Document Preview is Blank for some Documents due to 404 Errors / WCPageNotFound.jsp Related to "imagingservice" URL (Doc ID 2777292.1)

Last updated on SEPTEMBER 30, 2022

Applies to:

Symptoms

ACTUAL BEHAVIOR

Document Manager previews are not loading for some documents.
When attempting to view a document it shows blank.

Reuploading the same document as new in the same folder works.

The newly uploaded document may work fine for some time but eventually will also fail to show the preview.

EXPECTED BEHAVIOR

Expect to see the preview for all documents. 

TESTCASE STEPS

The issue happens only for some documents.
For affected documents the issue can be reproduced as follows: 

1. Connect to WebCenter Portal.  
    
2. Navigate to the affected portal.  
    
3. Open a page with the Content Manager Task Flow (or the documents page).  
    
4. Click on the affected document.
   The document preview will open but the document preview is blank. 
    
5. Download that document. 
    
6. Upload the document to the same folder as a new file.  
    
7. View the document.
   The document preview correctly shows the document.  
    
8. Collect HTTP headers from the working and not working documents (view the documents using Chrome and enable the Development Tools > View entries in the Network Tab). 
   The following is displayed: 
    
   Failing document
    
   It generates a 302 code when doing a call on imagingservice.
   
   
   General
   Request URL:
   https://<HOST>:<PORT>/webcenter/imagingservice?c=g&i=Default...
   Request Method: GET
   Status Code: 302 Moved Temporarily
   Remote Address: <IP_ADDRESS>:<PORT>

   Response Headers
   Request URL:
   https://<HOST>:<PORT>/webcenter/imagingservice?c=g&i=Default...
   Request Method: GET
   Status Code: 302 Moved Temporarily
   Remote Address: <IP_ADDRESS>:<PORT>
   Age: 0
   Cache-Control: no-cache
   Connection: keep-alive
   Content-Length: 307
   Content-Security-Policy
   Content-Type: text/html; charset=ISO-8859-1
   Date: <DATE>
   Location: https://<HOST>:<PORT>/webcenter/system/WCPageNotFound.jsp 

   
   
   Accessing the referenced imagingservice URL directly on the browser returns "Page Not Found...".
   
   
   https://<HOST>:<PORT>/webcenter/imagingservice?c=g&i=Default&...
    

   Working document
   
   This returns 200 code.

   Request URL:
   https://<HOST>:<PORT>/webcenter/imagingservice?c=g&i=Default&...
   Request Method: GET
   Status Code: 200 OK
   Remote Address: <IP_ADDRESS>:<PORT>
   Age: 1

   Response Headers
   Cache-Control: no-cache
   Cache-Control: no-cache
   Connection: close
   Content-Security-Policy
   Content-Type: image/png
   Date: <DATE> 

Changes

Cause

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