###########################################################################
# BUG#20928790 SHOW BINLOG EVENTS COMPLETELY LOCKS DOWN WRITES TO BINLOG, #
# HENCE TRANSACTIONS.                                                     #
#                                                                         #
# Problem: While a `SHOW BINLOG EVENTS` is executing, any parallel        #
# transaction is blocked.                                                 #
#                                                                         #
# Steps to reproduce:                                                     #
# ===================                                                     #
#  1) Execute 'show binlog events' on one connection and let it wait      #
#     inside a loop that reads the events from the file using DEBUG_SYNC  #
#     point                                                               #
#  2) While the command is waiting, execute some transactions and see     #
#     that they are not blocked.                                          #
#                                                                         #
###########################################################################
--source include/have_debug_sync.inc
--source include/have_binlog_format_statement.inc

# To make test to start with master-bin.000001
RESET MASTER;
# Run some sample tests to put it in master-bin.000001
CREATE TABLE t1(i INT);
DROP TABLE t1;

connect (con1,localhost,root,,);
# Let show binlog events wait while it is reading events
SET DEBUG_SYNC = "wait_in_show_binlog_events_loop SIGNAL reached_for_loop WAIT_FOR go_ahead";
--send SHOW BINLOG EVENTS

--connection default
# Make sure show binlog events execution reaches the point where we wanted to
SET DEBUG_SYNC = "now WAIT_FOR reached_for_loop";

# Now execute some transactions and it should not be blocked
CREATE TABLE t1(i INT);
INSERT INTO t1 VALUES (12);
DROP TABLE t1;

# Once above sample transactions are running fine, send signal to continue
# 'show binlog events' command
SET DEBUG_SYNC = "now SIGNAL go_ahead";

# Make sure show binlog events run successfully
# 'show binlog events' output varies for different runs
# (gtid, non-gtid, 5.6, 5.7). So lets disable the output
--disable_result_log
--connection con1
--reap
--enable_result_log
