Merge pull request #3488 from sysown/v2.x-3487

Closes #3487: Add client information for multi-statements parsing error message

lib/MySQL_Session.cpp

@@ -5454,7 +5454,11 @@ bool MySQL_Session::handler___status_WAITING_CLIENT_DATA___STATE_SLEEP___MYSQL_C
 #endif
 			if (index(dig,';') && (index(dig,';') != dig + strlen(dig)-1)) {
 				string nqn = string((char *)CurrentQuery.QueryPointer,CurrentQuery.QueryLength);
-				proxy_warning("Unable to parse multi-statements command with SET statement: setting lock hostgroup . Command: %s\n", nqn.c_str());
+				proxy_warning(
+					"Unable to parse multi-statements command with SET statement from client"
+					" %s:%d: setting lock hostgroup. Command: %s\n", client_myds->addr.addr,
+					client_myds->addr.port, nqn.c_str()
+				);
 				*lock_hostgroup = true;
 				return false;
 			}