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Posted to users@tomcat.apache.org by André Warnier <aw...@ice-sa.com> on 2012/05/16 17:43:08 UTC
Re: [OT] tomcat slowing down
Mikolaj Rydzewski wrote:
> On 16.05.2012 17:11, André Warnier wrote:
>> Mikolaj Rydzewski wrote:
>>> It looks you have some ajax requests
>>
>> Just curious : how do you see that from the OP's stack trace ?
>
> Just a guess, maybe I'm wrong:
>
> org.ajax4jsf.framework.ajax.AjaxViewRoot.processEvents(AjaxViewRoot.java:180)
>
> at
> org.ajax4jsf.framework.ajax.AjaxViewRoot.broadcastEvents(AjaxViewRoot.java:158)
>
> at
> org.ajax4jsf.framework.ajax.AjaxViewRoot.processDecodes(AjaxViewRoot.java:274)
>
>
Oh. I always thought that Ajax was purely a client-side thing (Asynchronous Javascript etc..).
Maybe this is only a name coincidence ?
From a server point of view, there should not be anything special distinguishing
Ajax-triggered requests from others, not so ?
Of course, perhaps one has one of these nifty real-time Ajax-driven popups which poll the
server every 0.1 second for an update to some graphic gimmick..
Which would of course provide some clue as to a gradual slowdown of some webserver, as the
poor thing struggles to keep up.
Mere loose and unfounded speculation of course, on the base of at best flimsy evidence.
Let's wait to see what the real data says.
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RE: [OT] tomcat slowing down
Posted by "Caldarale, Charles R" <Ch...@unisys.com>.
> From: Pid [mailto:pid@pidster.com]
> Subject: Re: [OT] tomcat slowing down
> > I was looking at "Wicket" in Wikipedia,
> That sir, is because you are not an Englishman. However, I can assure
> you, that we are very familiar with the wicket. What ho'!
Howzat?
- Chuck
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Re: [OT] tomcat slowing down
Posted by André Warnier <aw...@ice-sa.com>.
Pid wrote:
> On 16/05/2012 18:01, André Warnier wrote:
>> Christopher Schultz wrote:
>>> -----BEGIN PGP SIGNED MESSAGE-----
>>> Hash: SHA1
>>>
>>> André,
>>>
>>> On 5/16/12 11:43 AM, André Warnier wrote:
>>>> Oh. I always thought that Ajax was purely a client-side thing
>>>> (Asynchronous Javascript etc..). Maybe this is only a name
>>>> coincidence ?
>>> There are libraries that make accepting Ajax requests easier (e.g.
>>> parsing XML, unpacking JSON objects, etc.). So one could call this
>>> "Ajax support" I suppose.
>>>
>> I was looking at "Wicket" in Wikipedia,
>
> That sir, is because you are not an Englishman. However, I can assure
> you, that we are very familiar with the wicket. What ho'!
Well exactly. The only familiarity I previously had with the word "wicket", was as some
bit of wood carefully balanced on top of two other bits of wood, with some white-attired
gentleman armed with another (wider) piece of wood in front, seemingly very anxious not to
let another bloke viciously toss the first bit of wood off the second ones by means of
something looking like a bigger golf ball. And of course as a term in the mysterious kind
of point-scoring ritual that goes with the same, along with other keywords like "inning",
"not outs" and such.
So, in my mind - before I consulted Wikipedia - I had this picture of some kind of graphic
browser applet, mostly popular in the UK and Indian markets, which one could use to
superimpose the lastest results of such games worldwide upon one's professional workspace,
with real-time updates.
But then, from previous experience watching the game on TV, I still could not quite figure
out how even the real-time updates of 10 simultaneous tournaments for tens of users, could
possibly overwhelm a Tomcat server, given the apparent pace of said game.
So that is why I checked Wikipedia, to see if my understanding was sufficient.
And to my utter relief, I realised it wasn't, and that the word wicket also seemed to
cover some client-server software architectural feature, where indeed data may be
exchanged by means of Ajax calls and such, but the data in question could be related to
faster-moving matters, thus validating my initial suspicions, after a fashion.
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Re: [OT] tomcat slowing down
Posted by Pid <pi...@pidster.com>.
On 16/05/2012 18:01, André Warnier wrote:
> Christopher Schultz wrote:
>> -----BEGIN PGP SIGNED MESSAGE-----
>> Hash: SHA1
>>
>> André,
>>
>> On 5/16/12 11:43 AM, André Warnier wrote:
>>> Oh. I always thought that Ajax was purely a client-side thing
>>> (Asynchronous Javascript etc..). Maybe this is only a name
>>> coincidence ?
>>
>> There are libraries that make accepting Ajax requests easier (e.g.
>> parsing XML, unpacking JSON objects, etc.). So one could call this
>> "Ajax support" I suppose.
>>
> I was looking at "Wicket" in Wikipedia,
That sir, is because you are not an Englishman. However, I can assure
you, that we are very familiar with the wicket. What ho'!
p
> and although much of that is
> unfamiliar to me, it sounds like there might indeed be DHTML and Ajax
> components involved.
> Now I also can't imagine that someone would release an application that
> brings a server down to its knees with 10 users, but maybe some
> misconfiguration can achieve that.
>
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[key:62590808]
Re: [OT] tomcat slowing down
Posted by André Warnier <aw...@ice-sa.com>.
Christopher Schultz wrote:
> -----BEGIN PGP SIGNED MESSAGE-----
> Hash: SHA1
>
> André,
>
> On 5/16/12 11:43 AM, André Warnier wrote:
>> Oh. I always thought that Ajax was purely a client-side thing
>> (Asynchronous Javascript etc..). Maybe this is only a name
>> coincidence ?
>
> There are libraries that make accepting Ajax requests easier (e.g.
> parsing XML, unpacking JSON objects, etc.). So one could call this
> "Ajax support" I suppose.
>
I was looking at "Wicket" in Wikipedia, and although much of that is unfamiliar to me, it
sounds like there might indeed be DHTML and Ajax components involved.
Now I also can't imagine that someone would release an application that brings a server
down to its knees with 10 users, but maybe some misconfiguration can achieve that.
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Re: [OT] tomcat slowing down
Posted by Christopher Schultz <ch...@christopherschultz.net>.
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Hash: SHA1
André,
On 5/16/12 11:43 AM, André Warnier wrote:
> Oh. I always thought that Ajax was purely a client-side thing
> (Asynchronous Javascript etc..). Maybe this is only a name
> coincidence ?
There are libraries that make accepting Ajax requests easier (e.g.
parsing XML, unpacking JSON objects, etc.). So one could call this
"Ajax support" I suppose.
- -chris
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RE: [OT] tomcat slowing down
Posted by "Caldarale, Charles R" <Ch...@unisys.com>.
> From: André Warnier [mailto:aw@ice-sa.com]
> Subject: Re: [OT] tomcat slowing down
> I always thought that Ajax was purely a client-side thing
It may be so in this case as well - the stack traces include use of HttpClient, so the webapp may actually be hung up waiting on some external resource.
- Chuck
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