It's seems the Dispatcher::post() will be got deadlock on Windows 10(also windows server 2012) with the large calls for load test in 1 hour ~ a fer houws, the DUM thread call stack is:
Dum thread > Dispatcher::post() > mFifo.add > mCondition.signal, the thread is blocked on below line that never return then DUM thread is dead.
res = WaitForSingleObject(reinterpret_cast<HANDLE>(m_gate), INFINITE).
This deadlock is easy to replicated in our product - after start test, it will be appears in 10 - 1 hour, now we are using the std::unique_lock and std::condition_variable to instead of resip::Lock and resip::Condition in all resip FIFO, so far it works fine.
Note, the deadlock doesn't appears on Linux.