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With MDEV-15132 in MariaDB 10.3.5, InnoDB no longer writes the transaction identifier to the TRX_SYS page. The information is only written to undo log headers and sometimes rollback segment headers. Because the setting innodb_force_recovery=5 will skip reading any of those pages, the maximum transaction identifier will no longer be determined. innobase_map_isolation_level(): Always report READ UNCOMMITTED if innodb_force_recovery has been set to 5 or more, or innodb_read_only is set. This will avoid errors reported by lock_check_trx_id_sanity() and ReadView::check_trx_id_sanity(). lock_clust_rec_cons_read_sees(): Do not check for innodb_read_only, now that innobase_map_isolation_level() will guarantee that no read view will be created or used. row_search_mvcc(): Do not check for innodb_force_recovery<5, now that innobase_map_isolation_level() will guarantee that no read view will be created or used.
86 lines
3 KiB
Text
86 lines
3 KiB
Text
--source include/have_innodb.inc
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--source include/have_debug.inc
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--source include/have_debug_sync.inc
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# need to restart server
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--source include/not_embedded.inc
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--disable_query_log
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# Ignore messages from the innodb_force_recovery=5 startup.
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call mtr.add_suppression("\\[ERROR\\] InnoDB: Failed to find tablespace for table `test`\\.`t` in the cache");
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call mtr.add_suppression("\\[Warning\\] InnoDB: Allocated tablespace ID.* for test/t, old maximum was 0");
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FLUSH TABLES;
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--enable_query_log
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--connect(con1, localhost, root)
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CREATE TABLE t(a INT PRIMARY KEY) ENGINE=InnoDB;
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INSERT INTO t VALUES(1);
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BEGIN;
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# Generate insert_undo log.
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INSERT INTO t VALUES(2);
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# Generate update_undo log.
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UPDATE t SET a=20 WHERE a=2;
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--connect(con2, localhost, root)
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--echo # Normal MariaDB shutdown would roll back the above transaction.
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--echo # We want the transaction to remain open, so we will kill the server
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--echo # after ensuring that any non-transactional files are clean.
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FLUSH TABLES;
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--echo # Create another transaction that will be recovered as COMMITTED.
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BEGIN;
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# Generate multiple pages of both insert_undo and update_undo, so that
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# the state TRX_UNDO_CACHE will not be chosen.
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--disable_query_log
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let $n= 10000;
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while ($n) {
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dec $n;
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eval INSERT INTO t VALUES(-$n);
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eval DELETE FROM t WHERE a=-$n;
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}
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--enable_query_log
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SET DEBUG_SYNC='after_trx_committed_in_memory SIGNAL committed WAIT_FOR ever';
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send COMMIT;
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connection default;
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SET DEBUG_SYNC='now WAIT_FOR committed';
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--echo # Ensure that the above transactions become durable.
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SET GLOBAL innodb_flush_log_at_trx_commit=1;
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BEGIN;
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INSERT INTO t VALUES(-10000);
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ROLLBACK;
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--let $restart_parameters= --innodb-force-recovery=3
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--let $shutdown_timeout= 0
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--source include/restart_mysqld.inc
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--let $shutdown_timeout= 30
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--disconnect con1
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--disconnect con2
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SELECT * FROM t;
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SET TRANSACTION ISOLATION LEVEL READ UNCOMMITTED;
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SELECT * FROM t;
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# refused on MySQL 5.6, MariaDB 10.0, 10.1, but not MariaDB 10.2+
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UPDATE t SET a=3 WHERE a=1;
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--let $restart_parameters= --innodb-read-only
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--source include/restart_mysqld.inc
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--echo # Starting with MariaDB 10.2, innodb_read_only implies READ UNCOMMITTED.
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--echo # In earlier versions, this would return the last committed version
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--echo # (only a=3; no record for a=20)!
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SELECT * FROM t;
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SET TRANSACTION ISOLATION LEVEL READ UNCOMMITTED;
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SELECT * FROM t;
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--let $restart_parameters= --innodb-force-recovery=5
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--source include/restart_mysqld.inc
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--echo #
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--echo # MDEV-15418 innodb_force_recovery=5 displays bogus warnings
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--echo # about too new transaction identifier
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--echo #
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--echo # With the fix, innodb_force_recovery=5 implies READ UNCOMMITTED.
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SELECT * FROM t;
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SET TRANSACTION ISOLATION LEVEL SERIALIZABLE;
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SELECT * FROM t;
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SET TRANSACTION ISOLATION LEVEL READ COMMITTED;
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SELECT * FROM t;
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--let $restart_parameters=
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--source include/restart_mysqld.inc
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SELECT * FROM t;
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DROP TABLE t;
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let SEARCH_FILE= $MYSQLTEST_VARDIR/log/mysqld.1.err;
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--let SEARCH_PATTERN= Rolled back recovered transaction [^0]
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--source include/search_pattern_in_file.inc
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