question: public int checkBookiesUp ( int count , int timeout ) throws Exception { ZooKeeper zkc = connectZooKeeper ( zkHost , zkPort , zkTimeoutSec ) ; try { int mostRecentSize = 0 ; for ( int i = 0 ; i < timeout ; i ++ ) { try { List < String > children = zkc . getChildren ( "/ledgers/available" , false ) ; children . remove ( "readonly" ) ; mostRecentSize = children . size ( ) ; if ( ( mostRecentSize > count ) || LOG . isDebugEnabled ( ) ) { LOG . info ( "Found " + mostRecentSize + " bookies up, " + "waiting for " + count ) ; if ( ( mostRecentSize > count ) || LOG . isTraceEnabled ( ) ) { for ( String child : children ) { LOG . info ( " server: " + child ) ; } } } if ( mostRecentSize == count ) { break ; } } catch ( KeeperException e ) { } Thread . sleep ( 1000 ) ; } return mostRecentSize ; } finally { zkc . close ( ) ; } }
target:  Check that a number of bookies are available