mirror of
https://github.com/MariaDB/server.git
synced 2025-01-20 05:52:27 +01:00
4a03cdb7b6
HANG IN PREPARING WITH 100% CPU USAGE Infinite loop in the subselect_indexsubquery_engine::exec() function caused Server hang with 100% CPU usage. The BLACKHOLE storage engine didn't update handler's table->status variable after index operations, that caused an infinite "while(!table->status)" execution. Index access methods of the BLACKHOLE engine handler have been updated to set table->status variable to STATUS_NOT_FOUND or 0 when such a method returns a HA_ERR_END_OF_FILE error or 0 respectively.
11 lines
340 B
Text
11 lines
340 B
Text
#
|
|
# Bug #11880012: INDEX_SUBQUERY, BLACKHOLE,
|
|
# HANG IN PREPARING WITH 100% CPU USAGE
|
|
#
|
|
CREATE TABLE t1(a INT NOT NULL);
|
|
INSERT INTO t1 VALUES (1), (2), (3);
|
|
CREATE TABLE t2 (a INT UNSIGNED, b INT, UNIQUE KEY (a, b)) ENGINE=BLACKHOLE;
|
|
SELECT 1 FROM t1 WHERE a = ANY (SELECT a FROM t2);
|
|
1
|
|
DROP TABLE t1, t2;
|
|
End of 5.5 tests
|