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This commit is contained in:
unknown
2003-03-16 19:17:54 +02:00
parent 59bf6f6ea5 bfbb0ad69d
commit a821703912
196 changed files with 11754 additions and 904 deletions
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38
sql/repl_failsafe.cc
View File

@ -449,8 +449,33 @@ int show_new_master(THD* thd)
}
}
/*
Asks the master for the list of its other connected slaves.
This is for failsafe replication :
in order for failsafe replication to work, the servers involved in replication
must know of each other. We accomplish this by having each slave report to the
master how to reach it, and on connection, each slave receives information
about where the other slaves are.
int update_slave_list(MYSQL* mysql)
SYNOPSIS
update_slave_list()
mysql pre-existing connection to the master
mi master info
NOTES
mi is used only to give detailed error messages which include the
hostname/port of the master, the username used by the slave to connect to
the master.
If the user used by the slave to connect to the master does not have the
REPLICATION SLAVE privilege, it will pop in this function because SHOW SLAVE
HOSTS will fail on the master.
RETURN VALUES
1 error
0 success
*/
int update_slave_list(MYSQL* mysql, MASTER_INFO* mi)
{
MYSQL_RES* res=0;
MYSQL_ROW row;
@ -462,7 +487,7 @@ int update_slave_list(MYSQL* mysql)
if (mc_mysql_query(mysql,"SHOW SLAVE HOSTS",16) ||
!(res = mc_mysql_store_result(mysql)))
{
error = "Query error";
error= mc_mysql_error(mysql);
goto err;
}
@ -476,7 +501,8 @@ int update_slave_list(MYSQL* mysql)
port_ind=4;
break;
default:
error = "Invalid number of fields in SHOW SLAVE HOSTS";
error= "the master returned an invalid number of fields for SHOW SLAVE \
HOSTS";
goto err;
}
@ -494,7 +520,7 @@ int update_slave_list(MYSQL* mysql)
{
if (!(si = (SLAVE_INFO*)my_malloc(sizeof(SLAVE_INFO), MYF(MY_WME))))
{
error = "Out of memory";
error= "the slave is out of memory";
pthread_mutex_unlock(&LOCK_slave_list);
goto err;
}
@ -518,7 +544,9 @@ err:
mc_mysql_free_result(res);
if (error)
{
sql_print_error("Error updating slave list: %s",error);
sql_print_error("While trying to obtain the list of slaves from the master \
'%s:%d', user '%s' got the following error: '%s'",
mi->host, mi->port, mi->user, error);
DBUG_RETURN(1);
}
DBUG_RETURN(0);