It seems that you're using CDH so you might consider asking your question on cdh-user  mailing list instead for CDH specific issues.
It seems that your Tomcat instance has started, but the Sqoop application wasn't properly loaded. Would you mind sharing with us both tomcat and sqoop logs? They are usually available in:
On Fri, Mar 15, 2013 at 04:26:04PM +0200, hakki buyukcengiz wrote:
> Hi All,
> I have just installed the Sqoop 2 tool. I have done all the steps in
> After installation, "http://localhost:12000" address gives the result
> containing a string "Apache Sqoop ROOT". I understand from this string
> the server is running but when I request
> it gives:
> HTTP Status 404 -
> type Status report
> description The requested resource () is not available.
> Apache Tomcat/6.0.35
> Can you give advises about this error?
> My cdh properties:
> Hakki Buyukcengiz