I have a large dashboard that has 10 different searches on it. This is scheduled to generate a report via the PDF report server each day at 3am. I'm only getting a PDF from 2 out of 10 days. For the ones that fail, I get this error within the email:
An error occurred while generating a PDF of this report:
Failed to generate PDF: Appserver failed to dispatch report request to https://172.16.253.141:8089/services/pdfserver/renderpdf: Splunkd daemon is not responding: ('The read operation timed out',)
Is it possible that the report is taking too long to render and the server times out? When I view the dashboard in the browser, all the searches finish within 1 minute.
Did you already try increasing the timeout? Try
firefox_timeout = 400
in pdf_server.conf on the server.
Here's a doc link for troubleshooting the PDF Server app: http://docs.splunk.com/Documentation/Splunk/latest/Troubleshooting/PDFTS
This worked for me.