-BEGIN PGP SIGNED MESSAGE-
Hash: SHA256
Jerry,
On 7/7/20 18:32, Jerry Malcolm wrote:
> I going to assume that the reason I have apache httpd in there is
> 'because I always have had it there' is not going to go over well
> as a good reason, huh?
I mean... if you want to do more work and
I going to assume that the reason I have apache httpd in there is
'because I always have had it there' is not going to go over well as a
good reason, huh? I used to use it to serve static files. But that is
pretty much taken over by S3 now. I still use it for the SSL stuff.
But that's primar
-BEGIN PGP SIGNED MESSAGE-
Hash: SHA256
Jerry,
On 7/7/20 16:50, Jerry Malcolm wrote:
> I'm setting up an environment that has the potential for a large
> number of simultaneous requests coming in. I have a basic Apache
> HTTPD with mod_jk talking to Tomcat, all on the same Amazon EC2
>
I'm setting up an environment that has the potential for a large number
of simultaneous requests coming in. I have a basic Apache HTTPD with
mod_jk talking to Tomcat, all on the same Amazon EC2 instance. From my
understanding, I have the potential of maxing out connections at httpd,
at mod_j
By the way, I had to back-burner this investigation due to other things
that have come up. When those are out of the way, I'll pick up where I left
off. Thanks for the discussion so far.
(I don't know anything about SNMP, etc., so I'm only following that thread
very loosely until I have time to co
Hi Chris
I still recommend SNMP, maybe I expressed myself incorrectly but Java SNMP
support is made for monitoring. I also provided a bad link, here is the
good one :
http://docs.oracle.com/javase/7/docs/technotes/guides/management/snmp.html
When using the right server, the SNMP will also provide
Aurelien,
On 11/2/15 5:54 PM, Aurélien Terrestris wrote:
> Either my reply was not read, or I'm surprised nobody is answering here.
>
> "1. Java doesn't directly support SNMP;"
>
> It does, officially : http://docs.oracle.com/javase/7/docs/technotes/guides/
> management/snmp.html and it's workin
Either my reply was not read, or I'm surprised nobody is answering here.
"1. Java doesn't directly support SNMP;"
It does, officially : http://docs.oracle.com/javase/7/docs/technotes/guides/
management/snmp.html and it's working pretty well with Tomcat besides being
easy to set up.
"2. If the
Chris,
I disagree in some way with you ;)
Instrumentation is difficult because you (as a developer ?) want to go
deep, but it is not necessary for a production team to go that deep to know
when something is going wrong. It's a developer challenge, and he could
choose to rely only on good logging.
Aurélien,
On 10/23/15 6:47 PM, Aurélien Terrestris wrote:
> "Live monitoring is the only way to go, unless you want your customers
> to surprise you with performance problems on your own site. :)"
>
> Monitoring, ok, but alerting is critical for large scale production
> environments.
Apologies..
Chris,
"Live monitoring is the only way to go, unless you want your customers
to surprise you with performance problems on your own site. :)"
Monitoring, ok, but alerting is critical for large scale production
environments. You mention JMX callbacks for alerting, but it would be worth
that you me
> I know mod_jk will complain if it can't
> make a connection or if there is a timeout... I suspect mod_proxy_http
> will do the same.
They both are supposed to log 502, while Tomcat will raise a "connection
reset by peer" when answering to an already closed connection.
Timeouts for both are buggy
Jamie,
On 10/21/15 2:37 PM, Jamie Jackson wrote:
> On Wed, Oct 21, 2015 at 1:03 PM, Christopher Schultz wrote:
>
>> Jamie,
>>
>>
>>
>> Your mostly-default will default to a maximum of 200
>> incoming connections with 200 threads to handle them. You are only using
>> 12, so something else must b
On Wed, Oct 21, 2015 at 1:03 PM, Christopher Schultz wrote:
> Jamie,
>
>
>
> Your mostly-default will default to a maximum of 200
> incoming connections with 200 threads to handle them. You are only using
> 12, so something else must be going on. You have no obvious limits on
> httpd, so you are
Jamie,
On 10/16/15 3:12 PM, Jamie Jackson wrote:
> On Tue, Oct 13, 2015 at 9:34 AM, Christopher Schultz <
> ch...@christopherschultz.net> wrote:
>
> Jamie,
>
> On 10/9/15 10:03 AM, Jamie Jackson wrote:
Here's the stack trace dump:
https://gist.github.com/jamiejackson/ca2a49d2c8afac4960
About the appearance of Jetty in the stack trace dump: It's part of
FusionReactor (the JVM monitor)--it uses Jetty to serve its interface.
Thanks,
Jamie
On Fri, Oct 16, 2015 at 3:12 PM, Jamie Jackson wrote:
>
>
> On Tue, Oct 13, 2015 at 9:34 AM, Christopher Schultz <
> ch...@christopherschultz.
On Tue, Oct 13, 2015 at 9:34 AM, Christopher Schultz <
ch...@christopherschultz.net> wrote:
> -BEGIN PGP SIGNED MESSAGE-
> Hash: SHA256
>
> Jamie,
>
> On 10/9/15 10:03 AM, Jamie Jackson wrote:
> > Here's the stack trace dump:
> > https://gist.github.com/jamiejackson/ca2a49d2c8afac496067
>
-BEGIN PGP SIGNED MESSAGE-
Hash: SHA256
Jamie,
On 10/9/15 10:03 AM, Jamie Jackson wrote:
> Here's the stack trace dump:
> https://gist.github.com/jamiejackson/ca2a49d2c8afac496067
>
> FWIW, I've been trying to come up with a reliable test case to
> trigger the problem, but I haven't nai
Here's the stack trace dump:
https://gist.github.com/jamiejackson/ca2a49d2c8afac496067
FWIW, I've been trying to come up with a reliable test case to trigger the
problem, but I haven't nailed it yet. I've suspected that it's related to
file (large or slow) HTTP file uploads, and that's what I was
Thanks, so far, everyone.
I do already have a JVM monitoring tool in action--FusionReactor. I'm not
very familiar with some of the other offerings, but FR has seemed
full-featured to me, so I'm going to continue with FR until I find out
if/that it's missing some key aspect.
I managed to trigger t
On Wed, Oct 7, 2015 at 11:59 PM, Aurélien Terrestris
wrote:
> Hi Jamie,
>
>
> If you enjoy live monitoring, you need to have a look on Christopher's
> presentation (
>
> http://events.linuxfoundation.org/sites/events/files/slides/Monitoring%20Apache%20Tomcat%20with%20JMX.pdf
> ) who posts ma
-BEGIN PGP SIGNED MESSAGE-
Hash: SHA256
Aurélien,
On 10/7/15 5:59 PM, Aurélien Terrestris wrote:
> when this happens you can do a thread-dump (kill -3 pid on Linux
> platforms) and you would see if there is a lock on JDBC objects, or
> anything else synchronized (from the Collections like
Hi Jamie,
when this happens you can do a thread-dump (kill -3 pid on Linux platforms)
and you would see if there is a lock on JDBC objects, or anything else
synchronized (from the Collections like Hashtable). Not easy for beginners
to understand a dump, but worth learning.
Very often an applicati
Hi Folks,
I had a server crash on Friday, and I had the following symptoms:
Response time worsened, and when I looked at my real-time monitoring (an
app called FusionReactor), I saw that the app *seemed* to be
single-threading (I only saw one request process at a time), then after a
few minutes,
24 matches
Mail list logo
