Stuck Threads Crippling Performance and Large PDF Documents Not Fully Loading In The ADF Viewer Content UI
(Doc ID 2618392.1)
Last updated on MARCH 10, 2020
Applies to:Oracle WebCenter Content - Version 18.104.22.168.0 and later
Information in this document applies to any platform.
Large PDF documents are not fully loading in the ADF viewer Content UI when clicking in the Content Information page in Native UI or when logging into ADF UI.
Performance issues when loading content in ADF UI due to a very high count of stuck threads, which is resulting in the situations where the Content Server becomes unusable and needs to be restarted regularly.
On the ADF UI, user(s) see either of the following error messages in ADF UI on opening content:
a. 'Cannot display document because it could not be successfully converted.'
b. 'The document could not be fully rendered within the allotted time. To view the full document, either open the web-viewable rendition or download the native file.'
c. 'There are no pages to display in the document.'
Issue can be replicated by executing the below steps:-
1. Enable some system audit tracing:
a. Login to the content server as administrator
b. Navigate to the System Audit Information Page under Administration
c. Scroll towards the bottom of the page where the tracing sections are visible
d. Clear all existing entries
e. Using the drop down choices select - fileaccess,indexer,dynamicconverter,requestaudit
f. Check the verbose and save check-boxes.
2. Check-in large documents thru the Native UI.
3. Log onto the Content UI and open each simultaneously in new tabs. Or open the WCC viewer link from the Content Information page.
4. Documents show different results:
a. Few show error - "Cannot display document because it could not be successfully converted." and few show - "There are no pages to display in the document."
b. For files with significantly higher number of pages following is seen:
"The document could not be fully rendered within the allotted time. To view the full document, either open the web-viewable rendition or download the native file"
c. Others display error - "There are no pages to display in the document."
d. Some (containing 400 or more pages) show only one page preview and has notification - "Entering single page navigation mode as the document page count exceeds continuous scroll limit."
Admins see multiple instances of following thread waiting on another thread(s) to complete throughout the logs are observed:
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