Created a simple maven web app, deployed onto a WildFly 8.0.0.Alpha2. The edited an index.html file and got
Error renaming D:\Dev\servers\wildfly-8.0.0.Alpha2\standalone\tmp\tmp8284536747609996823.html to D:\Dev\servers\wildfly-8.0.0.Alpha2\standalone\deployments\w.war\index.html.
This may be caused by your server's temporary deploy directory being on a different filesystem than the final destination.
You may adjust these settings in the server editor.
Obviously the filesystem is identical.