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From Deepak Shetty <>
Subject Re: Is there a sampler that can read a tomcat log file?
Date Mon, 02 Nov 2009 01:16:32 GMT
what are you trying to assert in the logs? Ideally your response and
response code should tell you everything you need to know.

You need not necessarily have to extend Jmeter (you could just have a JSP
page / code on tomcat ) which returns whatever you want (that is you don't
need any Special Log Sampler , any HTTP/Web Service sampler should work just
as well).


On Sun, Nov 1, 2009 at 5:06 PM, David Levine <> wrote:

> Hi,
> As part of my functional test, I'd like to assert that a particular line is
> present (or not present) in the tomcat log file for my application.  After
> looking around at the available samplers and other JMeter tricks, it doesn't
> look like there's a way to do this without writing code and extending
> JMeter.  Am I correct or is there a way to do this?
> OK, there's one kind of hacky way I thought of doing this, which is to
> write a web service that returns the tomcat log as an XML document, and then
> use an HTTP Request along with an XPath Extractor post processor, and look
> for the log line I'm looking for.  But that means I'd have to send back the
> whole log file every time, which could be huge - so I don't like that.
> So I was thinking of writing a new sampler, called maybe the Tomcat Log
> Sampler, that let's you specify a regex query for log lines that you're
> looking for, and then returns those as XML, so that you can use the XPath
> Extractor to pull the log lines you're looking for into a variable which you
> can then subsequently use.  The Tomcat Log Sampler would really just be a
> proxy for a new web service I'd write, that would need to be running on the
> tomcat web server.  The Tomcat Log Web Service would perform the actual
> query and return the results.  That way it could scale.
> OK, does this make any sense or am I way off somewhere?
> David

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