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--source include/have_debug.inc
--source include/have_debug_sync.inc
# Connect to all
--source connect.inc
--echo #
--echo # Test participants' restart during a schema distribution
--echo #
--echo # Case 1 : Participant restarts before the coordinator starts waiting on a schema op
# Also covers Bug#31721534
connection mysqld1;
--echo # Activate the sync points required for the test
# Enable debug sync point to make the client wait for a
# participant restart before logging the schema op into ndb_schema table.
SET DEBUG_SYNC="ndb_schema_before_write WAIT_FOR reached_check_wakeup_clients";
# Enable debug code in check_wakeup_clients that signals and waits
# for the client to log the schema op into ndb_schema table.
SET GLOBAL DEBUG="+d,ndb_check_wakeup_clients_syncpoint";
# Enable debug sync point in client that signals check_wakeup_clients
# to continue once the schema op has been logged into ndb_schema table.
SET DEBUG_SYNC="ndb_schema_after_write SIGNAL continue_check_wakeup_clients";
--echo # Execute a DDL through send which will cause the
--echo # client to wait until a participant (mysqld6) unsubscribes
send CREATE TABLE t1 (a INT) ENGINE NDB;
--echo # Shutdown a participant Server
connection mysqld6;
let $mysqld_name=mysqld.6.1;
--source include/shutdown_mysqld.inc
--echo # Verify that the DDL was successful
connection mysqld1;
reap;
SHOW CREATE TABLE t1;
--echo # Cleanup
# Start mysqld6 again
connection mysqld6;
--source include/start_mysqld.inc
--source include/ndb_not_readonly.inc
connection mysqld1;
set GLOBAL debug="-d,ndb_check_wakeup_clients_syncpoint";
set debug_sync="RESET";
DROP TABLE t1;
--echo # Case 2 : Participant restarts after replying to the
--echo # schema op but the coordinator is waiting on other participants
--echo # Defer sending schema op ack from mysqld2
--echo # to make the coordinator wait for it
connection mysqld2;
set GLOBAL debug="+d,ndb_defer_sending_participant_ack";
--echo # Execute a DDL through send on mysqld1
connection mysqld1;
send CREATE TABLE t1 (a INT) ENGINE NDB;
--echo # Wait for the participant mysqld6 to send the ack so
--echo # that we can restart it and test the coordinator
# This is ensured by waiting for all other participants except
# mysqld2 to send acks (i.e.) wait until 5 reply rows are
# found in ndb_schema_result table
connection mysqld6;
let $ndb_select_all_log= $MYSQLTEST_VARDIR/tmp/ndb_select_all.log;
let $wait_counter= 100; # wait for atmost 10s
while ($wait_counter)
{
exec $NDB_SELECT_ALL -d mysql ndb_schema_result > $ndb_select_all_log;
let $success=`SELECT LOAD_FILE("$ndb_select_all_log") LIKE "%5 rows returned%"`;
if ($success)
{
let $wait_counter= 0;
}
if (!$success)
{
sleep 0.1;
dec $wait_counter;
if (!$wait_counter)
{
die Expected participants did not reply before wait timeout;
}
}
}
remove_file $ndb_select_all_log;
--echo # Shutdown a participant Server
--let $mysqld_name=mysqld.6.1
--source include/shutdown_mysqld.inc
--echo # Resume sending the ack from participant mysqld2
connection mysqld2;
set GLOBAL debug="-d,ndb_defer_sending_participant_ack";
SET DEBUG_SYNC="now SIGNAL resume_sending_participant_ack";
--echo # Verify that the DDL was successful without any warnings
connection mysqld1;
reap;
SHOW CREATE TABLE t1;
--echo # Cleanup
# Start mysqld6 again
connection mysqld6;
--source include/start_mysqld.inc
--source include/ndb_not_readonly.inc
connection mysqld1;
DROP TABLE t1;
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