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fix: https://github.com/triton-inference-server/server/issues/8537 #435

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fix: https://github.com/triton-inference-server/server/issues/8537 #435

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5 changes: 4 additions & 1 deletion src/pb_stub.cc
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Original file line number Diff line number Diff line change
Expand Up @@ -936,10 +936,13 @@ Stub::RunCoroutine(py::object coroutine, bool in_background)
py::object py_future = py::module_::import("asyncio").attr(
"run_coroutine_threadsafe")(coroutine, loop);
if (in_background) {
// We should add the future to background_futures_ before attaching a
// done callback to avoid the issue described here:
// https://github.com/triton-inference-server/server/issues/8537
background_futures_.attr("add")(py_future);
py_future.attr("add_done_callback")(
py::module_::import("c_python_backend_utils")
.attr("async_event_future_done_callback"));
Comment on lines 943 to 945
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@aleksn7 aleksn7 May 12, 2026

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This should never happen.

background_futures_.attr("add")(py_future);
return py::none();
}
return py_future.attr("result")();
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