why does jboss look for the /favicon.ico?

[jieshengz]

I have a very simple web application. I enabled RequestDumperValve for debug purpose. strangely, I found for every request, the server tries to request /favicon.ico. However there is no error is showed in the web browser. What does the /favicon.ico do? Can I disable it? Thanks

[ionel]

favicon.ico is the icon shown on the left-side of the URL on most browser address bar.

As this is not a required thing, it does not rise exception on the client.