how to set keepalive ?

[mr2qin]

• Version: 5.0.1
• Operating System: centos7
• Config File (if you have sensitive info, please remove it):

input {
    tcp {
        host => "0.0.0.0"
        port => 4561
        mode => "server"
        codec => json_lines
      }
}
output {
    stdout{codec =>rubydebug}
    elasticsearch {
        hosts => ["host1:9292","host2:9292"]
        flush_size => 10000
        idle_flush_time => 2
        index=>"logstash-task-%{taskId}-%{+YYYYMMdd}"
     }
}

Sometimes the client disconnected, but there is no disconnect the server side, 4561 the number of connections, has increased
https://discuss.elastic.co/t/logstash-input-tcp-keepalive/82375

[red8888]

I have the same problem. TCP keep alive needs to be implemented by the application and for some reason logstash doesn't implement it. You might have to switch to a different app if you need tcp keep alive support.

[kares]

the plugin supports the tcp_keep_alive => true configuration option (since 5.0.9 #116)