Error: Unresponsive child for request in component authorize module cache

[James Fan]

Hi Alan,

We recently did a stress test for the home server proxy.
However, we found these two kinds of errors that block the server:

Wed Aug 20 06:58:04 2025 : Error: Unresponsive child for request 396685, in
component authorize module cache
Wed Aug 20 06:58:04 2025 : Error: Unresponsive child for request 396689, in
component <core> module

I know it could be slow SQL queries causing these errors. But I wonder if
the slow SQL queries cause the cache module to be unresponsive?

Because the errors of the cache module are more than the core module. And I
can't see the SQL module being unresponsive. So, I'm unsure where to find
the root cause. The SQL server is working fine.

We are conducting a stress test with 150 reqs/sec, but I'm unsure if a
deadlock issue arises due to setting the max_requests to 50000 and
utilizing the rlm_cache_tree driver for the local cache.

Please advise how to find the root cause, and I can provide more details
if needed. Thank you.

Regards,
James