pkg/50990: apache-2.2.31nb2 is not working well on netbsd-7

[martin%NetBSD.org@localhost]

>Number:         50990
>Category:       pkg
>Synopsis:       apache-2.2.31nb2 is not working well on netbsd-7
>Confidential:   no
>Severity:       serious
>Priority:       medium
>Responsible:    pkg-manager
>State:          open
>Class:          sw-bug
>Submitter-Id:   net
>Arrival-Date:   Mon Mar 21 08:35:00 +0000 2016
>Originator:     Martin Husemann
>Release:        NetBSD 7.0_STABLE
>Organization:
The NetBSD Foundation, Inc.
>Environment:
System: NetBSD emmas.aprisoft.de 7.0_STABLE NetBSD 7.0_STABLE (EMMAS) #0: Tue Mar 15 18:40:15 CET 2016 martin%emmas.aprisoft.de@localhost:/usr/src-7/sys/arch/i386/compile/EMMAS i386
Architecture: i386
Machine: i386
>Description:

Not sure if this is a pkg or a kern problem - recording here first, need
to investigate more.

I updated this machine from netbsd-6 to netbsd-7 (latest checkout about a week
ago) and then recompiled all pkgs for it.

Since then, apache22 over night stops serving requests.
When I check in the morning, only a single httpd process is running and
it doesn't answer new connections.

0xbb864bb7 in accept () from /usr/lib/libc.so.12
(gdb) bt
#0  0xbb864bb7 in accept () from /usr/lib/libc.so.12
#1  0xbb9b34a5 in accept () from /usr/lib/libpthread.so.1
#2  0xbb347df4 in cgid_start () from /usr/pkg/lib/httpd/mod_cgid.so
#3  0xbb348a0a in cgid_init () from /usr/pkg/lib/httpd/mod_cgid.so
#4  0x08077381 in ap_run_post_config ()
#5  0x080929f1 in main ()

Another strange thing:
# /etc/rc.d/apache status
apache is not running.

and sometimes starting apache does nothing at all (it just exits with status 0).

>How-To-Repeat:
no idea

>Fix:
n/a