Description:
CHANGE MASTER TO is not accepting relative path for relay_log_file without ./ prefixed onto log file name.
Setting relay_log=`host`-relay-bin does not have an impact.
Setting relay_log=/full/path/to/`host`-relay-bin
At a minimum this is a documentation bug since http://dev.mysql.com/doc/refman/5.1/en/change-master-to.html never mentions the "./relay-log-bin.000001" notation.
This behavior is mentioned also in Bug #42879 which received a fix pushed in 5.1.33 but is still "Verified"
How to repeat:
mysql> slave stop;
Query OK, 0 rows affected (0.00 sec)
mysql> show slave status\G
*************************** 1. row ***************************
Slave_IO_State:
Master_Host: 192.168.23.22
Master_User: repl
Master_Port: 3370
Connect_Retry: 60
Master_Log_File: silo-bin.000001
Read_Master_Log_Pos: 107
Relay_Log_File: silo-relay-bin.000002
Relay_Log_Pos: 4
Relay_Master_Log_File: silo-bin.000001
Slave_IO_Running: No
Slave_SQL_Running: No
[...]
mysql> change master to relay_log_file='silo-relay-bin.000003', relay_log_pos=0;
ERROR 1380 (HY000): Failed initializing relay log position: Could not find target log during relay log initialization
mysql> \! ls -l data/silo-relay-bin.000003
-rw-rw---- 1 matt matt 106 2010-07-21 16:16 data/silo-relay-bin.000003
mysql> show variables like 'relay%';
+-----------------------+----------------+
| Variable_name | Value |
+-----------------------+----------------+
| relay_log | |
| relay_log_index | |
| relay_log_info_file | relay-log.info |
| relay_log_purge | OFF |
| relay_log_space_limit | 0 |
+-----------------------+----------------+
5 rows in set (0.00 sec)
mysql> show variables like 'datadir';
+---------------+---------------------------------------+
| Variable_name | Value |
+---------------+---------------------------------------+
| datadir | /home/matt/mysql/sandbox/5.1.48/data/ |
+---------------+---------------------------------------+
1 row in set (0.00 sec)
mysql> show variables like 'basedir';
+---------------+-----------------------------+
| Variable_name | Value |
+---------------+-----------------------------+
| basedir | /data/mysql/sandbox/5.1.48/ |
+---------------+-----------------------------+
1 row in set (0.00 sec)
mysql> change master to relay_log_file='/home/matt/mysql/sandbox/5.1.48/data/silo-relay-bin.000003', relay_log_pos=0;
ERROR 1380 (HY000): Failed initializing relay log position: Could not find target log during relay log initialization
mysql> change master to relay_log_file='./silo-relay-bin.000003', relay_log_pos=0;
Query OK, 0 rows affected (0.00 sec)
mysql> slave start;
Query OK, 0 rows affected (0.00 sec)
mysql> show slave status\G
*************************** 1. row ***************************
Slave_IO_State: Waiting for master to send event
Master_Host: 192.168.23.22
Master_User: repl
Master_Port: 3370
Connect_Retry: 60
Master_Log_File: silo-bin.000001
Read_Master_Log_Pos: 107
Relay_Log_File: silo-relay-bin.000004
Relay_Log_Pos: 251
Relay_Master_Log_File: silo-bin.000001
Slave_IO_Running: Yes
Slave_SQL_Running: Yes
[...]
mysql> show slave status\G
*************************** 1. row ***************************
Slave_IO_State: Waiting for master to send event
Master_Host: 192.168.23.22
Master_User: repl
Master_Port: 3370
Connect_Retry: 60
Master_Log_File: silo-bin.000001
Read_Master_Log_Pos: 107
Relay_Log_File: silo-relay-bin.000007
Relay_Log_Pos: 251
Relay_Master_Log_File: silo-bin.000001
Slave_IO_Running: Yes
Slave_SQL_Running: Yes
[...]
