loadsim-users Mailing List for Web Application Load Simulator (Page 2)

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Hello.

I've followed the procedures to record a web session.  I select the file to
save to.  I run the web app.  Data appears in the muffin.loadsim window,
but does not get saved to a file.

Hello all.

I've just downloaded loadsim, and set it up.  I have a couple of questions.

a) Is this still a viable product?  The last release was made several
months ago.

b) any know bugs/ issues?

c) is it easy to extend / are there any extensions for it that people have
created?

Thanks!

If you mean stuff like the HTTP headers and such, there is no way to do
that "out of the box". 

You can modify org.openware.loadsim.link.Link to do this.  In the
'sample' method is where the communication between client and web server
takes place.  You could modify this to output anything you want.

If you just want the contents of the page you can use the content
handlers.  Unfortunately, the content handler interface that you can
implement has no way to get the HTTP header information.  That would be
the logical place to support your functionality.  Maybe modify that to
also take the HTTP header information.

-vince

On Wed, 2001-10-31 at 04:36, sandeep kshirsagar wrote:
> Hi,
> Thanks for your quick reply. I could find this
> solution by looking in the code. I do agree with the
> answer.
>  
> I want to ask one more question.
> Is it possible to log/dump http data in a file, when
> running the simulation?
> We need this because we want to extend loadsim for
> testing the functionality of a web-site. 
> The idea is to record set of test sequence and run the
> simulator. Now check the dump log file for proper
> response. 
> 
> Any other suggestion is also welcome.
> 
> regards
> Sandeep
> 
> 
> --- Vincent Sheffer <vsh...@op...> wrote:
> > You cannot record in SSL mode.
> > 
> > SSL is meant to encrypt the HTTP stream between the
> > client and server. 
> > The only thing that can decrypt the stream (which
> > the recorder needs to
> > be able to do) is the server and your browser. 
> > Think of it this way: if
> > all you have to do to break SSL encryption is put a
> > proxy server (which
> > is all the recorder is) in between a browser and the
> > webserver then
> > HTTPS wouldn't be very secure.
> > 
> > What you have to do is record using HTTP.  You can
> > do the playback (the
> > load test) using HTTPS (that is where the jar file
> > comes in) but you
> > will need to edit the resulting recorded session and
> > replace all
> > occurences of 'http' with https.
> > 
> > One last thing:  the only JVM that I know loadsim
> > will work with is JDK
> > 1.3.0.
> > 
> > Hope that helps.
> > Vince 
> > 
> > On Tue, 2001-10-30 at 03:10, sandeep kshirsagar
> > wrote:
> > > Hi,
> > > 
> > > I am new to loadsim. I am using loadsim for
> > recording
> > > the http & https. 
> > > loadsim when run in record mode, works fines with
> > http
> > > request. But when SSL based request comes, it does
> > not
> > > work. 
> > > Working with SSL, you mention to load the jar
> > files in
> > > loadsim lib directory and you should see a message
> > > that says SSL has been enabled.
> > > I copied the jar files, but when I start the 
> > > loadsim --record
> > > it does not show any message for SSL. 
> > > I want to know how to enable SSL while recording?
> > > Do I need do set some option?
> > > 
> > > I do get the message for SSL when I run the
> > recorded
> > > sequence file by loadsim --startconsole
> > > 
> > > Please reply asap.
> > > Thanks & Regards
> > > Sandeep Kshirsagar
> > > 
> > > 
> > > __________________________________________________
> > > Do You Yahoo!?
> > > Make a great connection at Yahoo! Personals.
> > > http://personals.yahoo.com
> > > 
> > > _______________________________________________
> > > Loadsim-users mailing list
> > > Loa...@li...
> > >
> >
> https://lists.sourceforge.net/lists/listinfo/loadsim-users
> > > 
> > 
> > 
> 
> 
> __________________________________________________
> Do You Yahoo!?
> Make a great connection at Yahoo! Personals.
> http://personals.yahoo.com
> 
> _______________________________________________
> Loadsim-users mailing list
> Loa...@li...
> https://lists.sourceforge.net/lists/listinfo/loadsim-users
> 

Hi,
Thanks for your quick reply. I could find this
solution by looking in the code. I do agree with the
answer.

I want to ask one more question.
Is it possible to log/dump http data in a file, when
running the simulation?
We need this because we want to extend loadsim for
testing the functionality of a web-site. 
The idea is to record set of test sequence and run the
simulator. Now check the dump log file for proper
response. 

