Restarting due to task timeout

We have been using LibreOffice with JODConverterLocal to convert word document to pdf with multiple complex languages inside. But we encountered an issue stated in the title and unable to generate pdf document. How to debug this issue? Is it because the number of connections is high at that time?

Opening/Starting the LibreOffice is consuming time, so we never close/stop the officeManager. Could this be an issue?