51 lines
2.3 KiB
Plaintext
51 lines
2.3 KiB
Plaintext
###########################################################################
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# BUG#20928790 SHOW BINLOG EVENTS COMPLETELY LOCKS DOWN WRITES TO BINLOG, #
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# HENCE TRANSACTIONS. #
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# #
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# Problem: While a `SHOW BINLOG EVENTS` is executing, any parallel #
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# transaction is blocked. #
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# #
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# Steps to reproduce: #
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# =================== #
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# 1) Execute 'show binlog events' on one connection and let it wait #
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# inside a loop that reads the events from the file using DEBUG_SYNC #
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# point #
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# 2) While the command is waiting, execute some transactions and see #
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# that they are not blocked. #
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# #
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###########################################################################
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--source include/have_debug_sync.inc
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--source include/have_binlog_format_statement.inc
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# To make test to start with binlog.000001
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RESET MASTER;
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# Run some sample tests to put it in binlog.000001
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CREATE TABLE t1(i INT);
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DROP TABLE t1;
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connect (con1,localhost,root,,);
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# Let show binlog events wait while it is reading events
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SET DEBUG_SYNC = "wait_in_show_binlog_events_loop SIGNAL reached_for_loop WAIT_FOR go_ahead";
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--send SHOW BINLOG EVENTS
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--connection default
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# Make sure show binlog events execution reaches the point where we wanted to
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SET DEBUG_SYNC = "now WAIT_FOR reached_for_loop";
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# Now execute some transactions and it should not be blocked
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CREATE TABLE t1(i INT);
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INSERT INTO t1 VALUES (12);
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DROP TABLE t1;
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# Once above sample transactions are running fine, send signal to continue
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# 'show binlog events' command
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SET DEBUG_SYNC = "now SIGNAL go_ahead";
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# Make sure show binlog events run successfully
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# 'show binlog events' output varies for different runs
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# (gtid, non-gtid, 5.6, 5.7). So lets disable the output
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--disable_result_log
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--connection con1
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--reap
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--enable_result_log
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