Error message

  • Error searching Solr index "503" Status: Backend fetch failed
  • Error searching Solr index "503" Status: Backend fetch failed
  • Warning: array_map(): Argument #2 should be an array in islandora_solr_islandora_basic_collection_backend_callable() (line 469 of /var/www/drupal-7.56/sites/all/modules/islandora_solr_search/includes/utilities.inc).
  • Error searching Solr index "503" Status: Backend fetch failed