Failed to format message Kibana

hi
getting failed to format message from test.json which has

{"logMessage": "this is some message 01", "sessionID": "some session", "applicationName": "some application", "uniqueId": "some uniqueid", "applicationVersion": "some version", "hostName": "some host", "loggingTime": "2019-11-26 18:04:20"
}

looked at suggestions from previous issues and tried a few things still not able to get it working.

filebeat.yml is

  filebeat.inputs:
- type: log
  enabled: true
  paths:
     - /home/test.json
  json.keys_under_root: true
  json.add_error_key: true

setup.kibana:
  host: "localhost:5601"

output.logstash:
  hosts: ["localhost:5044"]

processors:
  - rename:
       fields:
          - from: "log"
          - to: "message"

now i get something like

{"file":{"path":"/home/test.json"}}

how can i get the full message in kibana logs
I have kept the kibana.yml just as such

server.host: "localhost"
elasticsearch.hosts: ["http://localhost:9200"]

is there a fix yet, can someone guide me to where i can look for a fix.
Thanks

any suggestions?

ok i think i was over complicating things, guess too much knowledge on the net
just used this is fb conf

  filebeat.inputs:
- type: log
  enabled: true
  paths:
     - /home/test.json
output.logstash:
  hosts: ["localhost:5044"]

and got it working by using simple json filter in logstash

will have to work on multiline patterns now , but thats for some time else

Thanks