Additional uncaught exception thrown while handling exception.

<h1>Additional uncaught exception thrown while handling exception.</h1><h2>Original</h2><p>PDOException: SQLSTATE[HY000]: General error: 2006 MySQL server has gone away: SELECT b.*
FROM 
{block} b
WHERE  (b.theme = :db_condition_placeholder_0) AND (b.status = :db_condition_placeholder_1) 
ORDER BY b.region ASC, b.weight ASC, b.module ASC; Array
(
    [:db_condition_placeholder_0] =&amp;gt; mstm_redesign
    [:db_condition_placeholder_1] =&amp;gt; 1
)
 in _block_load_blocks() (line 746 of /var/home/musikverein-st-margarethen_at/www/modules/block/block.module).</p><h2>Additional</h2><p>PDOException: SQLSTATE[HY000]: General error: 2006 MySQL server has gone away: SELECT expire, value FROM {semaphore} WHERE name = :name; Array
(
    [:name] =&amp;gt; rules_get_cacheevent_watchdog
)
 in lock_may_be_available() (line 167 of /var/home/musikverein-st-margarethen_at/www/includes/lock.inc).</p><hr /><h1>Uncaught exception thrown in shutdown function.</h1><p>PDOException: SQLSTATE[HY000]: General error: 2006 MySQL server has gone away: DELETE FROM {semaphore} 
WHERE  (value = :db_condition_placeholder_0) ; Array
(
    [:db_condition_placeholder_0] =&amp;gt; 1043975919664a5b51610442.76303234
)
 in lock_release_all() (line 269 of /var/home/musikverein-st-margarethen_at/www/includes/lock.inc).</p><hr />