The second of Microsoft's early OLAP registrations, and just as dormant as the first.
IANA registers 2394 as ms-olap2, "MS OLAP 2", registered by Microsoft's Analysis Services team next to ms-olap1 on 2393. Microsoft's current Analysis Services firewall documentation names only TCP 2383 (default instance) and TCP 2382 (SQL Server Browser), so 2394 does not correspond to anything a supported SQL Server installs. Identify any listener here by process; the registry name will not tell you what it is.
Do not expose
Either an unidentified service or a legacy database listener — keep it off public interfaces either way.
$ sudo lsof -nP -iTCP:2394 -sTCP:LISTENSeen this on your network? Beige Box scans your Wi-Fi and shows every open port on every device — and its Ports tool links straight back here.
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Corrections or a missing port? Reply @rimrocksystems.