question: private boolean waitClusterPowerOffStateNotLessThan ( PowerOffState . State state , boolean checkNumOfControlNodes ) { long expireTime = System . currentTimeMillis ( ) + powerOffStateChangeTimeout ; while ( true ) { if ( coordinator . verifyNodesPowerOffStateNotBefore ( state , checkNumOfControlNodes ) ) { return true ; } sleep ( powerOffStateProbeInterval ) ; if ( System . currentTimeMillis ( ) >= expireTime ) { return false ; } } }
target:  Wait cluster power off state change to a state not less than specified state