I have 3 Virtual machines: c1: [mysqld] server_id=1 innodb_file_per_table log-bin=mysql1_binlog c2: slave of c1, donor for c3, future master of c3 [mysqld] server_id=2 innodb_file_per_table log-bin=mysql2_binlog relay-log=mysql2_relaylog innodb_recovery_update_relay_log=1 innodb_flush_log_at_trx_commit=0 log_slave_updates c3: new server, [mysqld] server_id=3 innodb_file_per_table log-bin=mysql3_binlog relay-log=mysql3_relaylog innodb_recovery_update_relay_log=1 innodb_flush_log_at_trx_commit=0 Steps to reproduce: 1) setup c1 with single innodb table 2) setup replication from c1(master) to c2(slave) 3) on c1 insert rows: start while true ; do mysql test -e 'insert x values(1000);' ; done 4) c2, send kill -9 to mysqld_safe & mysqld 5) copy /var/lib/mysql from c2 to c3 6) close connections via tcp 3306 from c3 to c1 7) start mysql on c2 8) start mysql on c3 9) on c3: stop slave; change master (not working) ; reset slave;change master; start slave; 9) check on c3 if replication is up&running 10) on c3 kill -9 on mysqld pid 11) replication is not working now on c3, because it wont to use relay log names from c2. SHOW SLAVE STATUS\G shows: Master_Log_File: mysql2_binlog.000015 Read_Master_Log_Pos: 211757 Relay_Log_File: mysql2_relaylog.000008 Relay_Log_Pos: 839409 Relay_Master_Log_File: mysql1_binlog.000002 InnoDB: Warning: innodb_overwrite_relay_log_info is enabled. Updates by other storage engines may not be synchronized. InnoDB: relay-log.info is detected. InnoDB: relay log: position 842094, file name ./mysql2_relaylog.000008 InnoDB: master log: position 2341964, file name mysql1_binlog.000002 InnoDB: Apply batch completed InnoDB: In a MySQL replication slave the last master binlog file InnoDB: position 2339279, file name mysql1_binlog.000002 InnoDB: and relay log file InnoDB: position 839409, file name ./mysql2_relaylog.000008 InnoDB: Last MySQL binlog file position 0 797205, file name ./mysql2_binlog.000014 Master_Log_File: mysql1_binlog.000002 Read_Master_Log_Pos: 2341964 Relay_Log_File: mysql2_relaylog.000008 Relay_Log_Pos: 839409 Relay_Master_Log_File: mysql1_binlog.000002 Slave_IO_Running: No Slave_SQL_Running: No Can't run change master: change master to master_host='192.168.2.148', master_user='repl', master_password='pass',master_log_file='mysql2_binlog.000014', master_log_pos=797205; 130412 21:40:26 [ERROR] Failed to open the relay log './mysql2_relaylog.000008' (relay_log_pos 839409) reset slave; now change master is working kill -9 to mysqld on new server 130412 21:42:05 [Note] Plugin 'FEDERATED' is disabled. InnoDB: Warning: innodb_overwrite_relay_log_info is enabled. Updates by other storage engines may not be synchronized. InnoDB: relay-log.info is detected. InnoDB: relay log: position 211907, file name ./mysql3_relaylog.000003 InnoDB: master log: position 211757, file name mysql2_binlog.000015 InnoDB: Apply batch completed InnoDB: In a MySQL replication slave the last master binlog file InnoDB: position 2339279, file name mysql1_binlog.000002 InnoDB: and relay log file InnoDB: position 839409, file name ./mysql2_relaylog.000008 InnoDB: Last MySQL binlog file position 0 797205, file name ./mysql2_binlog.000014 130412 21:42:05 InnoDB: Waiting for the background threads to start 130412 21:42:06 Percona XtraDB (http://www.percona.com) 5.5.30-rel30.2 started; log sequence number 8346274 InnoDB: relay-log.info was overwritten. 130412 21:42:06 [Note] Recovering after a crash using mysql3_binlog 130412 21:42:06 [Note] Starting crash recovery... 130412 21:42:06 [Note] Crash recovery finished. 130412 21:42:06 [ERROR] Failed to open the relay log './mysql2_relaylog.000008' (relay_log_pos 839409)