Merge #11593: rpc: work-around an upstream libevent bug
97932cd rpc: further constrain the libevent workaround (Cory Fields)
6b58360 rpc: work-around an upstream libevent bug (Cory Fields)
Pull request description:
A rare race condition may trigger while awaiting the body of a message.
This may fix some reported rpc hangs/crashes.
This work-around mimics what libevent does internally once a write has started, which is what usually happens, but not always due to the processing happening on a different thread: https://github.com/libevent/libevent/blob/
e7ff4ef2b4fc950a765008c18e74281cdb5e7668/http.c#L373
Fixed upstream at: https://github.com/libevent/libevent/commit/
5ff8eb26371c4dc56f384b2de35bea2d87814779
Tree-SHA512: b9fa97cae9da2a44101c5faf1e3be0b9cbdf722982d35541cf224be31430779c75e519c8ed18d06ab7487bfb1211069b28f22739f126d6c28ca62d3f73b79a52