The default HTTP port for Open Liberty and WebSphere Liberty Java application servers.
Open Liberty and IBM WebSphere Liberty ship with HTTP on 9080 and HTTPS on 9443, so a Java shop's application servers, and the sample apps in their tutorials, all answer here. Anything else that needs a second HTTP-alt port also reaches for 9080 because it reads as "80, but higher". IANA registers the port as glrpc (Groove GLRPC), a Microsoft Groove component you will not encounter now.
Expose with care
Legitimate as an application listener, but it is plain HTTP — put TLS termination and access control in front of it rather than publishing 9080 directly.
$ curl -sI http://TARGET:9080/Seen 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.