Additional uncaught exception thrown while handling exception.

Original

PDOException: SQLSTATE[HY000]: General error: 2006 MySQL server has gone away: SELECT word, kid FROM {biblio_keyword_data} ORDER BY word ASC; Array ( ) in _get_biblio_filters() (line 927 of /web/www/pra/sites/all/modules/biblio/includes/biblio.pages.inc).

Additional

PDOException: SQLSTATE[HY000]: General error: 2006 MySQL server has gone away: INSERT INTO {watchdog} (uid, type, message, variables, severity, link, location, referer, hostname, timestamp) VALUES (:db_insert_placeholder_0, :db_insert_placeholder_1, :db_insert_placeholder_2, :db_insert_placeholder_3, :db_insert_placeholder_4, :db_insert_placeholder_5, :db_insert_placeholder_6, :db_insert_placeholder_7, :db_insert_placeholder_8, :db_insert_placeholder_9); Array ( [:db_insert_placeholder_0] => 0 [:db_insert_placeholder_1] => php [:db_insert_placeholder_2] => %type: !message in %function (line %line of %file). [:db_insert_placeholder_3] => a:6:{s:5:"%type";s:12:"PDOException";s:8:"!message";s:138:"SQLSTATE[HY000]: General error: 2006 MySQL server has gone away: SELECT word, kid FROM {biblio_keyword_data} ORDER BY word ASC; Array ( ) ";s:9:"%function";s:21:"_get_biblio_filters()";s:5:"%file";s:63:"/web/www/pra/sites/all/modules/biblio/includes/biblio.pages.inc";s:5:"%line";i:927;s:14:"severity_level";i:3;} [:db_insert_placeholder_4] => 3 [:db_insert_placeholder_5] => [:db_insert_placeholder_6] => http://pralab.diee.unica.it/en/biblio?page=8&amp%3Bamp%3Bs=type&amp%3Bamp%3Bo=asc&amp%3Bamp%3Bf%5Bauthor%5D=356&amp%3Bf%5Bauthor%5D=5&f%5Bauthor%5D=188&s=author&o=asc [:db_insert_placeholder_7] => [:db_insert_placeholder_8] => 192.168.1.6 [:db_insert_placeholder_9] => 1579242001 ) in dblog_watchdog() (line 160 of /web/www/pra/modules/dblog/dblog.module).