From 6cb1b198a21beae85b47ccc34a11e171cc16ae17 Mon Sep 17 00:00:00 2001
From: Nicolae Vartolomei <nv@redpanda.com>
Date: Tue, 31 Mar 2026 12:59:38 +0100
Subject: [PATCH] feat: enable faulthandler for fatal signals in worker
 processes

---
 ducktape/tests/runner_client.py | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/ducktape/tests/runner_client.py b/ducktape/tests/runner_client.py
index d12a676d..ad7c9ab9 100644
--- a/ducktape/tests/runner_client.py
+++ b/ducktape/tests/runner_client.py
@@ -38,7 +38,9 @@
 
 
 def run_client(*args, **kwargs):
-    # On timeout, the runner sends SIGUSR1 to dump all thread stacks to stderr
+    # Dump Python tracebacks on fatal signals (SIGABRT, SIGSEGV, etc.) and on
+    # SIGUSR1 which the runner sends on timeout.
+    faulthandler.enable()
     faulthandler.register(signal.SIGUSR1)
     client = RunnerClient(*args, **kwargs)
     client.ready()