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

Last updated on MAY 18, 2021

Applies to:

Oracle WebCenter Portal - Version 12.2.1.4.0 and later
Information in this document applies to any platform.

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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In this Document
Symptoms
Changes
Cause
Solution
References


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