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From: <Dominic DOT R DOT Jones AT faa DOT gov>
To: <cygwin AT cygwin DOT com>
Subject: Re: httpd-2.4.23 notice "No slotmem from mod_heartmonitor"
Date: Tue, 26 Jul 2016 19:17:53 +0000
Message-ID: <9820E0FA51BA9E488013F2BC442C0A6D63E9A8@006FCH1MPN2-072.006f.mgd2.msft.net>
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>> Activating mod_slotmem_shm (as a shared module) resolved this issue and
>> allowed httpd to start.  However, httpd now produces the following notice
>> on (successful) startup:
>> 
>>     [Mon Jul 25 09:27:40.718810 2016] [lbmethod_heartbeat:notice] [pid
2345] AH02282: No slotmem from mod_heartmonitor
>> 
>> I'm wondering if there changes to the static modules included in the new
version's package.  The changelog
>> for httpd itself didn't suggest any changes between these two versions
that would cause configuration differences.
>
>I don't know about Apache and these modules, but in order for SHM to be
> avilable, you must run cygserver.

cygserver is running.

After doing some more research, I suspect that the issue may lie in
mod_lbmethod_heartbeat being compiled into httpd while depending on
mod_heartmonitor (apparently to provide slotmem).
mod_heartmonitor is not compiled into the build.  Thus, even if it is enabled
as a shared module, I think that it is loaded after mod_libmethod_heartbeat
and thus is not available when mod_libmethod_heartbeat starts.  If this is the
case, it makes sense that this notice appears.

If this is correct, the solution would appear to be compiling mod_heartmonitor
into the package as a static module.


-----

Dominic R. Jones, Ph.D.

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