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in short we now record whenever the slave I/O thread ignores a master's event because of its server id, and use this info in the slave SQL thread to advance Exec_master_log_pos. Because if we do not, this variable stays at the position of the last executed event, i.e. the last *non-ignored* executed one, which may not be the last of the master's binlog (and so the slave *looks* behind the master though it's data-wise it's not). mysql-test/t/rpl_dual_pos_advance-master.opt: empty; its goal is just to trigger a server restart after running the test, so that the master forgets that it was a slave (otherwise it affects the following tests). sql/log.cc: No more default arguments for Rotate_log_event constructor. MYSQL_LOG::appendv() is now called without mutex. sql/log_event.cc: Moving one Rotate_log_event constructor from log_event.h. Support for on-demand choice of duplicating the string argument of the constructor or not (because there now are needs for both alternatives, see slave.cc). sql/log_event.h: We now have a case where a Rotate_log_event is executed by the slave SQL thread while not being in the relay log, so it needs to pretend its length is 0: a ZERO_LEN flag for that; a flag DUP_NAME (replaces "bool alloced") to be able to choose if we want the constructor to duplicate the string argument or not. sql/slave.cc: A comment for BUG#13861 (to be fixed). llstr() instead of %ld as the number is ulonglong. mi->rli becomes rli in some places. Fix for BUG#13023: - in the slave I/O thread, whenever we ignore an event because of its server id we update a couple of coordinates in memory - in the slave SQL thread, whenever we bump into the end of the latest relay log, we check this couple of coordinates to see if we should advance our Exec_master_log_pos. - when the slave I/O thread terminates it saves these in-memory coordinates into a Rotate event in the relay log, so that they are durable. sql/slave.h: A couple of coordinates in RELAY_LOG_INFO to keep track of the last ignored events received by the slave I/O thread (ignored because of the server id). mysql-test/r/rpl_dual_pos_advance.result: New BitKeeper file ``mysql-test/r/rpl_dual_pos_advance.result'' mysql-test/t/rpl_dual_pos_advance.test: Test for BUG#13023 (with a part, disabled, to test BUG#13861 when I fix it). Before the fix, this test used to hang.
108 lines
2.1 KiB
Text
108 lines
2.1 KiB
Text
# This test checks that in a dual-head setup
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# A->B->A, where A has --log-slave-updates (why would it?
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# assume that there is a C as slave of A),
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# then the Exec_master_log_pos of SHOW SLAVE STATUS does
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# not stay too low on B(BUG#13023 due to events ignored because
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# of their server id).
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# It also will test BUG#13861.
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source include/master-slave.inc;
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# set up "dual head"
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connection slave;
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reset master;
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connection master;
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--replace_result $SLAVE_MYPORT SLAVE_PORT
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eval change master to master_host="127.0.0.1",master_port=$SLAVE_MYPORT,master_user="root";
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start slave;
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# now we test it
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connection slave;
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create table t1 (n int);
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save_master_pos;
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connection master;
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sync_with_master;
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# Now test BUG#13861. This will be enabled when Guilhem fixes this
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# bug.
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# stop slave
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# create table t2 (n int); # create one ignored event
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# save_master_pos;
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# connection slave;
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# sync_with_master;
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# connection slave;
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# show tables;
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# save_master_pos;
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# create table t3 (n int);
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# connection master;
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# bug is that START SLAVE UNTIL may stop too late, we test that by
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# asking it to stop before creation of t3.
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# start slave until master_log_file="slave-bin.000001",master_log_pos=195;
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# wait until it's started (the position below is the start of "CREATE
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# TABLE t2") (otherwise wait_for_slave_to_stop may return at once)
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# select master_pos_wait("slave-bin.000001",137);
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# wait_for_slave_to_stop;
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# then BUG#13861 causes t3 to show up below (because stopped too
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# late).
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# show tables;
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# start slave;
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# BUG#13023 is that Exec_master_log_pos may stay too low "forever":
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connection master;
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create table t4 (n int); # create 3 ignored events
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create table t5 (n int);
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create table t6 (n int);
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save_master_pos;
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connection slave;
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sync_with_master;
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connection slave;
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save_master_pos;
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connection master;
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# then BUG#13023 caused hang below ("master" looks behind, while it's
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# not in terms of updates done).
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sync_with_master;
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show tables;
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# cleanup
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stop slave;
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reset slave;
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drop table t1,t4,t5,t6; # add t2 and t3 later
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save_master_pos;
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connection slave;
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sync_with_master;
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# End of 4.1 tests
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