Go with the Google drive document converter instead. It works flawlessly. I wish it would convert documents a little faster, but overall it's a big improvement over trying to get UNOCONV to work.
See:
https://docs.moodle.org/33/en/Google_Drive_converter
Friends I saw the topic many similar things but my problem, but I did not find anything similar to my symptom. I use CentOS 7 and Moodle 3.3.2+, I can not use Google to do the conversions of my pdfs, so I use unoconv, but in some cases cases the files in word simply crash in mysql and do not suffer the conversion to pdf and with that the bank simply stops and converts neither the current nor the next. When deleting the one that is locking the mysql the others return to work.
