On 3/8/2024 1:55 AM, Aaron Rosenzweig via Webobjects-dev wrote:
Thank you Stefan, Johann, and the community for making the switch from
mod_Webobjects.so adaptor to the built-in Apache mod_proxy module.
It helped us out this week to dig up Stefan’s 2015 video presentation on this
topic, utilize the ERXApplication cookie generation, and the migration tab in
Java Monitor.
The reason for us to make the switch was because Apache had become unstable. It
was having numerous segmentation faults. We were using the latest available
Apache 2.4.x for Amazon Linux along with freshly compiled from source WO
Adaptor taken from latest WOnder repo. Whenever httpd wet-the-bed, we’d lose
communication with an app instance. It seems there was no rhyme or reason to
what was causing it to crash. It did seem that when we downloaded user files
(passed from disk to web browser through fileInputStreams) that we’d be more
likely to see a segmentation fault anywhere from 5 to 7 request-response loops
later (navigating the app, clicking links). File sizes ranged from somewhat
small like 4 megs up to about 250 megs.
It was almost as if the WO adaptor was getting corrupted. Apache would give
errors about unreadable headers that looked like a stream of binary data and
then shortly after segmentation fault.
Some Linux distros do not configure Apache with MPM-prefork anymore
these days. We observed major problems with MPM-event / MPM-multithread
in combination with WO module, including httpd process crashes. We
switched back to prefork and that solved the issue.
But clearly, mod_proxy seems to be the better option here, we are
looking forward to this.
Whats the 'official' state of mod_WebObjects? Will it become legacy
or get abandoned? Are there any plans?
Thank you all,
Michael
--
___________________________
Michael Schmiedgen, BSc
Senior Software Engineer
Takwa GmbH
Friedrich-List-Str. 15
99096 Erfurt GERMANY
Tel +49 361 6534096
Fax +49 361 6534097
Mail schmied...@takwa.de
Web http://www.takwa.de/
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