How to shut off Web Flow logging messages?

In a Spring Webflow I have a modal popup, which works fine. However, there is a logging message that gets printed every time the modal popup is launched and I am trying to shut it off so it does not fill up the server's log file.

I have not been able to figure out how to disable this logging message. Any ideas?

I am using versions:

Code:

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<webflow.version>2.1.1.RELEASE</webflow.version>
<spring.version>3.0.3.RELEASE</spring.version>

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Logging message I would like to silence:

Code:

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15:18:09.720 [18537968@qtp-13825521-2] WARN  o.s.w.mvc.view.FlowAjaxTilesView - An Ajax request was detected, but no fragments were specified to be re-rendered.  Falling back to full page render.  This can cause unpredictable results when processing the ajax response on the client.

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Quote:

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I have not been able to figure out how to disable this logging message. Any ideas?

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OK, you could override your own log .properties file to off the WARN message just for o.s.w.mvc.view.FlowAjaxTilesView

Perhaps I am confused, but the problem is that I cannot make this logging go away no matter what I try in my log4j.properties file. I suspect that it has to do with this being an AJAX javascript library and not going through log4j?