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r2629 | inaam | 2008-09-16 18:46:00 +0300 (Tue, 16 Sep 2008) | 9 lines

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branches/5.0   bug#39483 InnoDB hang on adaptive hash because of out
of order ::open() call by MySQL

Under some conditions MySQL calls ::open with search_latch leading
to a deadlock as we try to acquire dict_sys->mutex inside ::open
breaking the latching order. The fix is to release search_latch.

Reviewed by: Heikki
This commit is contained in:
Timothy Smith
2008-12-12 17:42:34 -07:00
parent a786fa6109
commit 001aaedcb6
1 changed files with 8 additions and 0 deletions
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8
sql/ha_innodb.cc
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@@ -2158,6 +2158,14 @@ ha_innobase::open(
UT_NOT_USED(test_if_locked); UT_NOT_USED(test_if_locked);
thd = current_thd; thd = current_thd;
/* Under some cases MySQL seems to call this function while
holding btr_search_latch. This breaks the latching order as
we acquire dict_sys->mutex below and leads to a deadlock. */
if (thd != NULL) {
innobase_release_temporary_latches(thd);
}
normalize_table_name(norm_name, name); normalize_table_name(norm_name, name);
user_thd = NULL; user_thd = NULL;