL_read

Question

I am using [Python SDK][1] for VMware automation tasks e.g. power off, power on and delete VMs in vcenter server.

from com.vmware.vcenter.vm_client import Power
from samples.vsphere.vcenter.helper.vm_helper import get_vm
import requests
import urllib3
from vmware.vapi.vsphere.client import create_vsphere_client
import argparse

Inputs = fetch_inputs()
    vm_name = Inputs.VM_Name
    action = Inputs.action
    session = requests.session()

    # Disable cert verification for demo purpose.
    # This is not recommended in a production environment.
    session.verify = False

    # Disable the secure connection warning for demo purpose.
    # This is not recommended in a production environment.
    urllib3.disable_warnings(urllib3.exceptions.InsecureRequestWarning)

    # Connect to a vCenter Server using username and password
    vsphere_client = create_vsphere_client(server=Inputs.server, username=Inputs.username, password=Inputs.password, session=session)

vsphere_client.vcenter.vm.Power.stop(vm) <<--- It gets stuck here.

However, it does the operation but after that it gets stuck there and never comes out. If I do CTRL+C, then I can see that it seemd to get stuck in SSL_read in OpenSSL library:

^CTraceback (most recent call last):
  File "/home/qa1/python_sdk_scripts/manage_vm.py", line 97, in <module>
    power_on(vsphere_client, vm_name)
  File "/home/qa1/python_sdk_scripts/manage_vm.py", line 40, in power_on
    return_value = vsphere_client.vcenter.vm.Power.start(vm)
  File "/home/qa1/.local/lib/python3.8/site-packages/com/vmware/vcenter/vm_client.py", line 2141, in start
    return self._invoke('start',
  File "/home/qa1/.local/lib/python3.8/site-packages/vmware/vapi/bindings/stub.py", line 345, in _invoke
    return self._api_interface.native_invoke(ctx, _method_name, kwargs)
  File "/home/qa1/.local/lib/python3.8/site-packages/vmware/vapi/bindings/stub.py", line 266, in native_invoke
    method_result = self.invoke(ctx, method_id, data_val)
  File "/home/qa1/.local/lib/python3.8/site-packages/vmware/vapi/bindings/stub.py", line 199, in invoke
    return self._api_provider.invoke(self._iface_id.get_name(),
  File "/home/qa1/.local/lib/python3.8/site-packages/vmware/vapi/security/client/security_context_filter.py", line 101, in invoke
    method_result = ApiProviderFilter.invoke(
  File "/home/qa1/.local/lib/python3.8/site-packages/vmware/vapi/provider/filter.py", line 75, in invoke
    method_result = self.next_provider.invoke(
  File "/home/qa1/.local/lib/python3.8/site-packages/vmware/vapi/protocol/client/msg/json_connector.py", line 79, in invoke
    response = self._do_request(VAPI_INVOKE, ctx, params)
  File "/home/qa1/.local/lib/python3.8/site-packages/vmware/vapi/protocol/client/msg/json_connector.py", line 120, in _do_request
    http_response = self.http_provider.do_request(
  File "/home/qa1/.local/lib/python3.8/site-packages/vmware/vapi/protocol/client/rpc/requests_provider.py", line 95, in do_request
    output = self._session.request(
  File "/usr/lib/python3/dist-packages/requests/sessions.py", line 533, in request
    resp = self.send(prep, **send_kwargs)
  File "/usr/lib/python3/dist-packages/requests/sessions.py", line 646, in send
    r = adapter.send(request, **kwargs)
  File "/usr/lib/python3/dist-packages/requests/adapters.py", line 439, in send
    resp = conn.urlopen(
  File "/usr/lib/python3/dist-packages/urllib3/connectionpool.py", line 665, in urlopen
    httplib_response = self._make_request(
  File "/usr/lib/python3/dist-packages/urllib3/connectionpool.py", line 421, in _make_request
    six.raise_from(e, None)
  File "<string>", line 3, in raise_from
  File "/usr/lib/python3/dist-packages/urllib3/connectionpool.py", line 416, in _make_request
    httplib_response = conn.getresponse()
  File "/usr/lib/python3.8/http/client.py", line 1348, in getresponse
    response.begin()
  File "/usr/lib/python3.8/http/client.py", line 316, in begin
    version, status, reason = self._read_status()
  File "/usr/lib/python3.8/http/client.py", line 277, in _read_status
    line = str(self.fp.readline(_MAXLINE + 1), "iso-8859-1")
  File "/usr/lib/python3.8/socket.py", line 669, in readinto
    return self._sock.recv_into(b)
  File "/usr/lib/python3/dist-packages/urllib3/contrib/pyopenssl.py", line 313, in recv_into
    return self.connection.recv_into(*args, **kwargs)
  File "/home/qa1/.local/lib/python3.8/site-packages/OpenSSL/SSL.py", line 1733, in recv_into
    result = _lib.SSL_read(self._ssl, buf, nbytes)
KeyboardInterrupt

How can I debug this, where is the issue?

  [1]: https://github.com/vmware/vsphere-automation-sdk-python