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72 lines
2.5 KiB
Plaintext
72 lines
2.5 KiB
Plaintext
# When the relay log gets rotated while the I/O thread
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# is reading a transaction, the transaction spans on two or more
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# relay logs. If STOP SLAVE occurs while the SQL thread is
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# executing a part of the transaction in the non-first relay logs,
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# we test if START SLAVE will resume in the beginning of the
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# transaction (i.e., step back to the first relay log)
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# The slave is started with max_binlog_size=16384 bytes,
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# to force many rotations (approximately 30 rotations)
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# If the master or slave does not support InnoDB, this test will pass
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source include/master-slave.inc;
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connection slave;
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stop slave;
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connection master;
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--disable_warnings
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create table t1 (a int) type=innodb;
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--enable_warnings
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let $1=8000;
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disable_query_log;
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begin;
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while ($1)
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{
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# eval means expand $ expressions
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eval insert into t1 values( $1 );
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dec $1;
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}
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commit;
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# This will generate a 500kB master's binlog,
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# which corresponds to 30 slave's relay logs.
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enable_query_log;
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save_master_pos;
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connection slave;
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reset slave;
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start slave;
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# We wait 1 sec for the SQL thread to be somewhere in
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# the middle of the transaction, hopefully not in
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# the first relay log, and hopefully before the COMMIT.
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# Usually it stops when the SQL thread is around the 15th relay log.
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# We cannot use MASTER_POS_WAIT() as master's position
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# increases only when the slave executes the COMMIT.
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system sleep 1;
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stop slave;
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# We suppose the SQL thread stopped before COMMIT.
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# If so the transaction was rolled back
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# and the table is now empty.
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# Now restart
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start slave;
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# And see if the table contains '8000'
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# which proves that the transaction restarted at
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# the right place.
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# We must wait for the transaction to commit before
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# reading, MASTER_POS_WAIT() will do it for sure
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# (the only statement with position>=3000 is COMMIT).
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# Older versions of MySQL would hang forever in MASTER_POS_WAIT
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# because COMMIT was said to be position 0 in the master's log (bug).
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# Detect this with timeout.
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select master_pos_wait('master-bin.001',3000,120)=-1;
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select * from t1 where a=8000;
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# The following DROP is a very important cleaning task:
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# imagine the next test is run with --skip-innodb: it will do
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# DROP TABLE IF EXISTS t1; but this will delete the frm and leave
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# some data in the InnoDB datafile (because at that time mysqld
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# does not know about InnoDB : --skip-innodb). So if later in the
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# test suite a test wants to create an InnoDB table called t1, it
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# will fail with
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# InnoDB: Error: table t1 already exists in InnoDB internal
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# InnoDB: data dictionary. Have you deleted the .frm file etc
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drop table t1;
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