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Fix for a BUG#31649: events.test fails: NULL "state" field of

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SHOW PROCESSLIST.

The problem was a race condition: if the Event Scheduler was not
quick enough, the following scenario happens:
  - The Event Scheduler picks up the created event;
  - The event is executed;
  - event_scheduler_thread->proc_info is set to NULL;
  - The client issues SELECT FROM I_S.

The fix is to wait for the Event Scheduler to reach 'Waiting
for next activation' state.
This commit is contained in:
anozdrin/alik@station. 2007-10-31 12:04:19 +03:00
parent 4852cc7fc4
commit 62d2ee935e
1 changed files with 2 additions and 1 deletions
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3
mysql-test/t/events.test
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@ -454,7 +454,8 @@ create event закачка on schedule every 10 hour do select get_lock("test_l
--echo "Should have only 2 processes: the scheduler and the locked event"
let $wait_condition= select count(*) = 2 from information_schema.processlist
where ( (state like 'User lock%' AND info like 'select get_lock%')
OR (command='Daemon' AND user='event_scheduler'));
OR (command='Daemon' AND user='event_scheduler' AND
state = 'Waiting for next activation'));
--source include/wait_condition.inc
select /*2*/ user, host, db, command, state, info