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Bug#43587: Putting event_scheduler=1 in init SQL file crashes

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mysqld

The problem was that enabling the event scheduler inside a init
file caused the server to crash upon start-up. The crash occurred
because the event scheduler wasn't being initialized before the
commands in the init-file are processed.

The solution is to initialize the event scheduler before the init
file is read. The patch also disables the event scheduler during
bootstrap and makes the bootstrap operation robust in the
presence of background threads.

mysql-test/std_data/init_file.dat:
  Add test case for Bug#43587
sql/event_scheduler.cc:
  Signal that the thread_count has been decremented.
sql/events.cc:
  Disable the event scheduler during bootstrap.
sql/mysql_priv.h:
  Export variable.
sql/mysqld.cc:
  Initialize the event scheduler before commands are executed.
sql/sql_parse.cc:
  Signal that the bootstrap thread is done.
This commit is contained in:
Davi Arnaut
2009-07-24 15:45:42 -03:00
parent 2bc6b6a800 b4bf7dd31e
commit 8ec2f3d0d1
6 changed files with 61 additions and 29 deletions
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3
sql/sql_parse.cc
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@ -533,8 +533,9 @@ end:
#ifndef EMBEDDED_LIBRARY
(void) pthread_mutex_lock(&LOCK_thread_count);
thread_count--;
(void) pthread_mutex_unlock(&LOCK_thread_count);
in_bootstrap= FALSE;
(void) pthread_cond_broadcast(&COND_thread_count);
(void) pthread_mutex_unlock(&LOCK_thread_count);
my_thread_end();
pthread_exit(0);
#endif