google.api_core.exceptions.RetryError: Timeout of 60.0s exceeded, last exception: 503 DNS resolution failed for firestore.googleapis.com: C-ares status is not ARES_SUCCESS qtype=A name=firestore.googleapis.com is_balancer=0: DNS query cancelled

從 museum.py 第 24 行開始進行重現，使用 Python 3.12.2、Firebase SDK 6.1.0 以及所示的 Firestore 用戶端呼叫。檢查是否能夠重現該失敗，以及該失敗是由 SDK 還是由 firestore.googleapis.com 的 DNS 解析所造成。完成的條件是識別出一個可重現的 SDK 問題和明確的預期結果，但報告未定義程式碼變更。

[REQUIRED] Step 2: Describe your environment

• Operating System version: Mac OS
• Firebase SDK version: 6.1.0
• Firebase Product: firestore
• Python version: 3.12.2
• Pip version: 24.0 from /Library/Frameworks/Python.framework/Versions/3.12/lib/python3.12/site-packages/pip (python 3.12)

[REQUIRED] Step 3: Describe the problem

cred = credentials.Certificate("firebase-privateKey.json")
firebase_admin.initialize_app(cred) 
db = firestore.client()


collections = list(db.collections())
if collections:
    print("Collections found:", [col.id for col in collections])
else:
    print("No collections found or access denied.")

The code fails with error below.

Traceback (most recent call last):
  File "/Library/Frameworks/Python.framework/Versions/3.12/lib/python3.12/site-packages/google/api_core/grpc_helpers.py", line 76, in error_remapped_callable
    return callable_(*args, **kwargs)
           ^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/Library/Frameworks/Python.framework/Versions/3.12/lib/python3.12/site-packages/grpc/_channel.py", line 1181, in __call__
    return _end_unary_response_blocking(state, call, False, None)
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/Library/Frameworks/Python.framework/Versions/3.12/lib/python3.12/site-packages/grpc/_channel.py", line 1006, in _end_unary_response_blocking
    raise _InactiveRpcError(state)  # pytype: disable=not-instantiable
    ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
grpc._channel._InactiveRpcError: <_InactiveRpcError of RPC that terminated with:
        status = StatusCode.UNAVAILABLE
        details = "DNS resolution failed for firestore.googleapis.com: C-ares status is not ARES_SUCCESS qtype=SRV name=_grpclb._tcp.firestore.googleapis.com: DNS query cancelled"
        debug_error_string = "UNKNOWN:Error received from peer  {grpc_message:"DNS resolution failed for firestore.googleapis.com: C-ares status is not ARES_SUCCESS qtype=SRV name=_grpclb._tcp.firestore.googleapis.com: DNS query cancelled", grpc_status:14, created_time:"2025-02-02T19:42:12.316149+09:00"}"
>

The above exception was the direct cause of the following exception:

Traceback (most recent call last):
  File "/Library/Frameworks/Python.framework/Versions/3.12/lib/python3.12/site-packages/google/api_core/retry/retry_unary.py", line 144, in retry_target
    result = target()
             ^^^^^^^^
  File "/Library/Frameworks/Python.framework/Versions/3.12/lib/python3.12/site-packages/google/api_core/timeout.py", line 130, in func_with_timeout
    return func(*args, **kwargs)
           ^^^^^^^^^^^^^^^^^^^^^
  File "/Library/Frameworks/Python.framework/Versions/3.12/lib/python3.12/site-packages/google/api_core/grpc_helpers.py", line 78, in error_remapped_callable
    raise exceptions.from_grpc_error(exc) from exc
google.api_core.exceptions.ServiceUnavailable: 503 DNS resolution failed for firestore.googleapis.com: C-ares status is not ARES_SUCCESS qtype=SRV name=_grpclb._tcp.firestore.googleapis.com: DNS query cancelled

The above exception was the direct cause of the following exception:

Traceback (most recent call last):
  File "/Users/tenna/Desktop/tenna/art_sanpo/scraping/museum.py", line 24, in <module>
    collections = list(db.collections())
                  ^^^^^^^^^^^^^^^^^^^^^^
  File "/Library/Frameworks/Python.framework/Versions/3.12/lib/python3.12/site-packages/google/cloud/firestore_v1/client.py", line 279, in collections
    iterator = self._firestore_api.list_collection_ids(
               ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/Library/Frameworks/Python.framework/Versions/3.12/lib/python3.12/site-packages/google/cloud/firestore_v1/services/firestore/client.py", line 2057, in list_collection_ids
    response = rpc(
               ^^^^
  File "/Library/Frameworks/Python.framework/Versions/3.12/lib/python3.12/site-packages/google/api_core/gapic_v1/method.py", line 131, in __call__
    return wrapped_func(*args, **kwargs)
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/Library/Frameworks/Python.framework/Versions/3.12/lib/python3.12/site-packages/google/api_core/retry/retry_unary.py", line 293, in retry_wrapped_func
    return retry_target(
           ^^^^^^^^^^^^^
  File "/Library/Frameworks/Python.framework/Versions/3.12/lib/python3.12/site-packages/google/api_core/retry/retry_unary.py", line 153, in retry_target
    _retry_error_helper(
  File "/Library/Frameworks/Python.framework/Versions/3.12/lib/python3.12/site-packages/google/api_core/retry/retry_base.py", line 221, in _retry_error_helper
    raise final_exc from source_exc
google.api_core.exceptions.RetryError: Timeout of 60.0s exceeded, last exception: 503 DNS resolution failed for firestore.googleapis.com: C-ares status is not ARES_SUCCESS qtype=SRV name=_grpclb._tcp.firestore.googleapis.com: DNS query cancelled

I am running the script once a month, and It was working fine until 2025/1/5.
Suddenly stopped working yesterday (2025/2/1).

I can confirm the reject exists at: https://console.firebase.google.com/u/0/project/art-sanpo/overview?hl=ja
And the Blaze plan is turned on, access rule is allow read: if true; for all of the collections.