logoon  windows
Apache Lounge
Webmasters

 


About

Forum Index Downloads Search Register Log in  RSS Apache Lounge



Keep Server Online

If you find the Apache Lounge, the downloads and overall help useful, please express your satisfaction with a donation.

or

Bitcoin

A donation makes a contribution towards the costs, the time and effort that's going in this site and building.

Thank You! Steffen

Apache Lounge is not sponsored by anyone.

Your donations will help to keep this site alive and well, and continuing the building of the binaries.



mod_jk setup with Tomcat 7 freezes and 502

 
Post new topic   Reply to topic    Apache Forum Index -> Apache third-party Modules



View previous topic :: View next topic  
Author Message
b0s



Joined: 15 Nov 2013
Posts: 2
Location: Estonia, Tartu

PostPosted: Thu 03 Apr '14 12:29    Post subject: mod_jk setup with Tomcat 7 freezes and 502 Reply with quote

Hi
A rather complicated tomcat java webapp freezes ~3 times a week. The application itself installed and configured tomcat, but apache and mod_jk I installed myself.
Freeze = main page does not load and nothing is written into catalina.out about it (loglevel warn). And going directly though aadress:8080/appmain is also "frozen". Not sure if this is caused by mod_jk somehow, so I would need to know if my setup is correct in that part. Can this tomcat freeze be caused by apache or mod_jk at all?
If this cannot be caused by my apache, mod_jk setup I need to contact the software-s support.

Soft:

Centos 6.4
Oracle JDK 1.7.051
tomcat 7.0.33 preconfigured by the application
mod_jk version 1.2.39
Apache 2.2.15
The application is meant to be accessed though apache-s SSL for certificate information ( SSLOptions +ExportCertData). https://aadress/appmain

httpd.conf changes:
Timeout 60
KeepAlive On
MaxKeepAliveRequests 100
KeepAliveTimeout 10
<IfModule worker.c>
StartServers 4
MaxClients 300
MinSpareThreads 25
MaxSpareThreads 75
ThreadsPerChild 25
MaxRequestsPerChild 5000
</IfModule>
And aliases like Alias /app_html/ "/opt/app/appname/app_html/"

SSL.conf contains Certificate handling and some RewriteCond-s for ending session.

workers.properties
workers.tomcat_home=/opt/user/app/Tomcat
workers.java_home=/usr/java/latest/
ps=/
#ajp13 worker
worker.list=ajp13
worker.ajp13.port=8009
worker.ajp13.host=localhost
worker.ajp13.type=ajp13
worker.ajp13.socket_keepalive=1
worker.ajp13.socket_timeout=15
worker.ajp13.retries=3
worker.ajp13.retry_interval=100
worker.ajp13.max_packet_size=16384
worker.inprocess.jvm_lib=$(workers.java_home)$(ps)jre$(ps)lib$(ps)amd64$(ps)server$(ps)libjvm.so

mod_jk.conf
<IfModule !mod_jk.c>
LoadModule jk_module /etc/httpd/modules/mod_jk.so
</IfModule>
JkWorkersFile "/etc/httpd/conf.d/workers.properties"
JkLogFile "/etc/httpd/logs/mod_jk.log"
JkShmFile "/etc/httpd/logs/mod_jk.shm"
JkRequestLogFormat "%w %V %T"
JkLogLevel info
JkLogStampFormat "[%a %b %d %H:%M:%S %Y]"
JkOptions +DisableReuse
JkMount /appmain ajp13
JkMount /appmain/* ajp13

Adding to mod_jk advanced options like keepalives, retries, JkShmFile, +DisableReuse and enabling apache-s keepalive caused 502 bad gateway errors showing up.
Is there something wrong is this setup, that could cause a tomcat freeze or 502 bad gateway errors?

Thank you in advance!
Back to top


Post new topic   Reply to topic    Apache Forum Index -> Apache third-party Modules
Page 1 of 1