After running dockerized unittests some celery tasks remain unprocessed that lead to errors in subsequent run of celery

[dmugtasimov]

After running dockerized unittests some celery tasks remain unprocessed that lead to errors in subsequent run of celery:

[2021-02-27 12:46:31,767: INFO/MainProcess] Received task: thenewboston_bank.tasks.blocks.send_signed_block[5c1d7a70-3715-4fb8-988a-9360d3efaa2c]  
[2021-02-27 12:46:31,768: DEBUG/MainProcess] TaskPool: Apply <function _fast_trace_task at 0x7f64f4374280> (args:('thenewboston_bank.tasks.blocks.send_signed_block', '5c1d7a70-3715-4fb8-988a-9360d3efaa2c', {'lang': 'py', 'task': 'thenewboston_bank.tasks.blocks.send_signed_block', 'id': '5c1d7a70-3715-4fb8-988a-9360d3efaa2c', 'shadow': None, 'eta': None, 'expires': None, 'group': None, 'group_index': None, 'retries': 0, 'timelimit': [None, None], 'root_id': '5c1d7a70-3715-4fb8-988a-9360d3efaa2c', 'parent_id': None, 'argsrepr': '()', 'kwargsrepr': "{'block': {'account_number': '03bee52becfde71aa0c4373d3a80eba488edd15714abd9eb3e6239ab99cae4aa', 'message': {'balance_key': '03bee52becfde71aa0c4373d3a80eba488edd15714abd9eb3e6239ab99cae4aa', 'txs': [...]}, 'signature': '829e77e0bce6c6135ad118cfc9d9c39a5739201164c1fa9ad4905922cf55daa4e38ee1ad15aa15ded03f3eb57ecebaf286606029fd208ca56a36df40476fb00a'}, 'ip_address': '192.168.1.74', 'port': 8000, 'protocol': 'http', 'url_path': '/bank_blocks'}", 'origin': 'gen17@bb70df0745f1', 'reply_to': 'c00a13f9-c3e6-3c26-81ae-915bd29b16de', 'correlation_id':... kwargs:{})
[2021-02-27 12:46:31,770: INFO/MainProcess] Received task: thenewboston_bank.tasks.sync.set_primary_validator[fd539fa1-7699-4cec-b133-3b4c281b13af]  
[2021-02-27 12:46:31,771: DEBUG/MainProcess] Task accepted: thenewboston_bank.tasks.blocks.send_signed_block[5c1d7a70-3715-4fb8-988a-9360d3efaa2c] pid:15629
[2021-02-27 12:46:31,774: INFO/MainProcess] Received task: thenewboston_bank.tasks.sync.set_primary_validator[4d8e6bf5-6919-4882-9830-54d5cd478382]  
[2021-02-27 12:46:31,776: DEBUG/ForkPoolWorker-1] Starting new HTTP connection (1): 192.168.1.74:8000
[2021-02-27 12:46:34,825: INFO/MainProcess] Received task: thenewboston_bank.tasks.sync.set_primary_validator[c93ce199-8325-45bb-985f-bb63a3347572]  
[2021-02-27 12:46:34,823: ERROR/ForkPoolWorker-1] HTTPConnectionPool(host='192.168.1.74', port=8000): Max retries exceeded with url: /bank_blocks (Caused by NewConnectionError('<urllib3.connection.HTTPConnection object at 0x7f64ec54d520>: Failed to establish a new connection: [Errno 113] No route to host'))
Traceback (most recent call last):
  File "/home/dmugtasimov/.virtualenvs/thenewboston-bank-r7f_GShq-py3.9/lib/python3.9/site-packages/urllib3/connection.py", line 169, in _new_conn
    conn = connection.create_connection(
  File "/home/dmugtasimov/.virtualenvs/thenewboston-bank-r7f_GShq-py3.9/lib/python3.9/site-packages/urllib3/util/connection.py", line 96, in create_connection
    raise err
  File "/home/dmugtasimov/.virtualenvs/thenewboston-bank-r7f_GShq-py3.9/lib/python3.9/site-packages/urllib3/util/connection.py", line 86, in create_connection
    sock.connect(sa)
OSError: [Errno 113] No route to host

