How to send multiline json file and send it to elasticsearch

Elastic Stack Logstash
2

Welcome to the community!

Can you provide us with a sample?

There is multiline codec as well as json codec. You should have something like this

input {
  file {
    path => ['/path/file.json']
    codec => multiline {
        pattern => '^{'
        negate => true
        what => previous
    }
  }
}
filter {
 json {
    source => "message"
  }
}