@sergey-safarov - that error code and error message (11 - Resource temporarily unavailable)) typically happens when the target accepts the connection but it doesn't read data, so the sender app is filling the socket buffer.

From the logs, the connection is created and added to the internal hash, so that is not the problem, but transmitting the data seems to be the issue. What is the receiving party? A sip phone with msrp support, or some generic tool?

On the other hand, it is strange that you get it when using tlsf memory manager ...


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