Stale rtm connection reconnect is failing

[PrajaktaNaik]

Hi I am using the botkit v 0.5.8
I am getting this stale connection error for my chatbot on slack..i have set the reconnect config to true and tried to debug the issue. It was able to reconnect the first time, but again there was a stale connection, the reconnect attempts failed and the bot went down. Below is the error log:

error: Error: Stale RTM connection, closing RTM
inside bot.closeRTM slackbot_worker.js
inside bot.closeRTM slackbot_worker.js pingTimeoutId[object Object]
** The RTM api just closed

*** 2017-09-11T12:53:13-07:00 ** The RTM api just closed
info: ** API CALL: https://slack.com/api/chat.postMessage
inside if(err && retryEnabled) slackbot_worker.js err is Error: Stale RTM connection, closing RTMretryEnabled is true
Error in Botkit Studio Stats: { [Error: connect ENETDOWN 159.203.98.199:443 - Local (10.254.186.86:62550)]
code: 'ENETDOWN',
errno: 'ENETDOWN',
syscall: 'connect',
address: '159.203.98.199',
port: 443 }
inside the reconnect function
notice: ** BOT ID: whizbot ...reconnect attempt #1 of true being made after 1000ms
inside bot.startRTM function slack_worker.js
info: ** API CALL: https://slack.com/api/rtm.start
startRTM is called from reconnect
error inside startRTM, calling reconnect again errError: getaddrinfo ENOTFOUND slack.com slack.com:443destroyed false
error: ** BOT ID: whizbot ...reconnect failed after #2 attempts and 1000ms

After this the bot was down. Could some one provide some suggestion to keep the bot alive forever.