Hi all, has anyone experienced the following issu...
# ask-community
j
Hi all, has anyone experienced the following issue with the prefect worker utilizing Kubernetes failing to submit flows to the infrastructure after running fine for several hours? A restart is required in order for the worker to function again. Here's the error trace
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Failed to submit flow run '8093ef5c-64f8-42eb-9f4b-045ed7e7d6ad' to infrastructure.
Traceback (most recent call last):
  File "/usr/local/lib/python3.11/site-packages/urllib3/connection.py", line 174, in _new_conn
    conn = connection.create_connection(
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/usr/local/lib/python3.11/site-packages/urllib3/util/connection.py", line 95, in create_connection
    raise err
  File "/usr/local/lib/python3.11/site-packages/urllib3/util/connection.py", line 85, in create_connection
    sock.connect(sa)
OSError: [Errno 99] Cannot assign requested address

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "/usr/local/lib/python3.11/site-packages/urllib3/connectionpool.py", line 714, in urlopen
    httplib_response = self._make_request(
                       ^^^^^^^^^^^^^^^^^^^
  File "/usr/local/lib/python3.11/site-packages/urllib3/connectionpool.py", line 403, in _make_request
    self._validate_conn(conn)
  File "/usr/local/lib/python3.11/site-packages/urllib3/connectionpool.py", line 1053, in _validate_conn
    conn.connect()
  File "/usr/local/lib/python3.11/site-packages/urllib3/connection.py", line 363, in connect
    self.sock = conn = self._new_conn()
                       ^^^^^^^^^^^^^^^^
  File "/usr/local/lib/python3.11/site-packages/urllib3/connection.py", line 186, in _new_conn
    raise NewConnectionError(
urllib3.exceptions.NewConnectionError: <urllib3.connection.HTTPSConnection object at 0x7f60db485950>: Failed to establish a new connection: [Errno 99] Cannot assign requested address

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "/usr/local/lib/python3.11/site-packages/prefect/workers/base.py", line 834, in _submit_run_and_capture_errors
    result = await self.run(
             ^^^^^^^^^^^^^^^
  File "/usr/local/lib/python3.11/site-packages/prefect_kubernetes/worker.py", line 506, in run
    job = await run_sync_in_worker_thread(
          ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/usr/local/lib/python3.11/site-packages/prefect/utilities/asyncutils.py", line 91, in run_sync_in_worker_thread
    return await anyio.to_thread.run_sync(
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/usr/local/lib/python3.11/site-packages/anyio/to_thread.py", line 33, in run_sync
    return await get_asynclib().run_sync_in_worker_thread(
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/usr/local/lib/python3.11/site-packages/anyio/_backends/_asyncio.py", line 877, in run_sync_in_worker_thread
    return await future
           ^^^^^^^^^^^^
  File "/usr/local/lib/python3.11/site-packages/anyio/_backends/_asyncio.py", line 807, in run
    result = context.run(func, *args)
             ^^^^^^^^^^^^^^^^^^^^^^^^
  File "/usr/local/lib/python3.11/site-packages/prefect_kubernetes/worker.py", line 628, in _create_job
    job = batch_client.create_namespaced_job(
          ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/usr/local/lib/python3.11/site-packages/kubernetes/client/api/batch_v1_api.py", line 210, in create_namespaced_job
    return self.create_namespaced_job_with_http_info(namespace, body, **kwargs)  # noqa: E501
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/usr/local/lib/python3.11/site-packages/kubernetes/client/api/batch_v1_api.py", line 309, in create_namespaced_job_with_http_info
    return self.api_client.call_api(
           ^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/usr/local/lib/python3.11/site-packages/kubernetes/client/api_client.py", line 348, in call_api
    return self.__call_api(resource_path, method,
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/usr/local/lib/python3.11/site-packages/kubernetes/client/api_client.py", line 180, in __call_api
    response_data = self.request(
                    ^^^^^^^^^^^^^
  File "/usr/local/lib/python3.11/site-packages/kubernetes/client/api_client.py", line 391, in request
    return <http://self.rest_client.POST|self.rest_client.POST>(url,
           ^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/usr/local/lib/python3.11/site-packages/kubernetes/client/rest.py", line 276, in POST
    return self.request("POST", url,
           ^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/usr/local/lib/python3.11/site-packages/kubernetes/client/rest.py", line 169, in request
    r = self.pool_manager.request(
        ^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/usr/local/lib/python3.11/site-packages/urllib3/request.py", line 78, in request
    return self.request_encode_body(
           ^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/usr/local/lib/python3.11/site-packages/urllib3/request.py", line 170, in request_encode_body
    return self.urlopen(method, url, **extra_kw)
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/usr/local/lib/python3.11/site-packages/urllib3/poolmanager.py", line 376, in urlopen
    response = conn.urlopen(method, u.request_uri, **kw)
               ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/usr/local/lib/python3.11/site-packages/urllib3/connectionpool.py", line 826, in urlopen
    return self.urlopen(
           ^^^^^^^^^^^^^
  File "/usr/local/lib/python3.11/site-packages/urllib3/connectionpool.py", line 826, in urlopen
    return self.urlopen(
           ^^^^^^^^^^^^^
  File "/usr/local/lib/python3.11/site-packages/urllib3/connectionpool.py", line 826, in urlopen
    return self.urlopen(
           ^^^^^^^^^^^^^
  File "/usr/local/lib/python3.11/site-packages/urllib3/connectionpool.py", line 798, in urlopen
    retries = retries.increment(
              ^^^^^^^^^^^^^^^^^^
  File "/usr/local/lib/python3.11/site-packages/urllib3/util/retry.py", line 592, in increment
    raise MaxRetryError(_pool, url, error or ResponseError(cause))
urllib3.exceptions.MaxRetryError: HTTPSConnectionPool(host='172.30.0.1', port=443): Max retries exceeded with url: /apis/batch/v1/namespaces/prefect-2x/jobs (Caused by NewConnectionError('<urllib3.connection.HTTPSConnection object at 0x7f60db485950>: Failed to establish a new connection: [Errno 99] Cannot assign requested address'))
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