Can't have multiple input syslog

[endersonmaia]

Relevant telegraf.conf:

telegraf.conf

[[inputs.syslog]]
  server = "udp://localhost:6514"
[[inputs.syslog]]
  server = "tcp://localhost:6514"

[[outputs.file]]
  files = [ "stdout" ]

System info:

I have a docker stack for a simple telegraf that listens for syslog packets and outputs to stdout

docker-compose.yml

version: '3.6'

networks:
  monitoring:

configs:
  telegraf.conf:
    external: true

services:
  # Define a Telegraf service
  telegraf:
    image: telegraf
    configs:
      - source: telegraf.conf
        target: /etc/telegraf/telegraf.conf
    networks:
      - monitoring
    ports:
      - "8092:8092/udp"
      - "8094:8094"
      - "8125:8125/udp"
      - "6514:6514"
      - "6514:6514/udp"

Steps to reproduce:

1. Run this stack

docker config create telegraf.conf ./telegraf.conf
docker stack deploy -c docker-compose.yml tick

2. Se the logs

docker service logs tick_telegraf

Expected behavior:

According to the documentation, it should be possible to have multiple input plugins.

I'm getting the following logs and the container keeps restarting.

Actual behavior:

 I! Starting Telegraf 1.9.3,
 I! Using config file: /etc/telegraf/telegraf.conf,
 I! Loaded inputs: inputs.syslog inputs.syslog,
 I! Loaded aggregators: ,
 I! Loaded processors: ,
 I! Loaded outputs: file,
 I! Tags enabled: host=e4b1b569c08d,
 I! [agent] Config: Interval:10s, Quiet:false, Hostname:"e4b1b569c08d", Flush Interval:10s,
 E! [agent] Service for input inputs.syslog failed to start: missing protocol within address ':6514',
 E! [telegraf] Error running agent: missing protocol within address ':6514',

Additional info:

When I try just with a single [[input.syslog]] it works fine.

Single TCP

After starting the stack with a single TCP

[[inputs.syslog]]
  server = "tcp://localhost:6514"

after running echo "57 <13>1 2018-10-01T12:00:00.0Z example.org root - - - test" | nc 127.0.0.1 6514

I get

2019-02-02T23:16:23Z I! Starting Telegraf 1.9.3,
2019-02-02T23:16:23Z I! Using config file: /etc/telegraf/telegraf.conf,
2019-02-02T23:16:23Z I! Loaded inputs: inputs.syslog,
2019-02-02T23:16:23Z I! Loaded aggregators: ,
2019-02-02T23:16:23Z I! Loaded processors: ,
2019-02-02T23:16:23Z I! Loaded outputs: file,
2019-02-02T23:16:23Z I! Tags enabled: host=f158f7e23400,
2019-02-02T23:16:23Z I! [agent] Config: Interval:10s, Quiet:false, Hostname:"f158f7e23400", Flush Interval:10s,
syslog,appname=root,facility=user,host=f158f7e23400,hostname=example.org,severity=notice version=1i,severity_code=5i,facility_code=1i,timestamp=1538395200000000000i,message="test" 1549149411602523900,
syslog,appname=root,facility=user,host=f158f7e23400,hostname=example.org,severity=notice version=1i,severity_code=5i,facility_code=1i,timestamp=1538395200000000000i,message="test" 1549149444157521600,

Single UDP

With UDP it works with some errors in the plugin, but it seems to get the message (maybe another bug?).

After starting the stack with a single UDP

after running echo "<13>1 2018-10-01T12:00:00.0Z example.org root - - - test" | nc -u 127.0.0.1 6514

[[inputs.syslog]]
  server = "udp://localhost:6514"

2019-02-02T23:12:19Z I! Starting Telegraf 1.9.3,
2019-02-02T23:12:19Z I! Using config file: /etc/telegraf/telegraf.conf,
2019-02-02T23:12:19Z I! Loaded inputs: inputs.syslog,
2019-02-02T23:12:19Z I! Loaded aggregators: ,
2019-02-02T23:12:19Z I! Loaded processors: ,
2019-02-02T23:12:19Z I! Loaded outputs: file,
2019-02-02T23:12:19Z I! Tags enabled: host=877526f8951d,
2019-02-02T23:12:19Z I! [agent] Config: Interval:10s, Quiet:false, Hostname:"877526f8951d", Flush Interval:10s,
2019-02-02T23:12:22Z E! [inputs.syslog]: Error in plugin: expecting a priority value within angle brackets [col 0],
2019-02-02T23:12:22Z E! [inputs.syslog]: Error in plugin: expecting a priority value within angle brackets [col 0],
2019-02-02T23:12:22Z E! [inputs.syslog]: Error in plugin: expecting a priority value within angle brackets [col 0],
2019-02-02T23:12:22Z E! [inputs.syslog]: Error in plugin: expecting a priority value within angle brackets [col 0],
syslog,appname=root,facility=user,host=877526f8951d,hostname=example.org,severity=notice facility_code=1i,timestamp=1538395200000000000i,message="test",version=1i,severity_code=5i 1549149142336317200,
2019-02-02T23:12:36Z E! [inputs.syslog]: Error in plugin: expecting a priority value within angle brackets [col 0],
2019-02-02T23:12:36Z E! [inputs.syslog]: Error in plugin: expecting a priority value within angle brackets [col 0],
2019-02-02T23:12:36Z E! [inputs.syslog]: Error in plugin: expecting a priority value within angle brackets [col 0],
2019-02-02T23:12:36Z E! [inputs.syslog]: Error in plugin: expecting a priority value within angle brackets [col 0],
syslog,appname=root,facility=user,host=877526f8951d,hostname=example.org,severity=notice version=1i,severity_code=5i,facility_code=1i,timestamp=1538395200000000000i,message="test" 1549149156288226500,