Any other suggestion is also welcome.

regards
Sandeep

--- Vincent Sheffer <vsh...@op...> wrote:
> You cannot record in SSL mode.
> 
> SSL is meant to encrypt the HTTP stream between the
> client and server. 
> The only thing that can decrypt the stream (which
> the recorder needs to
> be able to do) is the server and your browser. 
> Think of it this way: if
> all you have to do to break SSL encryption is put a
> proxy server (which
> is all the recorder is) in between a browser and the
> webserver then
> HTTPS wouldn't be very secure.
> 
> What you have to do is record using HTTP.  You can
> do the playback (the
> load test) using HTTPS (that is where the jar file
> comes in) but you
> will need to edit the resulting recorded session and
> replace all
> occurences of 'http' with https.
> 
> One last thing:  the only JVM that I know loadsim
> will work with is JDK
> 1.3.0.
> 
> Hope that helps.
> Vince 
> 
> On Tue, 2001-10-30 at 03:10, sandeep kshirsagar
> wrote:
> > Hi,
> > 
> > I am new to loadsim. I am using loadsim for
> recording
> > the http & https. 
> > loadsim when run in record mode, works fines with
> http
> > request. But when SSL based request comes, it does
> not
> > work. 
> > Working with SSL, you mention to load the jar
> files in
> > loadsim lib directory and you should see a message
> > that says SSL has been enabled.
> > I copied the jar files, but when I start the 
> > loadsim --record
> > it does not show any message for SSL. 
> > I want to know how to enable SSL while recording?
> > Do I need do set some option?
> > 
> > I do get the message for SSL when I run the
> recorded
> > sequence file by loadsim --startconsole
> > 
> > Please reply asap.
> > Thanks & Regards
> > Sandeep Kshirsagar
> > 
> > 
> > __________________________________________________
> > Do You Yahoo!?
> > Make a great connection at Yahoo! Personals.
> > http://personals.yahoo.com
> > 
> > _______________________________________________
> > Loadsim-users mailing list
> > Loa...@li...
> >
>
https://lists.sourceforge.net/lists/listinfo/loadsim-users
> > 
> 
> 

__________________________________________________
Do You Yahoo!?
Make a great connection at Yahoo! Personals.
http://personals.yahoo.com

You cannot record in SSL mode.

SSL is meant to encrypt the HTTP stream between the client and server. 
The only thing that can decrypt the stream (which the recorder needs to
be able to do) is the server and your browser.  Think of it this way: if
all you have to do to break SSL encryption is put a proxy server (which
is all the recorder is) in between a browser and the webserver then
HTTPS wouldn't be very secure.

What you have to do is record using HTTP.  You can do the playback (the
load test) using HTTPS (that is where the jar file comes in) but you
will need to edit the resulting recorded session and replace all
occurences of 'http' with https.

One last thing:  the only JVM that I know loadsim will work with is JDK
1.3.0.

Hope that helps.
Vince 

On Tue, 2001-10-30 at 03:10, sandeep kshirsagar wrote:
> Hi,
> 
> I am new to loadsim. I am using loadsim for recording
> the http & https. 
> loadsim when run in record mode, works fines with http
> request. But when SSL based request comes, it does not
> work. 
> Working with SSL, you mention to load the jar files in
> loadsim lib directory and you should see a message
> that says SSL has been enabled.
> I copied the jar files, but when I start the 
> loadsim --record
> it does not show any message for SSL. 
> I want to know how to enable SSL while recording?
> Do I need do set some option?
> 
> I do get the message for SSL when I run the recorded
> sequence file by loadsim --startconsole
> 
> Please reply asap.
> Thanks & Regards
> Sandeep Kshirsagar
> 
> 
> __________________________________________________
> Do You Yahoo!?
> Make a great connection at Yahoo! Personals.
> http://personals.yahoo.com
> 
> _______________________________________________
> Loadsim-users mailing list
> Loa...@li...
> https://lists.sourceforge.net/lists/listinfo/loadsim-users
> 

Hi,

I am new to loadsim. I am using loadsim for recording
the http & https. 
loadsim when run in record mode, works fines with http
request. But when SSL based request comes, it does not
work. 
Working with SSL, you mention to load the jar files in
loadsim lib directory and you should see a message
that says SSL has been enabled.
I copied the jar files, but when I start the 
loadsim --record
it does not show any message for SSL. 
I want to know how to enable SSL while recording?
Do I need do set some option?

I do get the message for SSL when I run the recorded
sequence file by loadsim --startconsole

Please reply asap.
Thanks & Regards
Sandeep Kshirsagar

__________________________________________________
Do You Yahoo!?
Make a great connection at Yahoo! Personals.
http://personals.yahoo.com

Sorry for the delay, Bob, but I've been on vacation.

