Logstash avro reader gives empty results

[rahulkothanath (Rahul)]

I want to read a avro files from kafka topics and insert into elastic search.
when I am reading avro files and showing results(codec=>json) ,it gives empty.
below is my configuration:

input
{
kafka {
bootstrap_servers =>"servers"
topics => ["topic"]
group_id => "group id"
auto_offset_reset => "latest"


    codec => avro {
        schema_uri => "/app/kn00/logstash-7.0.0/schemas/abc/abc_schema_writer.avsc"
    }

jaas_path => "/app/logstash-7.0.0/zookeeper-jaas_tmx.conf"
sasl_kerberos_service_name => "kafka"
kerberos_config => "/app/logstash-7.0.0/krb5.conf"
#sasl_mechanism => "PLAIN"
security_protocol => "SASL_SSL"
ssl_truststore_location => "/app/kafka-security.jks"
ssl_truststore_password => ""
}
}

output {

stdout{ codec => json }


    elasticsearch {
      hosts => ['url']
       user => 'abcedf'
       password => ''
       ssl => true
       truststore => "/app/kafka-security.jks"
      truststore_password => ""
       index => "dev_abc_error"
      # document_id => ""
       document_type => "_doc"
 }}

and the output is like below:
/app/logstash-7.0.0/vendor/bundle/jruby/2.5.0/gems/awesome_print-1.7.0/lib/awesome_print/formatters/base_formatter.rb:31: warning: constant ::Fixnum is deprecated
{
"name" => "",
"value" => "",
"@version" => "1",
"@timestamp" => 2019-06-03T17:19:31.204Z
}
{
"name" => "",
"value" => "",
"@version" => "1",
"@timestamp" => 2019-06-03T17:19:31.221Z
}

I am able to read the same avro records using NiFi and able to index into elastic search.

thanks for reading and helping