Hello,
I cannot get my mod_jk status page to work.
Maybe it is because I am on windows?
It seems:
worker.list=jk-manage
worker.jk-manage.type=status
worker.jk-manage.mount=/admin/status/jk
only takes a linux style path for the
mount?
We upgraded to the latest mod_jk and this were
the results:
1: All monitors were fine, there were no
bottlenecks anywhere that we could find(cpu's,HD's and networks all seemed
fine).
2: This time when we brought the servers to their
knees, they recovered a short time after the test was completed.
3: We tried the socket_keepalive=true for
the workers and the server did not recover after
4: the only problem we can find is after the test
in the mod_jk log we have about 20-30 lines of this:
[Mon Sep 17 08:03:49.906 2007] [7948:4868]
[error] jk_ajp_common.c (2097): (tomcat5) Connecting to tomcat failed. Tomcat
is probably not started or is listening on the wrong port
The lines vary only by the (tomcat5) being any of
the tomcats in the loadbalance.
It seems like apache/tomcat/mod_jk are reaching
the max number of connections between each other or something?
Any help would be GREATLY
appreciated,
--James
----- Original Message -----
Sent: Saturday, September 15, 2007 5:17
AM
Subject: Re: Load
balancing question
What says your mod_jk status page ?
try to monitor during
the load to see if your workers are in error or OK state, il the max busy is
reached,....
Then look at your logs (mod_jk, apache, tomcat, webapps
logs, windows,...)
As said before, you should check the number of
tcp connections opened. If your do not use keep alive feature you can have a
bootleneck there (apache and tomcat servers).You can also have error like
max opened file reached.
Then look at the load average,system cpu,
iowait,..
You can also monitor your tomcats through JMX (using
jconsole or missioncontrol) to check that garbage collections works fine and
just don't hang up too long.
try to deactivate the 2 tomcat
instances on your apache server to see if httpd is still available after the
load test.
--
Bj
On 9/14/07, James
Sherwood <jsherwood@xxxxxxxxxxxxxxxx>
wrote:
Hello,
Everything
is Windows2003 Server.
After the load we cannot load pages either
through apache or by contacting
tomcat directly.
I beleive you
are on the right path tho, about connections not getting
released,
thats what I figure it is too but I do not know how to fix
it.
Thanks,
James
----- Original Message
-----
From: "AFrieze" <AFrieze@xxxxxxxxxxxx >
To:
<users@xxxxxxxxxxxxxxxx>
Sent:
Friday, September 14, 2007 12:02 PM
Subject: Re: Load
balancing question
>
>>
>> We also have
the problem of once the load stops, the sites are still down
>>
but Apache/tomcats still seem to be running fine. A restart
of
>> either(not even both) fixes the sites.
> A guess
>
> Your apache server is not releasing
connections. If you are running
> linux,
type "netstat -vat" into a terminal on your apache machine,
before
> and after you hit your server. See if the
connections are being released.
>
> You could also try typing
"ps -e | grep "httpd"" to see how many apache
> processes are being
run before/after. Look in the apache error log, etc.
>
You might find a clue like "MaxClients reached"
>
>
Question
> Are you able to log into all your tomcats(through port
8080) independent
> of apache and get served
requests? Can you log onto apache and get a
> statically
served page?
>
> Cheers
> AFrieze
>
>
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