diff options
Diffstat (limited to 'mysql-test/suite/galera/t/MDEV-32938.test')
-rw-r--r-- | mysql-test/suite/galera/t/MDEV-32938.test | 57 |
1 files changed, 57 insertions, 0 deletions
diff --git a/mysql-test/suite/galera/t/MDEV-32938.test b/mysql-test/suite/galera/t/MDEV-32938.test new file mode 100644 index 00000000..cb41f21a --- /dev/null +++ b/mysql-test/suite/galera/t/MDEV-32938.test @@ -0,0 +1,57 @@ +# +# MDEV-32938: ALTER command is replicated and successfully applied while being BF-aborted locally. +# +# Why it happend: +# - ALTER went to prepare FK-referenced tables as TOI keys +# - to do this, it would open the main table with SHARED_HIGH_PRIO MDL lock which disregarded any +# other locks (including X-lock) waiting in the queue in case someone was already holding a +# compatible lock type (like any DML operation) +# - if there was other TOI operation on the same table, it would go through BF-abort cycle to grab +# the lock for itself +# - since the initial ALTER had not reached TOI yet, it would loose to real TOI operation and got +# BF-aborted with its THD marked as killed +# - then, ALTER would enter TOI and get replicated with no checks that it has already been aborted +# - after entering TOI mode, it would later find it'd been killed, and complete with an error +# - at the same time, the command would successfully apply on every other node except the initiator. +# +# Fixed by checking killed state on THD before entering TOI. +# + +--source include/galera_cluster.inc +--source include/have_debug_sync.inc +--source include/have_debug.inc + +--connect con1,127.0.0.1,root,,test,$NODE_MYPORT_1 + +call mtr.add_suppression("WSREP: ALTER TABLE isolation failure"); + +CREATE TABLE t1(c1 INT PRIMARY KEY, c2 INT) ENGINE=InnoDB; + +# Run ALTER DROP COLUMN and hang before closing tables on adding FK keys and before entering TOI. +# Wait until it gets BF-aborted. +SET DEBUG_SYNC = 'wsrep_append_fk_toi_keys_before_close_tables SIGNAL may_alter WAIT_FOR bf_abort'; +--send + ALTER TABLE t1 DROP COLUMN c2; + +--connection node_1 +# Run ALTER ADD COLUMN and BF-abort the previous ALTER DROP COLUMN. +SET DEBUG_SYNC = 'now WAIT_FOR may_alter'; +ALTER TABLE t1 ADD COLUMN c3 INT; + +--connection con1 +# ALTER DROP COLUMN gets BF aborted. +--error ER_QUERY_INTERRUPTED +--reap + +INSERT INTO t1 (c1, c2, c3) VALUES (1, 0, 0); + +--connection node_2 +# ALTER DROP COLUMN must not be replicated. +INSERT INTO t1 (c1, c2, c3) VALUES (2, 0, 0); + +# Cleanup. +--connection node_1 +SET DEBUG_SYNC = 'RESET'; +DROP TABLE t1; +--disconnect con1 +--source include/galera_end.inc |