https://bz.apache.org/bugzilla/show_bug.cgi?id=65769

--- Comment #7 from ldeliso <[email protected]> ---
Created attachment 38145
  --> https://bz.apache.org/bugzilla/attachment.cgi?id=38145&action=edit
apache installation details

@Eric: when the child process hangs, it's immediately terminated so no luck in
tracing it. Sometimes a new child process is spawned (and however no threads
are there to accept requests) and it's stuck in this state (though this has
been observed too on working child processes when the issue does not arise):

++++++++++++++++++++++++++++++++++++++++++++++
#0  0x00007fca258239e4 in read () from /lib64/libpthread.so.0
#1  0x0000000000460f84 in ap_mpm_podx_check (pod=<optimized out>) at
mpm_unix.c:546
#2  0x000000000047338f in child_main (child_num_arg=child_num_arg@entry=1,
child_bucket=child_bucket@entry=0) at event.c:2647
#3  0x000000000047373a in make_child (s=0x15f9e48, slot=slot@entry=1,
bucket=bucket@entry=0) at event.c:2754
#4  0x000000000047420a in perform_idle_server_maintenance (child_bucket=0) at
event.c:2973
#5  server_main_loop (remaining_children_to_start=0) at event.c:3103
#6  event_run (_pconf=<optimized out>, plog=<optimized out>, s=<optimized out>)
at event.c:3180
#7  0x000000000043774e in ap_run_mpm (pconf=pconf@entry=0x15ce3c8,
plog=0x15fb608, s=0x15f9e48) at mpm_common.c:95
#8  0x000000000042fd0e in main (argc=<optimized out>, argv=<optimized out>) at
main.c:819
++++++++++++++++++++++++++++++++++++++++++++++

This server runs RHEL 8 (but also tried on CentOS 7 / Ubuntu 21.10) and a very
basic apache compiled from source. I have attached the details.

I did some tests with the worker MPM and this issue is not present. All works
as expected. So this issue is only present with the event MPM.


@Yann: I applied your patch but unfortunately it does not fix this issue.

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