diff options
Diffstat (limited to 'sql/sql_plugin.cc')
| -rw-r--r-- | sql/sql_plugin.cc | 43 |
1 files changed, 43 insertions, 0 deletions
diff --git a/sql/sql_plugin.cc b/sql/sql_plugin.cc index d54326af7aa..9851cb2739a 100644 --- a/sql/sql_plugin.cc +++ b/sql/sql_plugin.cc @@ -1930,6 +1930,49 @@ bool mysql_uninstall_plugin(THD *thd, const LEX_STRING *name) goto err; } +#ifdef HAVE_REPLICATION + /* Block Uninstallation of semi_sync plugins (Master/Slave) + when they are busy + */ + char buff[20]; + /* + Master: If there are active semi sync slaves for this Master, + then that means it is busy and rpl_semi_sync_master plugin + cannot be uninstalled. To check whether the master + has any semi sync slaves or not, check Rpl_semi_sync_master_cliens + status variable value, if it is not 0, that means it is busy. + */ + if (!strcmp(name->str, "rpl_semi_sync_master") && + get_status_var(thd, + plugin->plugin->status_vars, + "Rpl_semi_sync_master_clients",buff) && + strcmp(buff,"0") ) + { + sql_print_error("Plugin 'rpl_semi_sync_master' cannot be uninstalled now. " + "Stop any active semisynchronous slaves of this master " + "first.\n"); + my_error(ER_UNKNOWN_ERROR, MYF(0), name->str); + goto err; + } + /* Slave: If there is semi sync enabled IO thread active on this Slave, + then that means plugin is busy and rpl_semi_sync_slave plugin + cannot be uninstalled. To check whether semi sync + IO thread is active or not, check Rpl_semi_sync_slave_status status + variable value, if it is ON, that means it is busy. + */ + if (!strcmp(name->str, "rpl_semi_sync_slave") && + get_status_var(thd, plugin->plugin->status_vars, + "Rpl_semi_sync_slave_status", buff) && + !strcmp(buff,"ON") ) + { + sql_print_error("Plugin 'rpl_semi_sync_slave' cannot be uninstalled now. " + "Stop any active semisynchronous I/O threads on this slave " + "first.\n"); + my_error(ER_UNKNOWN_ERROR, MYF(0), name->str); + goto err; + } +#endif + plugin->state= PLUGIN_IS_DELETED; if (plugin->ref_count) push_warning(thd, MYSQL_ERROR::WARN_LEVEL_WARN, |