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MDEV-10315 - Online ALTER TABLE may get stuck in tdc_remove_table

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There was race condition between online ALTER TABLE and statements performing
TABLE_SHARE release without marking it flushed (e.g. in case of table cache
overflow, SET @@global.table_open_cache, manager thread purging table cache).

The reason was missing mysql_cond_broadcast().
This commit is contained in:
Sergey Vojtovich 2016-07-01 13:57:18 +04:00
parent 83d5b963bd
commit e56a53920b
1 changed files with 2 additions and 0 deletions
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2
sql/table_cache.cc
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@ -876,6 +876,8 @@ void tdc_release_share(TABLE_SHARE *share)
}
if (--share->tdc.ref_count)
{
if (!share->is_view)
mysql_cond_broadcast(&share->tdc.COND_release);
mysql_mutex_unlock(&share->tdc.LOCK_table_share);
mysql_mutex_unlock(&LOCK_unused_shares);
DBUG_VOID_RETURN;