Shouldn't "fields" actually be "field"?
curl "http://elasticsearch001:9200/logstash-2014.02.05/_mapping/fields/*" -v 2>/dev/null
No handler found for uri [/logstash-2014.02.05/_mapping/fields/*] and method [GET]

curl "http://elasticsearch001:9200/logstash-2014.02.05/_mapping/field/*" -i 2>/dev/null
HTTP/1.1 200 OK
Content-Type: application/json; charset=UTF-8
Content-Length: 39711