public void stop ( ) { if ( stopRequested ) return ; stopRequested = true ; LOG . info ( "Stopping http server" ) ; try { if ( httpServer != null ) httpServer . stop ( ) ; } catch ( Exception e ) { LOG . error ( StringUtils . stringifyException ( e ) ) ; } LOG . info ( "Stopping namesystem" ) ; if ( namesystem != null ) namesystem . close ( ) ; LOG . info ( "Stopping emptier" ) ; if ( emptier != null ) emptier . interrupt ( ) ; LOG . info ( "Stopping rpc servers" ) ; if ( server != null ) server . stop ( ) ; if ( dnProtocolServer != null ) dnProtocolServer . stop ( ) ; LOG . info ( "Stopping metrics" ) ; if ( myMetrics != null ) { myMetrics . shutdown ( ) ; } LOG . info ( "Stopping namesystem mbeans" ) ; if ( namesystem != null ) { namesystem . shutdown ( ) ; } }
Stop all NameNode threads and wait for all to finish .