That's the JSON parsing, not the query_string parsing. You need to use a double slash in JSON in order to pass a single slash, ie:
{ "query": { "query_string": { "query": "name:exampleof\\ bug" } } } Also, re the reserved characters in the query string - that is all handled by Lucene, not Elasticsearch clint -- You received this message because you are subscribed to the Google Groups "elasticsearch" group. To unsubscribe from this group and stop receiving emails from it, send an email to elasticsearch+unsubscr...@googlegroups.com. To view this discussion on the web visit https://groups.google.com/d/msgid/elasticsearch/CAPt3XKQ%3DFLOZwab577DUgGc4wZA9VinxsUoA%2BTwZMqNubVBiqg%40mail.gmail.com. For more options, visit https://groups.google.com/d/optout.