Buffer-the system has never succeeded during scheduled backup. you cannot read the mysql error log.

1509091: 59: 00 [Note] C: Warning: Normalshutdown1509091: 59: 00 [Note] eventsched.pdf: Purgingthequeue.1events1509091: 59: 00 InnoDB: Startingshutdown... 1509091: 59: 00 InnoDB: Shutdowncompleted; log... buffermysqlsocket backup initialization

150909 1:59:00 [Note] C: \ Program Files \ MySQL Server 5.5 \ bin \ mysqld: Normal shutdown

150909 1:59:00 [Note] Event schedents: Purging the queue. 1 events
150909 1:59:00 InnoDB: Starting shutdown...
150909 1:59:00 InnoDB: Shutdown completed; log sequence number 183602652
150909 1:59:00 [Note] C: \ Program Files \ MySQL Server 5.5 \ bin \ mysqld: Shutdown complete

150909 1:59:02 [Note] Plugin 'Federated 'is disabled.
150909 1:59:02 InnoDB: The InnoDB memory heap is disabled
150909 1:59:02 InnoDB: Mutexes and rw_locks use Windows interlocked functions
150909 1:59:02 InnoDB: Compressed tables use zlib 1.2.3
150909 1:59:02 InnoDB: Initializing buffer pool, size = 339.0 M
150909 1:59:02 InnoDB: Completed initialization of buffer pool
150909 1:59:02 InnoDB: highest supported file format is Barracuda.
150909 1:59:03 InnoDB: Waiting for the background threads to start
150909 1:59:04 InnoDB: 5.5.37 started; log sequence number 183602652
150909 1:59:04 [Note] Server hostname (bind-address): '0. 0.0.0 '; port: 3306
150909 1:59:04 [Note]-'0. 0.0.0 'resolves to '0. 0.0.0 ';
150909 1:59:04 [Note] Server socket created on IP: '0. 0.0.0 '.
150909 1:59:04 [Note] Event Scheduler: Loaded 1 event
150909 1:59:04 [Note] C: \ Program Files \ MySQL Server 5.5 \ bin \ mysqld: ready for connections.
Version: '5. 5.37 'socket: ''port: 3306 MySQL Community Server (GPL)