id summary reporter owner description type status milestone component version severity resolution keywords cc 12916 Network Issue rabindra@… chris_kohlhoff "My Tcp server occasionally has async_read calls failing with: The semaphore timeout period has expired (121) This is from boost::asio::async_read on a connected TCP socket. I have master and slave server communication, Slave is sending request to master and master socket is showing ""The semaphore time out period has expired"". Is there any way to handle this issue on requested server?" Bugs new To Be Determined asio Boost 1.63.0 Problem