database/mariadb
1
0
Fork 0
mirror of https://github.com/MariaDB/server.git synced 2025-07-30 16:24:05 +03:00
Code Activity

mysqltest: Write command to be executed to the log BEFORE executing the command.

Browse Source 
Fixed race condition in event that could cause hang when stopping event scheduler with SET GLOBAL event_scheduler=OFF 

client/mysqltest.cc:
  Write command to be executed to the log BEFORE executing the command.
  This makes it easier to debug crashes as the log will contain the fatal command.
mysql-test/r/mysqltest.result:
  Updated results (we now get more things logged)
sql/event_queue.cc:
  Fixed race condition in event that could cause hang when stopping event scheduler with SET GLOBAL event_scheduler=OFF.
  The reason was that a kill signal could be sent between last check of thd->killed and before thd->enter_cond() in which case the signal
  would be missed and we would be stuck in Event_scheduler::stop() forever.
This commit is contained in:
Michael Widenius
2011-05-09 14:38:49 +03:00
parent a50a5f64f8
commit 4cb68c0e89
3 changed files with 39 additions and 8 deletions
Download Patch File Download Diff File Expand all files Collapse all files

14
sql/event_queue.cc
View File

@ -734,12 +734,14 @@ Event_queue::cond_wait(THD *thd, struct timespec *abstime, const char* msg,
thd->enter_cond(&COND_queue_state, &LOCK_event_queue, msg);
DBUG_PRINT("info", ("pthread_cond_%swait", abstime? "timed":""));
if (!abstime)
pthread_cond_wait(&COND_queue_state, &LOCK_event_queue);
else
pthread_cond_timedwait(&COND_queue_state, &LOCK_event_queue, abstime);
if (!thd->killed)
{
DBUG_PRINT("info", ("pthread_cond_%swait", abstime ? "timed" : ""));
if (!abstime)
pthread_cond_wait(&COND_queue_state, &LOCK_event_queue);
else
pthread_cond_timedwait(&COND_queue_state, &LOCK_event_queue, abstime);
}
mutex_last_locked_in_func= func;
mutex_last_locked_at_line= line;
mutex_queue_data_locked= TRUE;