From: "Jason Coffin" <webobjects-dev@wocommunity.org>
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Date: Wed, 25 Mar 2026 10:04:40 -0400
To: "D Tim Cummings" <webobjects-dev@wocommunity.org>
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Subject: Re: [WO-DEV] Re: Help with Apache mod issues
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Hello Tim!=20

Just sending out an update... We followed your instructions below (using=
 a prefork version of Apache) and haven=E2=80=99t had an issue for 2 wee=
ks. I think it is now safe to say this resolved the issue for us.=20

Thank you again for your help!

Yours,
Jason Coffin

On Thu, Mar 5, 2026, at 9:37 AM, Jason Coffin wrote:
> Thank you! We will give that a try.
>
> On Wed, Mar 4, 2026, at 6:48 PM, D Tim Cummings wrote:
>> You need to use prefork version of Apache. See deploy instructions on
>>
>> https://wiki.wocommunity.org/xwiki/bin/view/documentation/Home/Deploy=
ment/Platforms/Deploying%20on%20Linux/Deploying%20on%20Ubuntu%2022.04/
>>
>> sudo apt install apache2
>> sudo a2dismod mpm_event
>> sudo a2enmod mpm_prefork
>>
>> Cheers
>>
>> Tim
>>
>> On 5/03/2026 02:59, Jason Coffin wrote:
>>> Hello all!
>>>=20
>>> I'm looking for help diagnosing an issue that we are seeing in a Web=
Objects production environment. I'm not the developer on the project, I'=
m the devops person and I know little about WebObjects.
>>>=20
>>> Here is our stack:
>>>=20
>>> Ubuntu version 20.04.1
>>> Apache version 2.4.41
>>> Project Wonder version 7.5-SNAPSHOT
>>> WebObjects version 5.4.3
>>>=20
>>> About once a day the Apache mod seems to stop working and no longer =
routes traffic to the WebObjects application. Restarting Apache solves t=
he issue until it crops up again. The Apache error logs show these error=
s, in the given order, and they repeat several times:
>>>=20
>>> lock_file_section(): failed to lock (1 attempts): Resource deadlock =
avoided
>>> ac_readConfiguration: WOShmem_lock() failed. Skipping reading config.
>>>=20
>>> Any idea what could be causing this issue? Should we be using a diff=
erent version of Apache or the WebObjects mod?=20
>>>=20
>>> We are also considering alternative methods for hosting the WebObjec=
ts application. Should we consider removing the Apache mod requirement e=
ntirely?
>>>=20
>>> Thank you kindly!
>>>=20
>>> Jason Coffin
>>>=20
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>
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