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BUG#11809016 - NO WAY TO DISCOVER AN INSTANCE IS NO LONGER A SLAVE FOLLOWING MYSQL BUG#28796

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Before BUG#28796, an empty host was used to identify that an instance was no
longer a slave. However, BUG#28796 changed this behavior and one cannot set
an empty host. Besides, a RESET SLAVE only cleans up information on the next
event to retrieve from the master, disables ssl and resets heartbeat period.
So a call to SHOW SLAVE STATUS after issuing a RESET SLAVE still returns some
valid information, such as host, port, user and password.

To fix this problem, we have introduced the command RESET SLAVE ALL that does
what a regular RESET SLAVE does and also clears host, port, user and password
information thus allowing users to identify when an instance is no longer a
slave.
This commit is contained in:
Alfranio Correia
2011-07-18 18:18:03 +01:00
parent 2014480096
commit c1d55fb255
8 changed files with 71 additions and 5 deletions
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sql/rpl_mi.h
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@ -62,6 +62,7 @@ class Master_info : public Slave_reporting_capability
Master_info(bool is_slave_recovery);
~Master_info();
bool shall_ignore_server_id(ulong s_id);
void clear_in_memory_info(bool all);
/* the variables below are needed because we can change masters on the fly */
char master_log_name[FN_REFLEN];
@ -113,7 +114,6 @@ class Master_info : public Slave_reporting_capability
DYNAMIC_ARRAY ignore_server_ids;
ulong master_id;
};
void init_master_log_pos(Master_info* mi);
int init_master_info(Master_info* mi, const char* master_info_fname,
const char* slave_info_fname,
bool abort_if_no_master_info_file,