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84da20e658
This is actually an existing problem in the old binlog implementation, and this patch is applicable to old binlog also. The problem is that RESET MASTER can run concurrently with binlog dump threads / connected slaves. This will remove the binlog from under the feet of the reader, which can cause all sorts of strange behaviour. This patch fixes the problem by disallowing to run RESET MASTER when dump threads (or other RESET MASTER or SHOW BINARY LOGS) are running. An error is thrown in this case, user must stop slaves and/or kill dump threads to make the RESET MASTER go through. A slave that connects in the middle of RESET MASTER will wait for it to complete. Fix a lot of test cases to kill any lingering dump threads before doing RESET MASTER, mostly just by sourcing include/kill_binlog_dump_threads.inc. Signed-off-by: Kristian Nielsen <knielsen@knielsen-hq.org>
189 lines
8.8 KiB
Plaintext
189 lines
8.8 KiB
Plaintext
#
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# This include file is used by more than one test suite
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# (currently rpl and binlog_encryption).
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# Please check all dependent tests after modifying it
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#
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# ==== Purpose ====
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#
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# Check replication protocol packet size handling
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#
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# ==== Related bugs ====
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# Bug#19402 SQL close to the size of the max_allowed_packet fails on slave
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# BUG#23755: Replicated event larger that max_allowed_packet infinitely re-transmits
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# BUG#42914: No LAST_IO_ERROR for max_allowed_packet errors
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# BUG#55322: SHOW BINLOG EVENTS increases @@SESSION.MAX_ALLOWED_PACKET
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# max-out size db name
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source include/have_binlog_format_row.inc;
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source include/master-slave.inc;
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call mtr.add_suppression("Slave I/O: Got a packet bigger than 'slave_max_allowed_packet' bytes, .*error.* 1153");
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call mtr.add_suppression("Log entry on master is longer than slave_max_allowed_packet");
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call mtr.add_suppression("Could not write packet:");
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call mtr.add_suppression("Got a packet bigger than 'max_allowed_packet' bytes");
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let $db= DB_NAME_OF_MAX_LENGTH_AKA_NAME_LEN_64_BYTES_____________________;
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disable_warnings;
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eval drop database if exists $db;
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enable_warnings;
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eval create database $db;
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connection master;
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let $old_max_allowed_packet= `SELECT @@global.max_allowed_packet`;
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let $old_net_buffer_length= `SELECT @@global.net_buffer_length`;
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let $old_slave_max_allowed_packet= `SELECT @@global.slave_max_allowed_packet`;
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SET @@global.max_allowed_packet=1024;
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SET @@global.net_buffer_length=1024;
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sync_slave_with_master;
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# Restart slave for setting to take effect
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source include/stop_slave.inc;
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source include/start_slave.inc;
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# Reconnect to master for new setting to take effect
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disconnect master;
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# alas, can't use eval here; if db name changed apply the change here
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connect (master,localhost,root,,DB_NAME_OF_MAX_LENGTH_AKA_NAME_LEN_64_BYTES_____________________);
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connection master;
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select @@net_buffer_length, @@max_allowed_packet;
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create table `t1` (`f1` LONGTEXT) ENGINE=MyISAM;
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INSERT INTO `t1`(`f1`) VALUES ('aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa1023');
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sync_slave_with_master;
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eval select count(*) from `$db`.`t1` /* must be 1 */;
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SHOW STATUS LIKE 'Slave_running';
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select * from information_schema.session_status where variable_name= 'SLAVE_RUNNING';
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connection master;
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eval drop database $db;
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sync_slave_with_master;
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#
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# Bug #23755: Replicated event larger that max_allowed_packet infinitely re-transmits
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#
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# Check that a situation when the size of event on the master is greater than
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# max_allowed_packet on the slave does not lead to infinite re-transmits.
