Dear all, On my last post "Why a "core dump" error occurs when a thread exits in container but it's correct when running in native linux" might be misleading. I did further test and the steps are described below. 1) First, the container is started (we have the first terminal window) 2) Use virsh lxc-enter-namespace command to open another terminal (we have the second terminal) 3) Execute "exit" in the first terminal to quit container 4) Then an error is reported by the second terminal "internal error; child process (XXX) unexpected fatal signal 9" and the terminal is frozen then. How I solved this problems? Best regards, Cheng