I have seen this since I installed this product, but when I have the VCO client up, sometimes the workflows I run, does not matter which ones do not complete unless I close the VCO client. I have rebuilt my VCO appliance and still have the same issues from time to time. The only common denominator is the database. I also am seeing my appliance fill up %100 rendering it useless and has to be rebuilt.
The apache logs are what fills it up.
Thank you
-Stephen