mysql> slave stop;
Query OK, 0 rows affected (0.00 sec)
mysql> \! ls data
ibdata1 master.info silo-bin.000001 silo-bin.000004 silo.err silo-relay-bin.000006 test
ib_logfile0 mysql silo-bin.000002 silo-bin.000005 silo.err-old silo-relay-bin.000007
ib_logfile1 relay-log.info silo-bin.000003 silo-bin.index silo.pid silo-relay-bin.index
mysql> show variables like 'relay%';
+-----------------------+----------------------+
| Variable_name | Value |
+-----------------------+----------------------+
| relay_log | silo-relay-bin |
| relay_log_index | silo-relay-bin.index |
| relay_log_info_file | relay-log.info |
| relay_log_purge | ON |
| relay_log_space_limit | 0 |
+-----------------------+----------------------+
5 rows in set (0.00 sec)
mysql> change master to relay_log_file='silo-relay-bin.000006',relay_log_pos=0;
ERROR 1380 (HY000): Failed initializing relay log position: Could not find target log during relay log initialization
mysql> change master to relay_log_file='/data/mysql/sandbox/5.1.48/data/silo-relay-bin.000006', relay_log_pos=0;
ERROR 1380 (HY000): Failed initializing relay log position: Could not find target log during relay log initialization
mysql> change master to relay_log_file='./silo-relay-bin.000006', relay_log_pos=0;
Query OK, 0 rows affected (0.00 sec)
mysql> slave start;
Query OK, 0 rows affected (0.00 sec)
mysql> show slave status\G
*************************** 1. row ***************************
Slave_IO_State: Waiting for master to send event
Master_Host: 192.168.23.22
Master_User: repl
Master_Port: 3370
Connect_Retry: 60
Master_Log_File: silo-bin.000001
Read_Master_Log_Pos: 107
Relay_Log_File: silo-relay-bin.000006
Relay_Log_Pos: 251
Relay_Master_Log_File: silo-bin.000001
Slave_IO_Running: Yes
Slave_SQL_Running: Yes
[...]
With relay_log=/full/path/to/`host`-relay-bin
mysql> show slave status\G
*************************** 1. row ***************************
Slave_IO_State: Waiting for master to send event
Master_Host: 192.168.23.22
Master_User: repl
Master_Port: 3370
Connect_Retry: 60
Master_Log_File: silo-bin.000001
Read_Master_Log_Pos: 107
Relay_Log_File: silo-relay-bin.000011
Relay_Log_Pos: 251
Relay_Master_Log_File: silo-bin.000001
Slave_IO_Running: Yes
Slave_SQL_Running: Yes
[...]
mysql> slave stop sql_thread;
Query OK, 0 rows affected (0.00 sec)
mysql> flush logs;
\Query OK, 0 rows affected (0.45 sec)
mysql> \! ls data/silo-relay-bin*
data/silo-relay-bin.000010 data/silo-relay-bin.000011 data/silo-relay-bin.000012 data/silo-relay-bin.index
mysql> slave stop;
Query OK, 0 rows affected (0.00 sec)
mysql> show variables like 'relay%';
+-----------------------+------------------------------------------------------+
| Variable_name | Value |
+-----------------------+------------------------------------------------------+
| relay_log | /data/mysql/sandbox/5.1.48/data/silo-relay-bin |
| relay_log_index | /data/mysql/sandbox/5.1.48/data/silo-relay-bin.index |
| relay_log_info_file | relay-log.info |
[...]
mysql> change master to relay_log_file='silo-relay-bin.000011', relay_log_pos=0;
ERROR 1380 (HY000): Failed initializing relay log position: Could not find target log during relay log initialization
mysql> change master to relay_log_file='./silo-relay-bin.000011', relay_log_pos=0;
ERROR 1380 (HY000): Failed initializing relay log position: Could not find target log during relay log initialization
mysql> change master to relay_log_file='/data/mysql/sandbox/5.1.48/data/silo-relay-bin.000011', relay_log_pos=0;
Query OK, 0 rows affected (0.00 sec)
