Error occurred! {:error=>#<NoMethodError: undefined method `<' for nil:NilClass>

Elastic Stack Logstash
1

I'm getting this error using lostash 6.0.1 docker image.

The pipeline configuration I'm using is:

input {
  #udp {
  #  port  => 5000
  #  codec => json
  #}
 tcp {
    port  => 5000
    codec => json
  }
}


filter {
  grok {
    match => { "message" => "%{TIMESTAMP_ISO8601:time}\|%{LOGLEVEL:loglevel}\|%{DATA:logger}\|(?<message>(?m:.*))" }
  }
  multiline {
    pattern => "%{TIMESTAMP_ISO8601}"
    negate => true
    what => previous
  }

}


output {
  elasticsearch {
    hosts => [""]
    ssl => true
  }

}
2

Please show the full error message.

3

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