Make events_restart more stable by waiting for the server to be stopped before starting it again

client/mysqltest.cc

@@ -4174,7 +4174,7 @@ void do_shutdown_server(struct st_command *command)
   /* Check that server dies */
   while(timeout--){
     if (my_kill(0, pid) < 0){
-      DBUG_PRINT("info", ("Sleeping, timeout: %d", timeout));
+      DBUG_PRINT("info", ("Process %d does not exist anymore", pid));
       break;
     }
     DBUG_PRINT("info", ("Sleeping, timeout: %d", timeout));

mysql-test/include/restart_mysqld.inc

 
-# Write file to make mysql-test-run.pl expect crash and restart
+# Write file to make mysql-test-run.pl expect the "crash", but don't start
+# it until it's told to
 --write_file $MYSQLTEST_VARDIR/tmp/mysqld.1.expect
-restart
+wait
 EOF
 
 # Send shutdown to the connected server and give
 # it 10 seconds to die before zapping it
 shutdown_server 10;
 
+# Check server is gone
+--source include/wait_until_disconnected.inc
+
+# Write file to make mysql-test-run.pl start up the server again
+--append_file $MYSQLTEST_VARDIR/tmp/mysqld.1.expect
+restart
+EOF
 
 # Turn on reconnect
 --enable_reconnect

mysql-test/lib/mtr_io.pl

@@ -26,7 +26,7 @@ sub mtr_tonewfile($@);
 sub mtr_appendfile_to_file ($$);
 sub mtr_grab_file($);
 sub mtr_printfile($);
-
+sub mtr_lastlinefromfile ($);
 
 # Read a whole file, stripping leading and trailing whitespace.
 sub mtr_fromfile ($) {
@@ -94,5 +94,17 @@ sub mtr_printfile($) {
   return;
 }
 
+sub mtr_lastlinefromfile ($) {
+  my $file=  shift;
+  my $text;
+
+  open(FILE,"<",$file) or mtr_error("can't open file \"$file\": $!");
+  while (my $line= <FILE>)
+  {
+    $text= $line;
+  }
+  close FILE;
+  return $text;
+}
 
 1;

mysql-test/mysql-test-run.pl

@@ -3320,10 +3320,29 @@ sub check_expected_crash_and_restart {
     my $expect_file= "$opt_vardir/tmp/".$mysqld->name().".expect";
     if ( -f $expect_file )
     {
-      mtr_report("Crash was expected, file '$expect_file' exists");
+      mtr_verbose("Crash was expected, file '$expect_file' exists");
+
+      while (1){
+
+	# If last line in expect file starts with "wait"
+	# sleep a little and try again, thus allowing the
+	# test script to control when the server should start
+	# up again
+	my $last_line= mtr_lastlinefromfile($expect_file);
+	if ($last_line =~ /^wait/ )
+	{
+	  mtr_verbose("Test says wait before restart");
+	  mtr_milli_sleep(100);
+	  next;
+	}
+
+	unlink($expect_file);
+
 	# Start server with same settings as last time
 	mysqld_start($mysqld, $mysqld->{'started_opts'});
-      unlink($expect_file);
+
+	last;
+      }
     }
 
     return 1;