2011/2/1 Jonathan Ellis : > It is initialized after processing Thrift connections More generally, various MBeans become available at different parts of the startup process. If, just after startup, one that "should" be there is "missing," most of the time you probably just have to wait for it to be loaded. This appllies to most of the MBeans used by nodetool, which can cause otherwise scary exceptions when you run it against a (re)starting node which hasn't loaded the relevant MBean yet.. =Rob