[Public] Hi Khadem snipped Hi Vipin, Glad you got the reason. I have only checked it in testpmd, any other application which provides primary-secondary support could also follow the same model. This patch only adds stability and robustness to primary-secondary applications. Primary applications can be closed, quit or shutdown by various reasons while secondary end-up with dangling pointers. Without the primary application, the secondary could not do any rx or tx. Can you please answer to the previous question `are you SIGKILL or doing graceful shutdown to primary`? IBoth are different behaviour