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connection master;
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# Change the max packet size on master
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SET @@global.max_allowed_packet=4096;
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SET @@global.net_buffer_length=4096;
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# Restart slave for new setting to take effect
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connection slave;
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source include/stop_slave.inc;
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source include/start_slave.inc;
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# Reconnect to master for new setting to take effect
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disconnect master;
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connect (master, localhost, root);
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connection master;
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CREATE TABLE `t1` (`f1` LONGTEXT) ENGINE=MyISAM;
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sync_slave_with_master;
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connection master;
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INSERT INTO `t1`(`f1`) VALUES ('aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa2048');
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#
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# Bug#42914: The slave I/O thread must stop after trying to read the above
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# event, However there is no Last_IO_Error report.
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#
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# The slave I/O thread must stop after trying to read the above event
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connection slave;
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# 1153 = ER_NET_PACKET_TOO_LARGE
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--let $slave_io_errno= 1153
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--let $show_slave_io_error= 1
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--source include/wait_for_slave_io_error.inc
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# TODO: this is needed because of BUG#55790. Remove once that is fixed.
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--source include/stop_slave_sql.inc
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#
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# Bug#42914: On the master, if a binary log event is larger than
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# max_allowed_packet, the error message ER_MASTER_FATAL_ERROR_READING_BINLOG
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# is sent to a slave when it requests a dump from the master, thus leading the
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# I/O thread to stop. However, there is no Last_IO_Error reported.
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#
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--let $rpl_only_running_threads= 1
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--source include/rpl_reset.inc
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--connection master
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DROP TABLE t1;
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--sync_slave_with_master
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connection master;
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CREATE TABLE t1 (f1 int PRIMARY KEY, f2 LONGTEXT, f3 LONGTEXT) ENGINE=MyISAM;
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sync_slave_with_master;
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connection master;
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INSERT INTO t1(f1, f2, f3) VALUES(1, REPEAT('a', @@global.max_allowed_packet), REPEAT('b', @@global.max_allowed_packet));
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connection slave;
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# The slave I/O thread must stop after receiving
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# 1153 = ER_NET_PACKET_TOO_LARGE
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--let $slave_io_errno= 1153
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--let $show_slave_io_error= 1
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--source include/wait_for_slave_io_error.inc
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# Remove the bad binlog and clear error status on slave.
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STOP SLAVE;
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RESET SLAVE;
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--connection master
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--source include/kill_binlog_dump_threads.inc
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RESET MASTER;
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#
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# BUG#55322: SHOW BINLOG EVENTS increases @@SESSION.MAX_ALLOWED_PACKET
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#
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# In BUG#55322, @@session.max_allowed_packet increased each time SHOW
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# BINLOG EVENTS was issued. To verify that this bug is fixed, we
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# execute SHOW BINLOG EVENTS twice and check that max_allowed_packet
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# never changes. We turn off the result log because we don't care
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# about the contents of the binlog.
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--disable_result_log
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SET @max_allowed_packet_0= @@session.max_allowed_packet;
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SHOW BINLOG EVENTS;
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SET @max_allowed_packet_1= @@session.max_allowed_packet;
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SHOW BINLOG EVENTS;
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SET @max_allowed_packet_2= @@session.max_allowed_packet;
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--enable_result_log
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if (`SELECT NOT(@max_allowed_packet_0 = @max_allowed_packet_1 AND @max_allowed_packet_1 = @max_allowed_packet_2)`)
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{
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--echo ERROR: max_allowed_packet changed after executing SHOW BINLOG EVENTS
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--source include/show_rpl_debug_info.inc
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SELECT @max_allowed_packet_0, @max_allowed_packet_1, @max_allowed_packet_2;
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--die @max_allowed_packet changed after executing SHOW BINLOG EVENTS
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}
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--echo ==== clean up ====
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connection master;
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DROP TABLE t1;
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eval SET @@global.max_allowed_packet= $old_max_allowed_packet;
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eval SET @@global.net_buffer_length= $old_net_buffer_length;
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eval SET @@global.slave_max_allowed_packet= $old_slave_max_allowed_packet;
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# slave is stopped
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connection slave;
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DROP TABLE t1;
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# Clear Last_IO_Error
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RESET SLAVE;
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--source include/rpl_end.inc
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# End of tests
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