lidavidm commented on PR #35090:
URL: https://github.com/apache/arrow/pull/35090#issuecomment-1508271579
Correction: the main thread has a different stack trace, so it seems less
likely that two threads are trampling on ExecCtx and more that there's
something being tickled in gRPC:
```
* thread #1, queue = 'com.apple.main-thread'
* frame #0: 0x0000000101c4c760
libgrpc.30.dylib`grpc_tcp_server_unref(grpc_tcp_server*)
frame #1: 0x0000000101b2205e libgrpc.30.dylib`grpc_core::(anonymous
namespace)::Chttp2ServerListener::Orphan() + 286
frame #2: 0x0000000101ceb844
libgrpc.30.dylib`grpc_core::Server::ShutdownAndNotify(grpc_completion_queue*,
void*) + 820
frame #3: 0x0000000101cee7e4
libgrpc.30.dylib`grpc_server_shutdown_and_notify + 276
frame #4: 0x0000000100daa9cc
libgrpc++.1.52.dylib`grpc::Server::ShutdownInternal(gpr_timespec) + 220
frame #5: 0x00000001012706d1
libarrow_flight.1200.dylib`arrow::flight::transport::grpc::(anonymous
namespace)::GrpcServerTransport::Shutdown() + 33
frame #6: 0x0000000101250755
libarrow_flight.1200.dylib`arrow::flight::FlightServerBase::Shutdown(std::__1::chrono::time_point<std::__1::chrono::system_clock,
std::__1::chrono::duration<long long, std::__1::ratio<1l, 1000000l> > >
const*) + 149
frame #7: 0x0000000100396131
libarrow_flight_testing.1200.dylib`arrow::flight::DataTest::TearDownTest() + 129
```
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