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: 2013 Lost connection to MySQL server during query: SELECT token_custom.*
FROM 
{token_custom} token_custom
WHERE  (machine_name IN  (:db_condition_placeholder_0)) ; Array
(
    [:db_condition_placeholder_0] =&amp;gt; title
)
 in token_custom_load_multiple() (line 413 of /var/www/folger.edu/htdocs/sites/all/modules/contrib/token_custom/token_custom.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/www/folger.edu/htdocs/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; 17968044345adcd0d4786dd5.45332180
)
 in lock_release_all() (line 269 of /var/www/folger.edu/htdocs/includes/lock.inc).</p><hr />