Failed to upload PDF files

[alex.chan]

I was trying to upload files to a File List, .XLSX files were uploaded without problem, however, whenever I try to upload .PDF files, it always failed.

Error message: Invalid response received from the server.

[Adam Brokes · Accepted solution]

Hi Alex,

I've tried to reproduce this on Confluence 6.9 and in Confluence Cloud with several different PDF files but I wasn't able to see the error that you got in your instance. I was able to upload the files without any issues and display them afterward. Can you please provide additional information?

Did you follow this documentation: Cloud documentation or Server documentation?

What is your Confluence platform/version and what is the size of the files you are trying to upload?

Thank you,

Adam

[Renan Battaglin]

Hi Alex, you may also want to check if the problem has anything to do with the size limits the instance administrator may have configured for attachment uploads.

Also, if this is a Server instance, the admin would be able to see what other messages are logged in the log file when you try to upload the PDF.

Cheers,

Renan

[alex.chan]

OK, thanks for the hint.

I found out the file size limit is from nginx which is sitting in front of Confluence.

It works now.

[Jerome McHugh]

If behind an NGINX proxy server

In the configuration file in /etc/nginx/sites-enabled directory for the appropriate config file in the server section, add or update the client_max_body_size directive using an appropriate maximum size such as 100M to limit uploads to a maximum size of 100 Megabytes. The default when not explicitly specified is 1M

client_max_body_size 100M

server { 
    listen 443 ssl; 
    server_name your_site.net; 
    client_max_body_size 100M; 

[alex.chan]

Confluence version is 6.8.1

As I've checked the setting, which is the default value:

Attachment Settings

Attachment Maximum Size: 100.00 MB

Allows you to set the maximum size for each attachment uploaded to the site.

Maximum Attachments per Upload: 5

[Sarah]

Hi Alex,

Can you provide some information on what version of Confluence you are using? Is it Confluence Cloud or Confluence Server? Where does the error occur on the page?

Cheers,

Ben

[alex.chan]

I found out it's a size limit problem with nginx which is sitting in front of Confluence.