Hi Ganesh,
Also if several OFBiz instances share the same DB be sure to have the Distributed Entity Cache Clear (DCC) Mechanism
<https://cwiki.apache.org/confluence/display/OFBIZ/Distributed+Entity+Cache+Clear+%28DCC%29+Mechanism> sets properly
Jacques
Le 22/08/2016 à 10:22, Jacopo Cappellato a écrit :
Hi Ganesh,
there are a few things that can improve the situation, but the proper
solution depends on the specific usage and components involved, so it is
difficult to be precise.
However, here are a few miscellaneous ideas you could consider while you
test:
1) try to (temporarily) move out of the mix the web server and ajp
protocol/connector; let the Tomcat instances communicate directly with the
load balancer; if you experience the same issue then we can exclude that
the problem is in the setup of the ajp connectors; to be noted that recent
versions of Tomcat are very efficient as web servers too
2) are you noticing this in production? are you running some load tests to
recreate the issue? (i.e. with JMeter)
3) are you using the http or https connections (or both)? If both, would it
be possible for you to initially try with http (or https) only, then fine
tune the Tomcat's connector to work properly before testing with https (or
http)? again, this would help to focus the scope of the research and
optimizations
4) the behavior you are noticing (grow, under load, of thread count that
are destroyed after some minutes) may indicate that these threads are
created to maintain the user's session, that if ide are destroyed after the
number of minutes set in the web.xml file of your webapp (see
session-timeout element); how many users/browsers are hitting the system
versus the number of hits each performs? Does your load balancer supports
sticky sessions?
5) the file that is relevant for the proper setup of Tomcat connectors is
in framework/catalina/ofbiz-component.xml
6) when you setup multiple instances of OFBiz in a cluster please make sure
you configure them properly; this blog post may be useful as an
introduction http://www.hotwaxsystems.com/ofbiz/apache-ofbiz-performance/
I will stop for now; based on your feedback I may ask further questions or
may be able to be more precise.
Good luck,
Jacopo
On Mon, Aug 22, 2016 at 9:31 AM, Ganesh Bawne <[email protected]>
wrote:
Hi Jacopo,
Thank for your reply.
Somehow, Satish is not getting the mails of this thread. He is working with
me.
Yes, the Tomcat instance is embedded one and we have to tune it to close
idle threads relatively quickly.
One machine is running an Apache Web server with mod_jk setup to
communicate with different instances of Ofbiz. Though, the OFbiz instances
are sometime unresponsive. We observed that the thread count is more when
this happens. After 10-15 mins the thread counts become normal and
application run smoothly. So looks like Tomcat is not clearing either idle
threads or something wrong with configuration in the setup.
If anyone suggest, optimal configurations setting that we can use for OFbiz
instance running on machine with 2 core processor having 4 GB RAM. The
machine is dedicated to run only 1 Ofbiz instance.
Thanks,
On Mon, Aug 22, 2016 at 12:18 PM, Jacopo Cappellato <
[email protected]> wrote:
Jacques,
I don't see how the old appserver component could help Satish to solve
his
problem: Satish, could you please confirm if you are looking to configure
the Tomcat instance embedded in OFBiz to handle the load in a cluster?
Thanks
Jacopo
On Mon, Aug 22, 2016 at 8:19 AM, Jacques Le Roux <
[email protected]> wrote:
Hi Satish,
There is still the appserver component in the R14.12 branch (note that
the
R14.12 was not and will never be released
http://ofbiz.apache.org/downlo
ad.html "Special Notice Regarding Branches 14.12 and 15.12:" section).
This component was originally in the framework part but we stopped to
support it already years ago and decided to downgrade it and move it to
specialpurpose, then recently in Attic.
I'd love to see it resurrected but it's not an effort the community
decided to pursue.
So the best you have is this component and the documentation at
https://cwiki.apache.org/confluence/display/OFBIZ/Run+OFBiz+
under+outside+Application+Servers
In other words you are on your own on this; though I'd personally, and
I
guess the community too, appreciate a shareable success in this area!
Jacques
Le 22/08/2016 à 07:55, satish a écrit :
Hi All,
Is there any doc to configure tomcat server on production server.
Actually,
We have multi instance OFBiz setup which is load balanced by separate
apache
via ajp. We are facing issue on OFBiz instance server having
increasing
thread randomly and because of this server and application become
unresponsive. Usually, this happen with increasing OFBiz instance
threads
count. We are using OFBiz version 14.12
Thanks
Satish Kumar
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Thanks & Regards
Ganesh Bawne
Enterprise Software Developer
Viithiisys Pvt. Ltd.
http://www.viithiisys.com
