How can i validate a field is indexed in elasticsearch

I got Mapping issue in kibana4. From my logstash configuration below are the two fields renamed to time_stamp.
Before it was working fine and it type is 'String'. Now I am getting conflict message in field 'time_stamp'. Using kibana4.

rename => [ "timeStamp" , "time_stamp" ]
rename => [ "RunTime" , "time_stamp" ]
locale => "en"
match => [ "time_stamp" , "yyyy-MM-dd HH:mm:ss.SSS" ]
timezone => "America/Chicago"
target => "time_stamp"


How can i validate time_stamp is really indexed or not? Plz help.

I think you might mean why does it show as different mapping types?
Are you setting the field mappings in ES via a template, or using dynamic mappings?