fluent-bit: [error] net_tcp_connect: Can't get addr info

Fluentbit container exits after few mins of starting, and getting Can’t get addr info

/fluent-bit # cat log/fluent-bit.log
[2017/04/04 16:20:25] [ info] [engine] started
[2017/04/04 16:20:25] [ info] [in_fw] binding 0.0.0.0:24224
[2017/04/04 16:20:35] [error] net_tcp_connect: Can't get addr info
[2017/04/04 16:20:40] [error] net_tcp_connect: Can't get addr info
[2017/04/04 16:20:50] [error] net_tcp_connect: Can't get addr info
[2017/04/04 16:20:55] [error] net_tcp_connect: Can't get addr info
[2017/04/04 16:23:14] [ info] [engine] started
[2017/04/04 16:23:14] [ info] [in_fw] binding 0.0.0.0:24224
[2017/04/04 16:23:59] [error] net_tcp_connect: Can't get addr info
[2017/04/04 16:24:15] [ info] [engine] started
[2017/04/04 16:24:15] [ info] [in_fw] binding 0.0.0.0:24224
[2017/04/04 16:26:36] [ info] [engine] started
[2017/04/04 16:26:36] [ info] [in_fw] binding 0.0.0.0:24224
[2017/04/04 16:27:06] [error] net_tcp_connect: Can't get addr info
[2017/04/04 21:36:41] [ info] [engine] started
[2017/04/04 21:36:41] [ info] [in_fw] binding 0.0.0.0:24224
[2017/04/04 21:49:41] [error] net_tcp_connect: Can't get addr info
[2017/04/04 21:51:20] [ info] [engine] started
[2017/04/04 21:51:20] [ info] [in_fw] binding 0.0.0.0:24224
[2017/04/04 21:51:35] [error] net_tcp_connect: Can't get addr info
[2017/04/04 21:51:41] [ info] [engine] started
[2017/04/04 21:51:41] [ info] [in_fw] binding 0.0.0.0:24224
[2017/04/04 22:41:41] [error] net_tcp_connect: Can't get addr info
[2017/04/05 13:11:39] [ info] [engine] started
[2017/04/05 13:11:39] [ info] [in_fw] binding 0.0.0.0:24224

Inside of container, I am able to ping & telnet the ES endpoint, not sure what is the issue here, the error message is very generic and not explicit on what’s expectation for the endpoint here.

[SERVICE]
    Flush     5
    Daemon    Off
    Log_Level info
    Log_File  /fluent-bit/log/fluent-bit.log

[INPUT]
    Name Forward
    Port 24224

[INPUT]
    Name tail
    Path /app/logs/
    DB   /tmp/fluentbit_applogs.db

[INPUT]
    Name tail
    Path /var/lib/docker/containers/*.log
    DB   /tmp/fluentbit_docker.db

[OUTPUT]
    Name  stdout
    Match *

[OUTPUT]
    Name  es
    Match *
    Host  ${ELASTICSEARCH_HOST}
    Port  ${ELASTICSEARCH_PORT}
    Index fluentbit
    Logstash_Format true
    Logstash_prefix ${LOGSTASH_PREFIX}