Issue Summary

Uploading a large file on the attachments screen times out

Steps to Reproduce

Via Page's Attachment List

1. Log in to Confluence and navigate to the "Attachments" screen of an existing page (created one if needed). (The screen corresponds to this action: viewpageattachments.action)
2. Check that the attachment size limit is 100MB.
3. Try to upload a file that is over the limit, e.g. 300MB.

Via Attachments Macro
While the UI doesn't timeout, but a different method of uploading attachment over the size limit also fails (with a different behavior):

1. Create a page and insert an Attachments Macro, then publish the page
2. On the page's View Mode, click "browse for files" on the Attachment Macro, and select a file larger than the attachment maximum size to upload

Optional
The optional steps below can be done for easier replication:

1. Go to General Configuration
2. Click "Edit" under Attachment Settings
3. Modify the "Attachment Maximum Size" to a much smaller size (eg: 1MB)

Expected Results

The screen should show an error saying the file was too large to upload.

Uploading attachment via Drag and Drop into the Attachments Macro is displayed with a meaningful warning message:

Actual Results

Via Page's Attachment List
The request retries and times out,

• Firefox
  • 
• Chrome
  • 

When inspect from browser's developer tool, the POST request to /pages/doattachfile.action?pageId=12345 is not getting any response

Via Attachments Macro
No error message is shown to the user, and the macro loads indefinitely:

When inspect from browser's developer tool, the POST request to /pages/plugins/attachments/doattachfile.action?pageId=12345 is not getting any response

Workaround

Upload using the editor upload dialog instead, or via "Drag and Drop" method in Attachments Macro