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All websites/webmails on Plesk for Linux server show error 502 every hour or even constantly

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Mikhail Shport
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Plesk for Linux kb: fixed kb: bug ext: sslit

Applicable to:

  • Plesk for Linux

Symptoms

  • On a Plesk for Linux server, all websites/webmails show error 502 every hour or even constantly.

  • Apache restarts repeatedly for a while:

    # journalctl -u httpd | grep "Stopping\|Starting"
    plesk.example.com systemd[1]: Stopping The Apache HTTP Server...
    plesk.example.com systemd[1]: Starting The Apache HTTP Server...
    plesk.example.com systemd[1]: Stopping The Apache HTTP Server...
    plesk.example.com systemd[1]: Starting The Apache HTTP Server...
    plesk.example.com systemd[1]: Stopping The Apache HTTP Server...
    plesk.example.com systemd[1]: Starting The Apache HTTP Server...
    ...

  • SSL It! extension was updated to version 1.8.4-1208.

Cause

Product issue:

  • #EXTSSLIT-1645 "The extension no longer reassigns an already issued Let’s Encrypt certificate to a domain every hour if its mail component should not be secured."
    Fixed in:

Resolution

Please consider updating your server:

Comments

2 comments

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    Simon Wick

    Despite the update, I still have the problem. I use the LiteSpeed ​​extension as a web server instead of Apache. Does that have an impact? Are there other approaches? Thanks for the help! All websites are offline for about 1 minute every hour ...

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    Lrnt

    Thank you for this! That helps me a lot because I had nginx 502 Bad Gateway each hour at 58 minutes.

    But I updated the SSL It! Extension since v1.8.5-1210 seems to resolv this issue: 

    1.8.5 (12 June 2021)

    • [-] The extension no longer reassigns an already issued Let's Encrypt certificate to a domain every hour if its mail component should not be secured. (EXTSSLIT-1645)
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