37227327495
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Ran 04 Oct 2026 07:13PM UTC

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Build # 37227327495

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push

github

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web-flow

Commit Message

Call set_write_buffer_limits(0) for UDPSockets so that send returns once data hits the kernel (#1294)

A send() cancelled while blocked on the post-send wait leaves its datagram in the asyncio transport's buffer with the protocol still paused. Without a wait before sendto(), the next send() hands its datagram straight to the transport, which appends it to that non-empty buffer without ever trying the OS, so repeated cancellation grows the buffer despite the zero high water mark.

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Co-authored-by: Claude Opus 5 <noreply@anthropic.com>

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