There was a critical Java patch released yesterday: FP-Updater Tool addressing this bug: CVE-2010-4476 Released.
The bug was around Java inability to parse the following double numbers : 2.2250738585072012e-308 or 2.2250738585072011e-308 - parsing these numbers will result in Java thread hanging indefinitely.
This bug unfortunately affects ColdFusion sites as well, below are two useful blog posts that I found:
- [http://www.petefreitag.com/item/785.cfm](http://www.petefreitag.com/item/785.cfm)
- [http://www.cfconsultant.com/blog/2011/02/09/cve-2010-4476-coldfusion-java-hangs-when-converting-2-2250738585072012e-308-or-2-2250738585072011e-308/](http://www.cfconsultant.com/blog/2011/02/09/cve-2010-4476-coldfusion-java-hangs-when-converting-2-2250738585072012e-308-or-2-2250738585072011e-308/)
Short term fix, would be to patch Java. Longer term would be to wait for Java upgrade, which should be 1.6.0_24.