Unfortunately this may be a deal breaker for us. This NFS failure in our production environment would be a huge issue. The lack of ability to troubleshoot this issue due to lack of logs and the requirement for manual disabling and re-enabling of the service will be extremely problematic.
If it fails, it is logged in the dmesg log, and this can be accessed from the DSS webgui.
However, it is unusual this would fail on a regular basis. If it does, I suspect other problems that can also be troubleshooted with support engineers.