Sorry, I could not get your point in using two servers which are getting
mail for the same domain, without having a common db for them. Of
course as I do not know you project details, it might have special use
case here. I just wondered.
And I meant;
increase Spool Manager threads
decrease smtp connectiontimeout
decrease connection manager idle timeout
and increase connection manager max-connections.
Özgür Eroğlu
On 04/01/2015 11:43 AM, Mahesh Sivarama Pillai wrote:
Hi,
Thanks for the inputs. We don't have any DB configurations. Its all file
based. There are two servers which are already behind the load balancer. We
were getting Too Many Open files issues.. We have increased the ulimit to
the maximum two days back. Did you mean "decrease the timeout and increase
the max-connections ?" In a 4CPU machine, can I increase the
max-connections to say 100 if we came to know that its about load ?
Thanks
Mahesh
On Wed, Apr 1, 2015 at 1:16 PM, Özgür EROĞLU <oeroglu.c...@gmail.com> wrote:
Hi Mahesh,
All you have asked may be the cause, I can not give clear answer right
now. But if your system have sufficient resources try to increase
max-connections and timeout parameters. And observe whether any differences
occur or not.
But I recommend you to use more than one James instances which are
connected to the same and replicated database server( howto do it depends
on your DB choice) and put them all behind a load balancer, so that you can
reduce the load on one server (of course this will be solution only if the
problem is the actual load).
Özgür Eroğlu
On 04/01/2015 10:22 AM, Mahesh Sivarama Pillai wrote:
Hi All,
We have rolled out James 2.3.2 to production for our email processing
application. I see that James is no longed accepting connetions after few
days of run. It processes around 100K email a day and sends a good amount
of Notification emails through RemoveDelivery. James is running on a 4
CPU
machine with 8GB RAM. Heapsize of James is set to 4GB with Openjdk 1.7.
INITIALLY WE THOUGHT the server was getting killed/terminated. As per the
latest information, server is not killed.. Our support team used to
restart
the server when we get "Connection Refused" error from port 25..We have a
monitoring tool which Connects to James server every few seconds, and
issue
a QUIT command... This monitoring tool is getting Connection Refused
error.
Hence the team thought the server is down and followed the routine Stop,
Start commands...
I have the following configurations in various places in the config.xml. I
have INFO logging enabled. I couldnt find any WARN messages about
connections.
SMTP Server (the only process enabled):
<connectiontimeout>360000</connectiontimeout>
Spool Manager: <threads> 10 </threads>
Connections Manager
<connections>
<idle-timeout>300000</idle-timeout>
<max-connections>30</max-connections>
</connections>
Thread Manager
<thread-manager>
<thread-group>
<name>default</name>
<priority>5</priority>
<is-daemon>false</is-daemon>
<max-threads>100</max-threads>
<min-threads>20</min-threads>
<min-spare-threads>20</min-spare-threads>
</thread-group>
</thread-manager>
The total number of threads (spool+remotedelivery etc ) are under very
much
under 100. We don't have any DB configuration in config.xml as well. Do
you
think the timeout values might cause the connection refused errors ?.
Especially the idle-timeout ? Isn't 5 minutes too high ? If say 30 clients
are taking few minutes, this will be more than enough to raise an alert
from the monitoring tool...even if all the connections are being used, it
should be release after the processing done right ? Is there any chance of
the connections not being released and going back to the pool ? Please
provide your comments..
Thanks
Mahesh
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