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