mydumper erroneously always attempts a dummy read

[Ben Mildren]

if (mysql_get_server_version(conn)) {
  mysql_query(conn, "CREATE TABLE IF NOT EXISTS mysql.mydumperdummy (a INT) ENGINE=INNODB");
  need_dummy_read=1;
 }

Looking at the comments on why this code is included it probably should be:

if (mysql_get_server_version(conn) < 40108) {
  mysql_query(conn, "CREATE TABLE IF NOT EXISTS mysql.mydumperdummy (a INT) ENGINE=INNODB");
  need_dummy_read=1;
 }

On most installs the CREATE TABLE... will fail as a ftwrl is acquired just before, but on the current version of Galera (current PXC binaries are 5.5.34 / 5.6.14), the combination of DDL on the same thread that acquired the ftwrl caused the node to go down (https://bugs.launchpad.net/galera/+bug/1265656). Although this was due to a bug that will be fixed, probably best to restrict the CREATE TABLE to only when required.

[Ben Mildren (ben-mildren-8)]

Adding patch

[Daniel Black (daniel-black)]

thanks Ben and Max for the committed patch.

I've pushed it to Debian Bug Tracker: http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=735851