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60035bd2f1
Test galera_parallel_apply_3nodes started to failed occasionally. The test assumes that one round of autocommit retry is sufficient in order to avoid a deadlock error when two conflicting UPDATE statements run concurrently. This assumption no longer holds after galera library has changed last_committed() to return the seqno of the last transaction that left apply monitor, rather than commit monitor. So it is possible that after a BF abort, a command is re-executed before it's BF abortee has left the apply monitor. Thus causing another retry or a deadlock error. Reviewed-by: Jan Lindström <jan.lindstrom@mariadb.com>
36 lines
1.1 KiB
Plaintext
36 lines
1.1 KiB
Plaintext
connection node_2;
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connection node_1;
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connect node_3, 127.0.0.1, root, , test, $NODE_MYPORT_3;
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connect node_1_ctrl, 127.0.0.1, root, , test, $NODE_MYPORT_1;
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CREATE TABLE t1 (f1 INTEGER PRIMARY KEY) ENGINE=InnoDB;
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INSERT INTO t1 VALUES (1);
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connection node_3;
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SET GLOBAL wsrep_slave_threads = 2;
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connection node_1_ctrl;
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SET SESSION wsrep_sync_wait=0;
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connection node_1;
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SET DEBUG_SYNC = 'wsrep_before_certification SIGNAL before_cert WAIT_FOR continue';
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UPDATE t1 SET f1 = f1 + 10;;
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connection node_1_ctrl;
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SET DEBUG_SYNC = 'now WAIT_FOR before_cert';
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SET GLOBAL debug_dbug = '+d,sync.wsrep_retry_autocommit';
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connection node_2;
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UPDATE t1 SET f1 = f1 + 100;;
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connection node_1_ctrl;
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SET DEBUG_SYNC = 'now WAIT_FOR wsrep_retry_autocommit_reached';
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SET GLOBAL debug_dbug = NULL;
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SET DEBUG_SYNC = 'now SIGNAL wsrep_retry_autocommit_continue';
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connection node_1;
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connection node_2;
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connection node_3;
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SELECT f1 = 111 FROM t1;
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f1 = 111
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1
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SELECT COUNT(*) IN (1, 2) FROM INFORMATION_SCHEMA.PROCESSLIST WHERE USER = 'system user' AND STATE LIKE '%committed%';
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COUNT(*) IN (1, 2)
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1
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SET GLOBAL wsrep_slave_threads = DEFAULT;
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DROP TABLE t1;
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connection node_1;
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SET DEBUG_SYNC= 'RESET';
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