After a while our vendor daemon writes the following in the log:
This license server system can handle no more concurrent clients since it is out of file descriptors. We recommend splitting your licenses among more license server systems and using a license-file list so FLEXenabled applications can checkout from more servers. Although, more license server systems will improve response. Please see www.macrovision.com or your vendor for more information.
and needs to be restarted; running lsof, i get a ton of lines like this:
