Oops sorry, it seems two threads got tangled in Google Group:
https://groups.google.com/g/grpc-io/c/_0wBUQB_QDk/m/GxHoowm-CQAJ

On Thu, Apr 15, 2021 at 10:12 AM Jeff Steger <[email protected]> wrote:

> Lidi,
> Your response was not to my question, but probably to someone else’s
> question.
>
> On Wed, Apr 14, 2021 at 2:49 PM 'Lidi Zheng' via grpc.io <
> [email protected]> wrote:
>
>> Hi Tarek,
>>
>> The `asyncio.CancelledError` is only generated when an asyncio coroutine
>> is cancelled, in gRPC case, an ongoing RPC is cancelled locally. If the RPC
>> representation (the grpc.aio.Call object) is passed to other coroutines,
>> it's possible that they might cancel it, hence current coroutine will
>> receive a `asyncio.CancelledError`.
>>
>>
>> On Monday, April 12, 2021 at 9:36:06 AM UTC-7 [email protected] wrote:
>>
>>> Hi,
>>> Sounds strange. I have recently used a similar RPC call with grpc 1.34.
>>> Not observed such issue.
>>> You can try 1.34 or the latest.
>>>
>>> Regards,
>>> Nandi
>>>
>>> On Sun, Apr 11, 2021 at 6:16 AM Jeff Steger <[email protected]> wrote:
>>>
>>>>
>>>>
>>>> Hi all,
>>>> I am using grpc 1.23.0. I recently came across an issue that seems to
>>>> be documented here:
>>>>
>>>> https://github.com/paralin/grpc-bus/issues/35
>>>>
>>>> In sum:
>>>>
>>>> When a new call is created with a streaming request/non-streaming
>>>> response, an initial message is sent immediately (before call.write() is
>>>> ever explicitly invoked) with a blank value.
>>>>
>>>>
>>>>
>>>> Has anyone seen this before and does anyone know if there is a grpc
>>>> version where this is fixed?  Thanks!
>>>>
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>>>
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>>>> <https://groups.google.com/d/msgid/grpc-io/CAA-WHum4DOYr9jQAX-iDSxc%3Dy9F4mFMYWPq72kWyRuiUpbDM5Q%40mail.gmail.com?utm_medium=email&utm_source=footer>
>>>> .
>>>>
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