What Is The Error here

[15-Nov-2014 15:36:13 UTC] WordPress database error Lost connection to MySQL server during query for query SELECT SQL_CALC_FOUND_ROWS DISTINCT wp_4grng1z7q9_posts.ID FROM wp_4grng1z7q9_posts WHERE 1=1 AND wp_4grng1z7q9_posts.post_type = ‘listing_type’ AND (wp_4grng1z7q9_posts.post_status = ‘publish’) ORDER BY RAND() DESC LIMIT 0, 5 made by require(‘wp-blog-header.php’), require_once(‘wp-includes/template-loader.php’), include(‘/themes/DT/index.php’), core_objects->WIDGETBLOCKS, core_objects->DEFAULT_WIDGETBLOCKS_OUTPUT, do_shortcode, preg_replace_callback, do_shortcode_tag, call_user_func, otw_call_sidebar, call_user_func_array, WP_Widget->display_callback, core_widgets_listings->widget, WP_Query->__construct, WP_Query->query, WP_Query->get_posts

Which part of this long query is causing an error on my site??

thanks