Solr search results not working for staging servers

Hi, the search results for the staging sites appear to be empty.

Working: http://staging1.drupal.org/search/apachesolr_search/search

Not working: http://staging2.drupal.org/search/apachesolr_search/search
Not working: http://staging3.drupal.org/search/apachesolr_search/search
Not working :http://staging4.drupal.org/search/apachesolr_search/search
Not working: http://staging5.drupal.org/search/apachesolr_search/search
Not working: http://staging6.drupal.org/search/apachesolr_search/search
Not working: http://staging7.drupal.org/search/apachesolr_search/search

Perhaps there's a configuration issue that needs to be pushed to all the sites?

Errors: http://staging8.drupal.org/search/apachesolr_search/search
Warning: Lost connection to MySQL server during query query: SELECT 1 FROM access WHERE type = 'host' AND '64.119.156.90' LIKE mask AND status = 0 LIMIT 0, 1 in /var/www/staging8/htdocs/includes/database.mysql.inc on line 141

Not working: http://staging9.drupal.org/search/apachesolr_search/search

Errors: http://staging10.drupal.org/search/apachesolr_search/search
Warning: MySQL server has gone away query: INSERT INTO watchdog (uid, type, message, variables, severity, link, location, referer, hostname, timestamp) VALUES (0, 'php', '%message in %file on line %line.', 'a:4:{s:6:\"%error\";s:12:\"user warning\";s:8:\"%message\";s:0:\"\";s:5:\"%file\";s:44:\"/var/www/staging10/htdocs/includes/cache.inc\";s:5:\"%line\";i:109;}', 3, '', 'http://staging10.drupal.org/search/apachesolr_search/search', '', '64.119.156.90', 1257185149) in /var/www/staging10/htdocs/includes/database.mysql.inc on line 141