Error message

• Notice: Undefined variable: http_response_header in Apache_Solr_Service->_sendRawGet() (line 336 of /var/www/html/sites/all/modules/islandora/islandora_solr_search/SolrPhpClient/Apache/Solr/Service.php).
• Error searching Solr index "0" Status: Communication Error
• Warning: Invalid argument supplied for foreach() in islandora_solr_views_query->execute() (line 177 of /var/www/html/sites/all/modules/islandora/islandora_solr_views/islandora_solr_views_query.inc).