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During Maria's checkpoint, use the proper mutex to read transaction's short_id

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storage/maria/trnman.c:
  During Maria's checkpoint, we walk the list of active transactions; in this list we may find a transaction with a short_id of 0 which means "uninitialized" (is being created right now) and want to ignore this transaction. Such short_id is set under trn->state_lock, so use this mutex to reliably read short_id during checkpoint.
This commit is contained in:
Guilhem Bichot 2008-11-20 15:11:00 +01:00
parent f36a9625e3
commit 8d96bcda72
1 changed files with 4 additions and 1 deletions
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storage/maria/trnman.c
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@ -682,7 +682,10 @@ my_bool trnman_collect_transactions(LEX_STRING *str_act, LEX_STRING *str_com,
*/ */
uint sid; uint sid;
LSN rec_lsn, undo_lsn, first_undo_lsn; LSN rec_lsn, undo_lsn, first_undo_lsn;
if ((sid= trn->short_id) == 0) pthread_mutex_lock(&trn->state_lock);
sid= trn->short_id;
pthread_mutex_unlock(&trn->state_lock);
if (sid == 0)
{ {
/* /*
Not even inited, has done nothing. Or it is the Not even inited, has done nothing. Or it is the