If you haven't already found a solution or haven't already gotten fed up and
moved on to something else, it would help to have your results.csv file.  If
the information contained is too sensitive to send to me I certainly understand.
(NOTE: if you send it to me send it directly to my vsh...@op... address,
not the loadsim users mailing list).

I just did a very simple test against google and loadsim_pub worked fine for
me.

The one thing I can think of is if your results.csv file was created by an earlier
version of loadsim then the loadsim_pub won't work.  This is because an extra
column has been introduced into the CSV file that tells which load driver host
produced the result.  This would throw off what the publish system is expecting
in that file.

-vince

>Hello
>
>     Just downloaded this software. Got it to generate me a
>report.csv file. However, I can't generate the html from publish.
>
>     I did the following:
>
>bash-2.05$ loadsim_pub results.csv -html -h
>loadsim publish version 0.9.5
>Exception in thread "main" java.lang.NumberFormatException: text/html;charset=utf-8

>        at java.lang.FloatingDecimal.readJavaFormatString(FloatingDecimal.java:1176)

>        at java.lang.Double.valueOf(Double.java:168)
>        at java.lang.Double.<init>(Double.java:240)
>        at org.openware.loadsim.stats.SampleSet.<init>(SampleSet.java:64)
>        at org.openware.loadsim.stats.Stats.main(Stats.java:418)
>
>--
>
>I have downloaded CVS but had some java problems (didn't get this
>far).
>
>Please let me know what I'm doing wrong. It seems to me that the
>Java code is tring to interpret text/html;charset=utf-8 as a Decimal
>which is wrong, but ???
>
>Bob
>-- 
>Non-Determinism is not meant to be reasonable.
>		-- M.J. 0'Donnell
>
>_______________________________________________
>Loadsim-users mailing list
>Loa...@li...
>http://lists.sourceforge.net/lists/listinfo/loadsim-users
>
>

Hello

     Just downloaded this software. Got it to generate me a
report.csv file. However, I can't generate the html from publish.

     I did the following:

bash-2.05$ loadsim_pub results.csv -html -h
loadsim publish version 0.9.5
Exception in thread "main" java.lang.NumberFormatException: text/html;charset=utf-8
        at java.lang.FloatingDecimal.readJavaFormatString(FloatingDecimal.java:1176)
        at java.lang.Double.valueOf(Double.java:168)
        at java.lang.Double.<init>(Double.java:240)
        at org.openware.loadsim.stats.SampleSet.<init>(SampleSet.java:64)
        at org.openware.loadsim.stats.Stats.main(Stats.java:418)

--

I have downloaded CVS but had some java problems (didn't get this
far).

Please let me know what I'm doing wrong. It seems to me that the
Java code is tring to interpret text/html;charset=utf-8 as a Decimal
which is wrong, but ???

Bob
-- 
Non-Determinism is not meant to be reasonable.
		-- M.J. 0'Donnell

On 05/04/2001 05:26:46 PM, vinny wrote:
> If you look in the file created during the record session do you
> see the link that you are supposed to be redirected to?

Yes, I do see that, so it looks like it handled the
redirect.
I can't get you access to a public server for
a few days (it's being reinstalled w/ the latest
code).  In the meantime, I'll try the page capture
filter.

 ken

I just tried it on an application that we have that uses redirect and it works
fine, at least in record mode.  That is, it successfully records the URL for
the redirect.

If you look in the file created during the record session do you   see the link
that you are supposed to be redirected to?  If so, then LoadSim should "play"
it back for you.  Basically, LoadSim is pretty stupid and will just blindly
follow any link in your sequence file.

-vince
>
>Does loadsim work when run against an IIS/ASP web site?
>The problem I'm having is that the simulation.xml file
>runs, but doesn't work as expected.  What I do in this
>simple recorded test is:
>1) log into ASP site (session authentication is used)
>2) create a user by posting a form
>3) log out
>
>The loadsim user seems to log in successfully, but
>never seems to log out.  It also doesn't successfully
>create a user, so it looks like it just fails to do anything
>after the first step.
>
>We also have a trace log for our web objects.
>The last thing it does is get the URL of the user's
>"home page".  After the login is done, the server
>gives the browser a redirect.  While recording
>the session, I did notice that loadsim printed out
>messages about ignoring 304 commands (the
>redirects).  Does it barf if it encounters a redirect?
>
>Any idea on the best way to find out what's going
>wrong?
>
> thanks,
>
> ken
>
>
>
>_______________________________________________
>Loadsim-users mailing list
>Loa...@li...
>http://lists.sourceforge.net/lists/listinfo/loadsim-users
>
>

Does loadsim work when run against an IIS/ASP web site?
The problem I'm having is that the simulation.xml file
runs, but doesn't work as expected.  What I do in this
simple recorded test is:
1) log into ASP site (session authentication is used)
2) create a user by posting a form
3) log out

The loadsim user seems to log in successfully, but
never seems to log out.  It also doesn't successfully
create a user, so it looks like it just fails to do anything
after the first step.

