Check what a running process is doing: print stack trace of an uninstrumented Python program

Question

Is there a way on Linux to check what a running Python daemon process is doing? That is, without instrumenting the code and without terminating it? Preferably I\'d like to get t

Answer 1

Some of the answers in Showing the stack trace from a running Python application are applicable in this situation:

• pyrasite (this was the one that worked for me):

  $ sudo pip install pyrasite
  $ echo 0 | sudo tee /proc/sys/kernel/yama/ptrace_scope
  $ sudo pyrasite 16262 dump_stacks.py # dumps stacks to stdout/stderr of the python program
  

• pyringe

• pydbattach - couldn't get this to work, but the repository https://github.com/albertz/pydbattach contains pointer to other tools
• pstack reportedly prints the python stack on Solaris