502 bad gateway after root password reset

December 7, 2018 653 views
WordPress Ubuntu 16.04
44expressapp
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44expressapp

After reseting the password the wordpress site went offline with error 502, the nginx log error indicates that

"listen () to [::] :80, backlog 511 failed (98: adress already in use) "

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1 Answer
Nair December 8, 2018

Looks like port 80 is not released by whichever process was running earlier.

So, kill that process with:

sudo fuser -k 80/tcp

Then restart Nginx.

Curiously I've seen this "backlog 511" error in Plesk. Do you use Plesk? If so, switch off and on Nginx by going to Tools & Settings > Services Management.

If that didn't work, tell us exactly what password you changed.

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  • kaspar April 2, 2019 
    sudo: fuser: command not found

    on CentOS

    • kaspar April 2, 2019

      Got it done with fuser and restarted nging but still no luck... other sites on same server work - just one KeystoneJS site went down after password reset.

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