Debugging Hung Python Processes with GDB by Brian Bouterse

Abstract

When things go wrong in production, it can be necessary to troubleshoot problems where they occur, instead of in a development environment. In those situations having a working knowledge of GDB, GDB Python Extensions, and strace is very helpful. You will see some simple techniques to get insight into those situations. This talk outlines several techniques for connecting to an already running, "stuck", or deadlocked Python process using GDB for debugging.

During the talk, we will:

I have had to debug several hard-to-find bugs that were very infrequent deadlocks using Python. Furthermore it was happening on remote machines I could not have network access to. This technique was invaluable in those situations.

Description

Everything is in the abstract