Bug#16865959 - PLEASE BACKPORT BUG 14749800.

Since log_throttle is not available in 5.5. Logging of
error message for failure of thread to create new connection
in "create_thread_to_handle_connection" is not backported.

Since, function "my_plugin_log_message" is not available in 
5.5 version and since there is incompatibility between
sql_print_XXX function compiled with g++ and alog files with
gcc to use sql_print_error, changes related to audit log
plugin is not backported.

1 files changed, 6 insertions, 2 deletions

diff --git a/sql/sys_vars.cc b/sql/sys_vars.cc
index 2430a54ffd7..1d0f9691629 100644
--- a/sql/sys_vars.cc
+++ b/sql/sys_vars.cc
@@ -746,6 +746,7 @@ static bool event_scheduler_check(sys_var *self, THD *thd, set_var *var)
 }
 static bool event_scheduler_update(sys_var *self, THD *thd, enum_var_type type)
 {
+  int err_no= 0;
   uint opt_event_scheduler_value= Events::opt_event_scheduler;
   mysql_mutex_unlock(&LOCK_global_system_variables);
   /*
@@ -765,11 +766,14 @@ static bool event_scheduler_update(sys_var *self, THD *thd, enum_var_type type)
     for deadlocks. See bug#51160.
   */
   bool ret= opt_event_scheduler_value == Events::EVENTS_ON
-            ? Events::start()
+            ? Events::start(&err_no)
             : Events::stop();
   mysql_mutex_lock(&LOCK_global_system_variables);
   if (ret)
-    my_error(ER_EVENT_SET_VAR_ERROR, MYF(0), 0);
+  {
+    Events::opt_event_scheduler= Events::EVENTS_OFF;
+    my_error(ER_EVENT_SET_VAR_ERROR, MYF(0), err_no);
+  }
   return ret;
 }