When i see results in Kibana, i see that there are no fields from JSON, more over, message field contains only \"status\" : \"FAILED\".
Is
Try the json_lines codec instead of json. This must have been added recently. In your particular case, you'd first want to change your output from a list of json to newline-delimited json.
http://logstash.net/docs/1.4.0/codecs/json_lines
This codec will decode streamed JSON that is newline delimited. For decoding JSON payload in the redis input for example, use the json codec instead. Encoding will emit a single JSON string ending in a '\n'