When running javadoc on a specific module, with only that module on the module source path, it is observed to generate the following messages:

javadoc: warning - module compiler not found.
javadoc: warning - module compiler not found.
2 warnings

There are various issues here:

1. Only the simple name of the module is being reported
2. The message is misleading: what it means is that the *source* for the module cannot be found, not the module itself
3. The message is reported multiple times