Parsing date field value using grok match


I am trying to parse the date field timestamp using grok expression under grok match plugin. The fields which I have given under grok match didn't generated.

match => {"timestamp" => "%{MONTH:month} %{MONTHDAY:monthday}%{DATA:data}%{YEAR:year}, %{HOUR:Hour}:?%{MINUTE:minute}"}

I am not getting month, monthday, year, hour, etc. fields. I am using Logstash version 2.3.0

Thanks in advance

Please give an example of what the timestamp field might contain.

It's pretty unusual to split timestamp into its components like this. Why do you want to do that?