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eb75e8705d
Problem: ======== Auto purge of relaylogs stops when relay-log-file is 'slave-relay-log.999999' and slave_parallel_threads is enabled. Analysis: ========= The problem is that in Relay_log_info::inc_group_relay_log_pos() function, when two log names are compared via strcmp() function, it gives correct result, when log name sequence numbers are of same digits(6 digits), But when the number goes to 7 digits, a 999999 compares greater than 1000000, which is wrong, hence the bug. Fix: ==== Extract the numeric extension part of the file name, convert it into unsigned long and compare. Thanks to David Zhao for the contribution.
110 lines
3.3 KiB
Plaintext
110 lines
3.3 KiB
Plaintext
# ==== Purpose ====
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#
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# Test verifies that auto purging mechanism of relay logs works fine when the
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# file extension grows beyond 999999.
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#
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# ==== Implementation ====
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#
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# Steps:
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# 0 - In master-slave setup clear all the relay logs on the slave server.
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# 1 - Start the slave so that new relay logs starting from
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# 'slave-relay-bin.000001' are created.
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# 2 - Get the active relay-log file name by using SHOW SLAVE STATUS.
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# Shutdown the slave server.
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# 3 - Rename active relay log to '999997' in both 'relay-log.info' and
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# 'slave-relay-bin.index' files.
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# 4 - Restart the slave server by configuring 'slave_parallel_threads=1'
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# and 'max_relay_log_size=100K'.
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# 5 - Generate load on master such that few relay logs are generated on
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# slave. The relay log sequence number will change to 7 digits.
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# 6 - Sync slave with master to ensure that relay logs are applied on
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# slave. They should have been automatically purged.
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# 7 - Assert that there is no 'slave-relay-bin.999999' file in
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# 'relay-log.info'.
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#
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# ==== References ====
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#
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# MDEV-8134: The relay-log is not flushed after the slave-relay-log.999999
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# showed
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#
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--source include/have_innodb.inc
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--source include/have_binlog_format_row.inc
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--let $rpl_topology=1->2
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--source include/rpl_init.inc
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--connection server_2
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--source include/stop_slave.inc
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RESET SLAVE;
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--source include/start_slave.inc
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--source include/stop_slave.inc
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--let $relay_log=query_get_value(SHOW SLAVE STATUS, Relay_Log_File, 1)
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--echo #
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--echo # Stop slave server
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--echo #
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--let $datadir = `select @@datadir`
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--exec echo "wait" > $MYSQLTEST_VARDIR/tmp/mysqld.2.expect
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--shutdown_server 10
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--source include/wait_until_disconnected.inc
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--exec sed -i "s/$relay_log/slave-relay-bin.999997/g" $datadir/relay-log.info
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--exec sed -i "s/$relay_log/slave-relay-bin.999997/g" $datadir/slave-relay-bin.index
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--echo #
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--echo # Simulate file number get close to 999997
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--echo # by renaming relay logs and modifying index/info files
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--move_file $datadir/$relay_log $datadir/slave-relay-bin.999997
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--echo #
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--echo # Restart slave server
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--echo #
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--exec echo "restart" > $MYSQLTEST_VARDIR/tmp/mysqld.2.expect
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--enable_reconnect
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--source include/wait_until_connected_again.inc
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SET @save_slave_parallel_threads= @@GLOBAL.slave_parallel_threads;
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SET @save_max_relay_log_size= @@GLOBAL.max_relay_log_size;
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SET GLOBAL slave_parallel_threads=1;
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SET GLOBAL max_relay_log_size=100 * 1024;
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--source include/start_slave.inc
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--connection server_1
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create table t1 (i int, c varchar(1024));
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--echo #
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--echo # Insert some data to generate enough amount of binary logs
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--echo #
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--let $count = 1000
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--disable_query_log
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while ($count)
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{
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eval insert into t1 values (1001 - $count, repeat('a',1000));
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dec $count;
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}
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--enable_query_log
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--save_master_pos
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--connection server_2
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--sync_with_master
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--let $relay_log=query_get_value(SHOW SLAVE STATUS, Relay_Log_File, 1)
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--echo #
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--echo # Assert that 'slave-relay-bin.999999' is purged.
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--echo #
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let SEARCH_FILE=$datadir/slave-relay-bin.index;
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let SEARCH_PATTERN=slave-relay-bin.999999;
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source include/search_pattern_in_file.inc;
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--source include/stop_slave.inc
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SET GLOBAL slave_parallel_threads= @save_slave_parallel_threads;
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SET GLOBAL max_relay_log_size= @save_max_relay_log_size;
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--source include/start_slave.inc
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--connection server_1
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DROP TABLE t1;
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--source include/rpl_end.inc
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