Merge two patches for bug 56895 into tip of mysql-5.1 branch.

mysql-test/include/restart_slave_sql.inc

@@ -0,0 +1,43 @@
+# ==== Purpose ====
+#
+# Provide a earier way to restart SQL thread when you want to stop sql thread
+# and then start it immediately.
+#
+# Sources stop_slave_sql.inc to stop SQL thread on the current connection.
+# Then issues START SLAVE SQL_THREAD and then waits until
+# the SQL threads have started, or until a timeout is reached.
+#
+# Please use this instead of 'STOP|START SLAVE SQL_THREAD', to reduce the risk of
+# test case bugs.
+#
+#
+# ==== Usage ====
+#
+# [--let $slave_timeout= NUMBER]
+# [--let $rpl_debug= 1]
+# --source include/restart_slave_sql.inc
+#
+# Parameters:
+#   $slave_timeout
+#     See include/wait_for_slave_param.inc
+#
+#   $rpl_debug
+#     See include/rpl_init.inc
+
+
+--let $include_filename= restart_slave.inc
+--source include/begin_include_file.inc
+
+
+if (!$rpl_debug)
+{
+  --disable_query_log
+}
+
+source include/stop_slave_sql.inc;
+START SLAVE SQL_THREAD;
+source include/wait_for_slave_sql_to_start.inc;
+
+
+--let $include_filename= restart_slave.inc
+--source include/end_include_file.inc

mysql-test/include/rpl_connection_master.inc

@@ -0,0 +1,2 @@
+let $rpl_connection_name= master;
+source include/rpl_connection.inc;

mysql-test/include/rpl_connection_slave.inc

@@ -0,0 +1,2 @@
+let $rpl_connection_name= slave;
+source include/rpl_connection.inc;

mysql-test/include/rpl_connection_slave1.inc

@@ -0,0 +1,2 @@
+let $rpl_connection_name= slave1;
+source include/rpl_connection.inc;

mysql-test/include/rpl_start_server.inc

@@ -45,15 +45,7 @@ if ($rpl_server_parameters)
 --source include/rpl_connection.inc
 
 # Write file to make mysql-test-run.pl start up the server again
---let WRITE_TO_FILE= $MYSQLTEST_VARDIR/tmp/mysqld.$rpl_server_number.expect
---let WRITE_TO_VAR= $_rpl_start_server_command
-perl;
-my $file= $ENV{'WRITE_TO_FILE'};
-my $var= $ENV{'WRITE_TO_VAR'};
-open WRITE_FILE, ">> $file" or die "Error opening $file: $!";
-print WRITE_FILE $var, "\n" or die "Error appending to $file: $!";
-close WRITE_FILE or die "Error closing $file: $!";
-EOF
+--exec echo "$_rpl_start_server_command" > $MYSQLTEST_VARDIR/tmp/mysqld.$rpl_server_number.expect
 
 --source include/rpl_reconnect.inc
 

mysql-test/include/rpl_stop_server.inc

@@ -44,9 +44,7 @@ if ($rpl_debug)
 
 # Write file to make mysql-test-run.pl expect the "crash", but don't start
 # it until it's told to
---append_file $MYSQLTEST_VARDIR/tmp/mysqld.$rpl_server_number.expect
-wait
-EOF
+--exec echo "wait" > $MYSQLTEST_VARDIR/tmp/mysqld.$rpl_server_number.expect
 
 # Send shutdown to the connected server and give
 # it 10 seconds to die before zapping it