We also have a trace log for our web objects.
The last thing it does is get the URL of the user's
"home page".  After the login is done, the server
gives the browser a redirect.  While recording
the session, I did notice that loadsim printed out
messages about ignoring 304 commands (the
redirects).  Does it barf if it encounters a redirect?

Any idea on the best way to find out what's going
wrong?

 thanks,

 ken

Alright, here is the history...

When I first starting working on this about 1 1/2 ago, I was jusing JDK 1.1.8.
 The implementation of the HTTP client code flat out didn't work (I forget exactly
what the problem was, but it simply didn't work).  So, I hunted around and found
HTTPClient, which using the property that you give, did work.  At the job that
I was doing when I first used LoadSim I only simulated up to around 80 users
(only about 20 per machine).  HTTPClient worked fine.  

More recently, however, I used LoadSim simulating much large numbers of users
(upwards of 200 per machine).  HTTPClient started breaking down and not working
very well.  So, I decided to see if the JDK 1.3 (which is the JDK I use now
exclusively -- we use Weblogic instead of Websphere) had improved their HTTP
client implementation.  To my surprise and happiness it was markedly better.
 So, now, by default, LoadSim uses the built-in HTTP client implementation (which,
for that reason, I would recommend using JDK 1.3 for running simulations). 
LoasSim still ships with HTTPClient, which you should be able to use.

Now, for those interested, the version of HTTPClient that I use is from over
a year ago.  Maybe newer versions work better.  If you'd like to try a new version
check out the link to the HTTPClient site in the acknowledgements section of
the LoadSim homepage (I think LoadSim ships with 0.3.1 and the newer version
is 0.3.2).

Well, that is probably about as cleas as mud, wouldn't you say?
>
>
>On 04/18/2001 03:27:31 PM, vinny wrote:
>> It looks like JDK 1.3 is the first version of the JDK that has a good
>> implementation of the HTTP client code.
>
>But shouldn't the built-in http code from running it this
>way have worked?
>java -classpath $LOADSIM_HOME/lib/loadsim.jar
>-Djava.protocol.handler.pkgs=HTTPClient org.openware.loadsim.LoadSim
>
>I'll confirm when I get JDK1.3 on my
>current system.  Tied up w/ performance
>tweaking now.
>
>
> ken
>
>
>_______________________________________________
>Loadsim-users mailing list
>Loa...@li...
>http://lists.sourceforge.net/lists/listinfo/loadsim-users
>
>

On 04/18/2001 03:27:31 PM, vinny wrote:
> It looks like JDK 1.3 is the first version of the JDK that has a good
> implementation of the HTTP client code.

But shouldn't the built-in http code from running it this
way have worked?
java -classpath $LOADSIM_HOME/lib/loadsim.jar
-Djava.protocol.handler.pkgs=HTTPClient org.openware.loadsim.LoadSim

I'll confirm when I get JDK1.3 on my
current system.  Tied up w/ performance
tweaking now.

 ken

On 04/17/2001 01:46:15 AM, Vincent Sheffer wrote:
> After typing 'start' I get "Started simulation on
> '//localhost:8000".  Do you get that message?
> To get the Tcl prompt back you do need to hit the return key.

Yes, I do get this.  The copy/paste I sent you shows the
TCL prompt.

> using the simulation.xml that I sent you a couple of days ago?

I modified it to do just 5 iterations w/ 1 user to
make sure I see the Stop msg more quickly.

I just tried it on a different machine w/ Sun
JDK 1.3_02 (the latest Win32 one).  It does stop
properly on that one.  I'll try a different JDK on
my system.  It's a bummer that it doesn't work
on 1.2.2 because that is my main Java development
environment (VisualAge for Java w/ Websphere)...

 ken

I've just tried it again with the simulation.xml file that I sent you.  

After typing 'start' I get "Started simulation on '//localhost:8000".  Do you
get that message?

To get the Tcl prompt back you do need to hit the return key.

