Everything is working fine, but I am puzzled as to what's going on with these warnings.
When I run the wsimport goal, for each of my project's test dependencies it reports that it "cannot find file".
[INFO] --- jaxws-maven-plugin:2.3:wsimport (default-cli) @ my-project ---
[WARNING] cannot find file for com.realvnc.services:test-utils
[WARNING] cannot find file for org.cassandraunit:cassandra-unit
[WARNING] cannot find file for org.springframework.ws:spring-ws-test
[WARNING] cannot find file for com.jayway.jsonpath:json-path
[INFO] ------------------------------------------------------------------------
[INFO] BUILD SUCCESS
[INFO] ------------------------------------------------------------------------
Questions:
What exactly is this file and what is looking for it?
Is this symptomatic of some problem I haven't noticed yet?
Is there a way to remove these warnings?
It looks like you are experiencing an already reported bug:
WsImportMojo: warning "cannot find file for" for test artefacts
The issue is still open (at the time of writing) and fix would be probably availabled with version 2.5.2-SNAPSHOT (no yet released and hence not available on Maven Central).
Hence, concerning your questions:
What exactly is this file and what is looking for it?
The warning is issued in this line while scanning for artifacts (dependencies) but not filtering by scope (test and provided should indeed be ignored) or optional dependencies.
Is this symptomatic of some problem I haven't noticed yet?
No, you can ignore it. It will be gone in future versions.
Is there a way to remove these warnings?
No, for the moment. Again, they will be gone in a future version.