Telegraf fails starting with MQTT consumer is connection_timeout is not defined

[dinacel]

Bug report

Relevant telegraf.conf:

[[inputs.mqtt_consumer]]

   ## Connection timeout for initial connection in seconds
   connection_timeout = "30s"

System info:

Telegraf version 1.4.1-1

root@local:~# apt-cache policy telegraf
telegraf:
  Installed: 1.4.1-1
  Candidate: 1.4.1-1
  Version table:
 *** 1.4.1-1 0
        900 https://repos.influxdata.com/debian/ jessie/stable amd64 Packages
        100 /var/lib/dpkg/status

Steps to reproduce:

1. Remove or comment "connection_timeout" parameter in the telegraf.conf (or upgrade telegraf from a previous version).
2. Restart telegraf.

Expected behavior:

Telegraf start.

Actual behavior:

Telegraf fails starting with a message in the logs :

MQTT Consumer, invalid connection_timeout value: {0}

[danielnelson]

Sorry about this regression, we have a fix for this in 1.4.2. #3284