Logstash Kafka input - converting date to string format

Elastic Stack Logstash
7

Thanks @leandrojmp

My template looks like below:

{ "template" : "dataCollect_template",
  "version" : 1,  
  "index_patterns": "tdata.kafkacollect-*",
  "settings": {
    "index": {
      "refresh_interval": "10s",
      "number_of_shards": 1,
      "number_of_replicas": 0
    }
  },
  "mappings": {
      "properties": {
        "rdt": { "type": "string" }
      }
    }
}

I see the following 400 response error during start of Logstash:


[2023-03-24T12:09:36,310][INFO ][logstash.outputs.elasticsearch][main] Installing elasticsearch template to _template/dataCollect_template
[2023-03-24T12:09:36,394][ERROR][logstash.outputs.elasticsearch][main] Failed to install template. {:message=>"Got response code '400' contacting Elasticsearch at URL 'http://xx-xxx-xx-xx:9045/_template/dataCollect_template'", :class=>"LogStash::Outputs::ElasticSearch::HttpClient::Pool::BadResponseCodeError",
 :backtrace=>["/opt/tvportal/elasticsearch/app/logstash-7.6.2/vendor/bundle/jruby/2.5.0/gems/logstash-output-elasticsearch-10.3.3-java/lib/logstash/outputs/elasticsearch/http_client/manticore_adapter.rb:80:in `perform_request'",
 "/opt/tvportal/elasticsearch/app/logstash-7.6.2/vendor/bundle/jruby/2.5.0/gems/logstash-output-elasticsearch-10.3.3-java/lib/logstash/outputs/elasticsearch/http_client/pool.rb:332:in `perform_request_to_url'", 
"/opt/tvportal/elasticsearch/app/logstash-7.6.2/vendor/bundle/jruby/2.5.0/gems/logstash-output-elasticsearch-10.3.3-java/lib/logstash/outputs/elasticsearch/http_client/pool.rb:319:in `block in perform_request'",
 "/opt/tvportal/elasticsearch/app/logstash-7.6.2/vendor/bundle/jruby/2.5.0/gems/logstash-output-elasticsearch-10.3.3-java/lib/logstash/outputs/elasticsearch/http_client/pool.rb:414:in `with_connection'", 
"/opt/tvportal/elasticsearch/app/logstash-7.6.2/vendor/bundle/jruby/2.5.0/gems/logstash-output-elasticsearch-10.3.3-java/lib/logstash/outputs/elasticsearch/http_client/pool.rb:318:in `perform_request'", 
"/opt/tvportal/elasticsearch/app/logstash-7.6.2/vendor/bundle/jruby/2.5.0/gems/logstash-output-elasticsearch-10.3.3-java/lib/logstash/outputs/elasticsearch/http_client/pool.rb:326:in `block in Pool'",
 "/opt/tvportal/elasticsearch/app/logstash-7.6.2/vendor/bundle/jruby/2.5.0/gems/logstash-output-elasticsearch-10.3.3-java/lib/logstash/outputs/elasticsearch/http_client.rb:352:in `template_put'", 
"/opt/tvportal/elasticsearch/app/logstash-7.6.2/vendor/bundle/jruby/2.5.0/gems/logstash-output-elasticsearch-10.3.3-java/lib/logstash/outputs/elasticsearch/http_client.rb:86:in `template_install'", 
"/opt/tvportal/elasticsearch/app/logstash-7.6.2/vendor/bundle/jruby/2.5.0/gems/logstash-output-elasticsearch-10.3.3-java/lib/logstash/outputs/elasticsearch/template_manager.rb:28:in `install'", 
"/opt/tvportal/elasticsearch/app/logstash-7.6.2/vendor/bundle/jruby/2.5.0/gems/logstash-output-elasticsearch-10.3.3-java/lib/logstash/outputs/elasticsearch/template_manager.rb:16:in `install_template'",
 "/opt/tvportal/elasticsearch/app/logstash-7.6.2/vendor/bundle/jruby/2.5.0/gems/logstash-output-elasticsearch-10.3.3-java/lib/logstash/outputs/elasticsearch/common.rb:197:in `install_template'", 
"/opt/tvportal/elasticsearch/app/logstash-7.6.2/vendor/bundle/jruby/2.5.0/gems/logstash-output-elasticsearch-10.3.3-java/lib/logstash/outputs/elasticsearch/common.rb:53:in `block in setup_after_successful_connection'"]}

Please guide. We are using version 7.6.2