https://github.com/GrahamDumpleton/mod_wsgi/commit/f8b43b2b79fabdcead4410f1a10484a10608ba6a

--- mod_wsgi-3.4/mod_wsgi.c.deadlock

+++ mod_wsgi-3.4/mod_wsgi.c

@@ -11113,8 +11113,10 @@

     while (1) {

         apr_sleep(apr_time_from_sec(1));

-        gilstate = PyGILState_Ensure();

-        PyGILState_Release(gilstate);

+        if (!wsgi_daemon_shutdown) {

+            gilstate = PyGILState_Ensure();

+            PyGILState_Release(gilstate);

+        }

         apr_thread_mutex_lock(wsgi_shutdown_lock);

         wsgi_deadlock_shutdown_time = apr_time_now();