On 30/07/2018 12:44, Giacomo Arru - BETA Technologies wrote:
Hi Aleksandar, thank you for your reply.
For which particular feature do you need ajp?
I have used several tomcats with httpd with ajp but after some
horrible errors we switched to http connector.
We wanted to use HTTP Connector, and set it up. But we couldn't manage
to make the app work correctly: we coudn't upload files > 60k and
tweaking nginx and tomcat configuration wouldn't help. We were unable
to debug the problem. With AJP connector, all features work fine. The
app is developed with Vaadin 8.
Well this sounds weird as ajp and http have a lot common parts in httpd
and tomcat.
I can help you to debug this behaviour if your are willing.
We have no static files in our app because they already are served with a CDN.
We would like test nginx with AJP connector (if somehow supported!).
Well there is one ajp module but I'm not sure how production ready it is.
https://github.com/yaoweibin/nginx_ajp_module
client_max_body_size is set to 128m
What's the message in the error log when the upload stops/breaks?
Could you get a debug log?
https://nginx.org/en/docs/debugging_log.html
so I think the problem occurs at http level while uploading files but I
can't manage to debug my system.
As we don't know anything about you system it will help a lot to get
some infos about your setup.
Versions + configs:
OS:
tomcat:
httpd:
nginx:
Environment : azure, google, aws, bare metal, .... ?
Giacomo
Best regards
Aleks
PS: If it's OT for the list please let us know, thanks.
Da: "Aleksandar Lazic" <[email protected]>
A: "nginx" <[email protected]>
Inviato: Sabato, 28 luglio 2018 18:41:59
Oggetto: Re: nginx -> httpd -> mod_jk -> tomcat
Hi.
On 26/07/2018 10:06, Giacomo Arru - BETA Technologies wrote:
Hi everybody,
I recently begun using proxy with nginx (same tests were made with
haproxy).
Which one do you prefer as both are very good and have similar features.
My needs are to proxy for failover and balancing tomcat: I need to
serve lots of users with production app.
While I understood that a 100% tomcat AJP1.3 compatibility is
achievable with apache httpd only and mod_jk, I successfully serve my
app with apache to a simple 80 http port (cookie path already
patched). So I decided to have a localhost apache httpd to proxy tomcat
with AJP. IT works perfectly.
For which particular feature do you need ajp?
I have used several tomcats with httpd with ajp but after some horrible
errors we switched to http connector.
https://tomcat.apache.org/tomcat-9.0-doc/config/http.html
In case you don't need a special feature in httpd this makes also
possible to reduce the complexity of your chain ;-)
nginx (http/https/server static files) -> tomcat
Now, I need to proxy httpd with nginx, adding SSL with letsencrypt. I
successfuly configured the proxy and everything works but uploads: if I
send a file to my app, only small uploads work.
I'd like to investigate the headers, maybe I need to transform some
string but I'm a completely newbie from this point of view.
Do you have some tips on how to investigate the problem?
With small you mean ~1M, that's the default setup for
client_max_body_size
https://nginx.org/en/docs/http/ngx_http_core_module.html#client_max_body_size
Thanks,
Giacomo Arru
Best regards
Aleks
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