I've also exited the simulation before it was over and it works fine.  LoadSim
has replaced the Tcl exit command with one of it's own to stop all of the other
simulations running.  This takes a few seconds, but you should see something to
the effect of:

Stopping simulation //localhost:8000
Simulation complete: remote host is '//localhost:8000': elapsed time is 00:01:30 ms

I've also tried the IBM JDK 1.3 (I run Linux), and I get the same behavior. 
Unfortunately, I don't have a JDK 1.2.2, so I am unable to try it (and it is
too late right now to download it).

I am troubled as to why you are having so much difficulty.  Are you using the
simulation.xml that I sent you a couple of days ago?  It should absolutely not
hang.  When I ran the simulation it did take somewhere around 10-20 minutes (I
didn't notice the elapsed time unfortunately) to complete, and there is no
feedback during the simulation, so it *will* look like it is just sitting there
doing nothing.

-vince

On Mon, 16 Apr 2001, ke...@ke... wrote:
> On 04/16/2001 03:37:21 PM, Vincent Sheffer wrote:
> > Try this:
> > java -classpath $LOADSIM_HOME/lib/loadsim.jar
> > -Djava.protocol.handler.pkgs=HTTPClient org.openware.loadsim.LoadSim
> 
> Behavior is exactly the same :-(
> It starts the simulation and never finishes.
> "Exit" hangs.
> I'll try upgrading my JDK to 1.3.  Can't think
> of anything else...
> 
> 
>  ken
> 
> 
> _______________________________________________
> Loadsim-users mailing list
> Loa...@li...
> http://lists.sourceforge.net/lists/listinfo/loadsim-users

On 04/16/2001 03:37:21 PM, Vincent Sheffer wrote:
> Try this:
> java -classpath $LOADSIM_HOME/lib/loadsim.jar
> -Djava.protocol.handler.pkgs=HTTPClient org.openware.loadsim.LoadSim

Behavior is exactly the same :-(
It starts the simulation and never finishes.
"Exit" hangs.
I'll try upgrading my JDK to 1.3.  Can't think
of anything else...

 ken

On 04/16/2001 01:41:26 PM, Vincent Sheffer wrote:
> Which JDK are you using?  I use JDK 1.3.  In the past, I've had
> problems with the HTTPConnection class in earlier JDKs.

Currently using IBM JDK 1.2.2 (needed for Websphere).
I'll try the 1.3 JDK though it will unfortunately break
Websphere :-P

> LoadSim also ships with something called HTTPClient,
> which is another, 3rd party implementation of the HTTP comms
> layer.  This worked better than the JDK 1.1.x implementations

How do you get loadsim to use this instead?  Should be
a quick way of finding out whether the JDK is the culprit.

 ken

On 04/16/2001 11:22:04 AM, Vincent Sheffer wrote:
> Typing stop should work.  I'll check into that.

The only thing I can think of is that it has something to
do w/ running on localhost since it sounds like you
don't run this way.  I shouldn't even need to type in
"stop" since I trivialized the sequence file by setting
it to only run 5 iterations using 1 user; this should have
taken a minute at most.

I'll switch to the standard distributed mode of running
after I get the test scripts captured and working on
my local dev machine.  I'll also try to set up loadsim
in a distributed mode to see if that's the culprit.

> When I ran the simulation with the 10 virtual users my CPU
> utilization was basically 0, with short bursts of around 40-50%

I have a dual Celeron 400 (Abit BP6 MB).  It'll go
to a dual 1Ghz Athlon after the motherboards
come out in another quarter or so.

> Is it the same simulation that we've exchanged before?

Yes.  That's obviously not the real app I will test.  I
just wanted to capture a few simple URLs and make
sure it works before investing more extensive time
into it (had bad experience w/ MS's web stress tool
and a few others where I put time in only to run into
a major roadblock later).

> the project, and maybe adding you as a developer

I have to be an experienced user first.  Can't add
new features w/o knowing how everything works :-)

 ken

Please put up a binary distribution on loadsim's
web page so we can download and try it quickly
instead of having to build it first.

I tried grabbing the sources w/ CVS under Win2K
and building, but ran into a lot of problems building
it.  I grabbed the latest Ant and XML libraries, but
that didn't help.

The build error is:
J:\Win32Dev\loadsim\build\build.xml:49: Cannot use classic compiler, as it
is no
t available A common solution is to set the environment variable JAVA_HOME
to yo
ur jdk directory.

I have the 1.2.2 JDK.  JAVA_HOME points to it
the right directory.  I can run javac on the
command line w/o problems.  I tried switching
the build.compiler to modern, but that
didn't work either.  :-P

 ken

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