I've encountered a weird bug... not sure if its my fault or the the JVMs. Basically when running the latest version of datagenerator on a multi CPU Itanium box I get this exception thrown after a (seemingly random) period of time. This only happens on an Itanium machine. The other variable here is that because its Itanium I have to use the JRockit 1.5 JVM. The code seems to work fine on every other multi CPU environment I've tried... Has anyone else had this problem?