I just did a yum upgrade hudson to get the lastest version of hudson and when I went back to hudson in my browser my build history was almost all gone. I'm now only showing 30 builds when there should be 167 builds. I have looked on the file system and all the builds are there. The builds that should be there, ie. 31 - 167 don't have build.xml files in them.

Is there a way to restore those build.xml files if I don't have them on a back somewhere?