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "/home/dmugtasimov/.virtualenvs/thenewboston-bank-r7f_GShq-py3.9/lib/python3.9/site-packages/urllib3/connectionpool.py", line 699, in urlopen
    httplib_response = self._make_request(
  File "/home/dmugtasimov/.virtualenvs/thenewboston-bank-r7f_GShq-py3.9/lib/python3.9/site-packages/urllib3/connectionpool.py", line 394, in _make_request
    conn.request(method, url, **httplib_request_kw)
  File "/home/dmugtasimov/.virtualenvs/thenewboston-bank-r7f_GShq-py3.9/lib/python3.9/site-packages/urllib3/connection.py", line 234, in request
    super(HTTPConnection, self).request(method, url, body=body, headers=headers)
  File "/home/dmugtasimov/.pyenv/versions/3.9.2/lib/python3.9/http/client.py", line 1255, in request
    self._send_request(method, url, body, headers, encode_chunked)
  File "/home/dmugtasimov/.pyenv/versions/3.9.2/lib/python3.9/http/client.py", line 1301, in _send_request
    self.endheaders(body, encode_chunked=encode_chunked)
  File "/home/dmugtasimov/.pyenv/versions/3.9.2/lib/python3.9/http/client.py", line 1250, in endheaders
    self._send_output(message_body, encode_chunked=encode_chunked)
  File "/home/dmugtasimov/.pyenv/versions/3.9.2/lib/python3.9/http/client.py", line 1010, in _send_output
    self.send(msg)
  File "/home/dmugtasimov/.pyenv/versions/3.9.2/lib/python3.9/http/client.py", line 950, in send
    self.connect()
  File "/home/dmugtasimov/.virtualenvs/thenewboston-bank-r7f_GShq-py3.9/lib/python3.9/site-packages/urllib3/connection.py", line 200, in connect
    conn = self._new_conn()
  File "/home/dmugtasimov/.virtualenvs/thenewboston-bank-r7f_GShq-py3.9/lib/python3.9/site-packages/urllib3/connection.py", line 181, in _new_conn
    raise NewConnectionError(
urllib3.exceptions.NewConnectionError: <urllib3.connection.HTTPConnection object at 0x7f64ec54d520>: Failed to establish a new connection: [Errno 113] No route to host

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "/home/dmugtasimov/.virtualenvs/thenewboston-bank-r7f_GShq-py3.9/lib/python3.9/site-packages/requests/adapters.py", line 439, in send
    resp = conn.urlopen(
  File "/home/dmugtasimov/.virtualenvs/thenewboston-bank-r7f_GShq-py3.9/lib/python3.9/site-packages/urllib3/connectionpool.py", line 755, in urlopen
    retries = retries.increment(
  File "/home/dmugtasimov/.virtualenvs/thenewboston-bank-r7f_GShq-py3.9/lib/python3.9/site-packages/urllib3/util/retry.py", line 573, in increment
    raise MaxRetryError(_pool, url, error or ResponseError(cause))
urllib3.exceptions.MaxRetryError: HTTPConnectionPool(host='192.168.1.74', port=8000): Max retries exceeded with url: /bank_blocks (Caused by NewConnectionError('<urllib3.connection.HTTPConnection object at 0x7f64ec54d520>: Failed to establish a new connection: [Errno 113] No route to host'))

