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10ebdb7f1d
Problem:
=======
Executing command, "mysqlbinlog --read-from-remote-server --host='xx.xx.xx.xx'
--port=3306 --user=xxx --password=xxx --database=mysql --to-last-log
mysql-bin.000001 --start-position=1098699 --stop-never |mysql -uxxx -pxxx", we
found that last data read from remote couldn't commit.
Analysis:
========
The purpose of 'Write_on_release_cache' is that the contents of the Cache will
automatically be written to a dedicated result file on destruction. Flush
operation on the result file is controlled by a flag 'FLUSH_F'. Events which
require force flush upon their destruction will have to enable this
'Write_on_release_cache::FLUSH_F'. At present the 'FLUSH_F' flag is defined as
an enum as shown below.
enum flag
{
FLUSH_F
};
Since 'FLUSH_F' is the first member without initialization it get the default
value '0'. Because of this the following flush condition never succeeds.
if (m_flags & FLUSH_F)
fflush(m_file);
At present the file gets flushed only during my_fclose(result_file) operation.
When continuous streaming is enabled through --stop-never option it never gets
flushed and hence events are not replicated.
Fix:
===
Initialize the enum value to non zero value.
66 lines
2.5 KiB
Text
66 lines
2.5 KiB
Text
# ==== Purpose ====
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#
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# Test verifies that continuous streaming of binary log content using the
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# "mysqlbinlog --stop-never" option and sourcing it to mysql client works
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# fine.
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#
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# ==== Implementation ====
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#
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# Steps:
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# 1 - Create a table on a server on which binary log is enabled and insert
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# a row.
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# 2 - Disable the binary log on the server and drop the table.
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# 3 - Capture the binary log output using "mysqlbinlog --stop_never" option
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# and source it to mysql client.
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# 4 - Query the PROCESSLIST table to ensure that the dump thread which is
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# serving "stop_never" option has read entire binlog.
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# 5 - Verify that the table is populated on the server.
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# 6 - Cleanup.
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#
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# ==== References ====
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#
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# MDEV-11154: Write_on_release_cache(log_event.cc) function will not write
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# "COMMIT", if use "mysqlbinlog ... | mysql ..."
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--source include/not_windows.inc
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# Test is not specific to any binlog format. Hence Running only for 'row'.
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--source include/have_binlog_format_row.inc
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# binlog file name is needed in the test. To use master-bin.000001,
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# RESET MASTER is needed.
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RESET MASTER;
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# kill the dump threads if there any dump threads (may be from previous test)
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--source include/stop_dump_threads.inc
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--echo # Step-1: Execute some dummy statements.
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CREATE TABLE t1(i int);
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INSERT INTO t1 values (1);
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--echo # Step-2: Disable binary log temporarily and drop the table 't1'.
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set @@SESSION.SQL_LOG_BIN = 0;
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DROP TABLE t1;
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set @@SESSION.SQL_LOG_BIN = 1;
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--echo # Step-3: Execute MYSQL_BINLOG with --stop-never and source it to mysql client.
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--write_file $MYSQL_TMP_DIR/mysqlbinlog_stop_never.sh
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(`$MYSQL_BINLOG --read-from-remote-server --stop-never --user=root --host=127.0.0.1 --port=$MASTER_MYPORT master-bin.000001 | $MYSQL --user=root --protocol=tcp --host=127.0.0.1 --port=$MASTER_MYPORT`) < /dev/null > /dev/null 2>&1 &
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EOF
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--exec /bin/bash $MYSQL_TMP_DIR/mysqlbinlog_stop_never.sh
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--echo # Step-4: Wait till dump thread transfer is completed.
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let $wait_condition= SELECT id from information_schema.processlist where processlist.command like '%Binlog%' and state like '%Master has sent%';
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--source include/wait_condition.inc
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--echo # Step-5: Check that the data is there.
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let $count= 1;
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let $table= test.t1;
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source include/wait_until_rows_count.inc;
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--echo # Step-6: Cleanup
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--echo # kill the dump thread serving the mysqlbinlog --stop-never process
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--source include/stop_dump_threads.inc
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DROP TABLE t1;
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--remove_file $MYSQL_TMP_DIR/mysqlbinlog_stop_never.sh
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