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 * FROM {panels_pane} WHERE did IN (:dids_0, :dids_1, :dids_2, :dids_3, :dids_4, :dids_5, :dids_6, :dids_7) ORDER BY did, panel, position; Array
(
    [:dids_0] =&amp;gt; 1
    [:dids_1] =&amp;gt; 2
    [:dids_2] =&amp;gt; 3
    [:dids_3] =&amp;gt; 4
    [:dids_4] =&amp;gt; 5
    [:dids_5] =&amp;gt; 6
    [:dids_6] =&amp;gt; 7
    [:dids_7] =&amp;gt; 8
)
 in panels_load_displays() (line 1003 of /var/www/office51/data/www/office-line86.ru/sites/all/modules/panels/panels.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_cacherules_event_whitelist
)
 in lock_may_be_available() (line 167 of /var/www/office51/data/www/office-line86.ru/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; 17941409106a814249cc5b20.06476662
)
 in lock_release_all() (line 269 of /var/www/office51/data/www/office-line86.ru/includes/lock.inc).</p><hr />