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "/home/dmugtasimov/gitrep/thenewboston/Bank/thenewboston_bank/tasks/blocks.py", line 47, in send_signed_block
    post(url=url, body=signed_block)
  File "/home/dmugtasimov/.virtualenvs/thenewboston-bank-r7f_GShq-py3.9/lib/python3.9/site-packages/thenewboston/utils/network.py", line 20, in post
    response = requests.post(url, json=body)
  File "/home/dmugtasimov/.virtualenvs/thenewboston-bank-r7f_GShq-py3.9/lib/python3.9/site-packages/requests/api.py", line 119, in post
    return request('post', url, data=data, json=json, **kwargs)
  File "/home/dmugtasimov/.virtualenvs/thenewboston-bank-r7f_GShq-py3.9/lib/python3.9/site-packages/requests/api.py", line 61, in request
    return session.request(method=method, url=url, **kwargs)
  File "/home/dmugtasimov/.virtualenvs/thenewboston-bank-r7f_GShq-py3.9/lib/python3.9/site-packages/requests/sessions.py", line 542, in request
    resp = self.send(prep, **send_kwargs)
  File "/home/dmugtasimov/.virtualenvs/thenewboston-bank-r7f_GShq-py3.9/lib/python3.9/site-packages/requests/sessions.py", line 655, in send
    r = adapter.send(request, **kwargs)
  File "/home/dmugtasimov/.virtualenvs/thenewboston-bank-r7f_GShq-py3.9/lib/python3.9/site-packages/requests/adapters.py", line 516, in send
    raise ConnectionError(e, request=request)
requests.exceptions.ConnectionError: HTTPConnectionPool(host='192.168.1.74', port=8000): Max retries exceeded with url: /bank_blocks (Caused by NewConnectionError('<urllib3.connection.HTTPConnection object at 0x7f64ec54d520>: Failed to establish a new connection: [Errno 113] No route to host'))
[2021-02-27 12:46:34,829: INFO/ForkPoolWorker-1] Task thenewboston_bank.tasks.blocks.send_signed_block[5c1d7a70-3715-4fb8-988a-9360d3efaa2c] succeeded in 3.0597239730000183s: None
[2021-02-27 12:46:34,829: DEBUG/MainProcess] TaskPool: Apply <function _fast_trace_task at 0x7f64f4374280> (args:('thenewboston_bank.tasks.sync.set_primary_validator', 'fd539fa1-7699-4cec-b133-3b4c281b13af', {'lang': 'py', 'task': 'thenewboston_bank.tasks.sync.set_primary_validator', 'id': 'fd539fa1-7699-4cec-b133-3b4c281b13af', 'shadow': None, 'eta': None, 'expires': None, 'group': None, 'group_index': None, 'retries': 0, 'timelimit': [None, None], 'root_id': 'fd539fa1-7699-4cec-b133-3b4c281b13af', 'parent_id': None, 'argsrepr': '()', 'kwargsrepr': '{}', 'origin': 'gen8@bb70df0745f1', 'reply_to': '2b1788a2-bad6-34ad-b975-8c60de7293cd', 'correlation_id': 'fd539fa1-7699-4cec-b133-3b4c281b13af', 'hostname': 'celery@dmugtasimov-Latitude-E5550', 'delivery_info': {'exchange': '', 'routing_key': 'celery', 'priority': 0, 'redelivered': None}, 'args': [], 'kwargs': {}}, b'[[], {}, {"callbacks": null, "errbacks": null, "chain": null, "chord": null}]', 'application/json', 'utf-8') kwargs:{})
[2021-02-27 12:46:34,830: DEBUG/MainProcess] Task accepted: thenewboston_bank.tasks.sync.set_primary_validator[fd539fa1-7699-4cec-b133-3b4c281b13af] pid:15629
[2021-02-27 12:46:34,846: INFO/ForkPoolWorker-1] Task thenewboston_bank.tasks.sync.set_primary_validator[fd539fa1-7699-4cec-b133-3b4c281b13af] succeeded in 0.01564732399992863s: None
[2021-02-27 12:46:34,847: DEBUG/MainProcess] TaskPool: Apply <function _fast_trace_task at 0x7f64f4374280> (args:('thenewboston_bank.tasks.sync.set_primary_validator', '4d8e6bf5-6919-4882-9830-54d5cd478382', {'lang': 'py', 'task': 'thenewboston_bank.tasks.sync.set_primary_validator', 'id': '4d8e6bf5-6919-4882-9830-54d5cd478382', 'shadow': None, 'eta': None, 'expires': None, 'group': None, 'group_index': None, 'retries': 0, 'timelimit': [None, None], 'root_id': '4d8e6bf5-6919-4882-9830-54d5cd478382', 'parent_id': None, 'argsrepr': '()', 'kwargsrepr': '{}', 'origin': 'gen14@bb70df0745f1', 'reply_to': 'e365b7e7-b086-3648-9c4d-33dca44b5c65', 'correlation_id': '4d8e6bf5-6919-4882-9830-54d5cd478382', 'hostname': 'celery@dmugtasimov-Latitude-E5550', 'delivery_info': {'exchange': '', 'routing_key': 'celery', 'priority': 0, 'redelivered': None}, 'args': [], 'kwargs': {}}, b'[[], {}, {"callbacks": null, "errbacks": null, "chain": null, "chord": null}]', 'application/json', 'utf-8') kwargs:{})
[2021-02-27 12:46:34,848: DEBUG/MainProcess] Task accepted: thenewboston_bank.tasks.sync.set_primary_validator[4d8e6bf5-6919-4882-9830-54d5cd478382] pid:15629
[2021-02-27 12:46:34,863: INFO/ForkPoolWorker-1] Task thenewboston_bank.tasks.sync.set_primary_validator[4d8e6bf5-6919-4882-9830-54d5cd478382] succeeded in 0.015120853999633255s: None
[2021-02-27 12:46:34,864: DEBUG/MainProcess] TaskPool: Apply <function _fast_trace_task at 0x7f64f4374280> (args:('thenewboston_bank.tasks.sync.set_primary_validator', 'c93ce199-8325-45bb-985f-bb63a3347572', {'lang': 'py', 'task': 'thenewboston_bank.tasks.sync.set_primary_validator', 'id': 'c93ce199-8325-45bb-985f-bb63a3347572', 'shadow': None, 'eta': None, 'expires': None, 'group': None, 'group_index': None, 'retries': 0, 'timelimit': [None, None], 'root_id': '5c1d7a70-3715-4fb8-988a-9360d3efaa2c', 'parent_id': '5c1d7a70-3715-4fb8-988a-9360d3efaa2c', 'argsrepr': '()', 'kwargsrepr': '{}', 'origin': 'gen15629@dmugtasimov-Latitude-E5550', 'reply_to': '3907e8bb-ff87-3187-8c86-da9c4f709f54', 'correlation_id': 'c93ce199-8325-45bb-985f-bb63a3347572', 'hostname': 'celery@dmugtasimov-Latitude-E5550', 'delivery_info': {'exchange': '', 'routing_key': 'celery', 'priority': 0, 'redelivered': None}, 'args': [], 'kwargs': {}}, b'[[], {}, {"callbacks": null, "errbacks": null, "chain": null, "chord": null}]', 'application/json', 'utf-8') kwargs:{})
[2021-02-27 12:46:34,866: DEBUG/MainProcess] Task accepted: thenewboston_bank.tasks.sync.set_primary_validator[c93ce199-8325-45bb-985f-bb63a3347572] pid:15629
[2021-02-27 12:46:34,880: INFO/ForkPoolWorker-1] Task thenewboston_bank.tasks.sync.set_primary_validator[c93ce199-8325-45bb-985f-bb63a3347572] succeeded in 0.014641084999766463s: None

To reproduce:

1. Run make test-dockerized
2. Run make run-celery