Gevent greenlet stuck when using stream recognize request in a separate thread. about google-cloud-python HOT 3 OPEN

So upon load testing, I found that if I have 30 concurrent streaming recognize sessions, it would create problem where all threads stuck. I have tried to use both gevent greenlet and native thread pool, nothing helps with this limit.

On the other hand, concurrency under 25 seems to work fine. I've also seen this post arguing about grpc max concurrency settings. I assume we are using grpc underneath this speech recognition package. Is there a way we can increase concurrency on speech client?

Could someone help take a look? Thank you so much!

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Hi @dongzeli95 ,

Thanks for reporting this issue. This is potentially related to grpc/grpc#36265, googleapis/python-bigtable#949 and #12423. To confirm, can you try downgrading to grpcio==1.58.0?

from google-cloud-python.

@parthea Just confirmed that changing dependency onto grpcio==1.58.0 didn't help with this issue. Hope that helps.

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