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JotForm is a free online form builder which helps you create online forms without writing a single line of code. No sign-up required.

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We believe that if one user has a question, there could be more users who may have the same question. This is why many of our support forum threads are public and available to be searched and viewed. If you’d like help immediately, feel free to search for a similar question, or submit your question or concern.

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    Getting "Error 503 Backend fetch failed" on live form

    Asked by orhanmelihunlu on January 13, 2016 at 07:32 AM


    I'm having a problem with URL. When I click to my form it shows that Error;

    Error 503 Backend fetch failed

    Backend fetch failed

    Guru Meditation:


    XID: 1575923

    How can I solve this?

    Page URL:

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    Answered by victor on January 13, 2016 at 11:10 AM

    Sorry for the inconvenience. I have just verified your page and was able to view the form properly. If you are still experiencing the issue, please let us know and we will be glad to help.

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    Answered by nima  on October 22, 2016 at 10:58 AM

    The solution to this issue is quite simple. It occurs often on Apache servers and it’s all due to the KeepAlive directive.

    Edit /etc/apache2/apache2.conf

    KeepAlive On Change to KeepAlive Off



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    Answered by Nima  on October 22, 2016 at 11:00 AM

    Open your Varnish configuration file (mine was in /etc/varnish/user.vcl) and add these lines:

    backend default { .host = "";   .port = "8888"; .connect_timeout = 1s; # Wait a maximum of 1s for backend connection (Apache, Nginx, etc...) .first_byte_timeout = 5s; # Wait a maximum of 5s for the first byte to come from your backend .between_bytes_timeout = 2s; # Wait a maximum of 2s between each bytes sent }

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