Unusual Server error

My environment runs 10.0.2. The other night I saw an odd error that I’d never seen before in the root server log.

/cgi-bin/bfenterprise/PostResults.exe (6200) - PostResults error: wrong final block length (class BIOReadFailed)

The environment ‘locked up’ with all computers gray in the console. All services were running on the root server.

Cycling the root server service resolved the issue. It felt like a deadlock, however the server log didn’t show any signs of one. I’d be grateful for any insight. L2 support seems stumped.