[MDEP-874] Warning: Could not get javadoc URL for reference FileMapper at FullyQualifiedJavadocReference

**[Elliotte Rusty Harold](https://issues.apache.org/jira/secure/ViewProfile.jspa?name=elharo)** opened **[MDEP-874](https://issues.apache.org/jira/browse/MDEP-874?redirect=false)** and commented

seen in build

[INFO] --- plugin:3.7.0:descriptor (default-descriptor) @ maven-dependency-plugin ---
[INFO] Using 'UTF-8' encoding to read mojo source files.
Warning: Could not get javadoc URL for reference StrictPatternExcludesArtifactFilter at FullyQualifiedJavadocReference [moduleName=Optional.empty, packageName=Optional[org.apache.maven.shared.artifact.filter], className=Optional[StrictPatternExcludesArtifactFilter], memberType=Optional.empty, member=Optional.empty, label=Optional.empty, isExternal=true] (fully qualified src/main/java/org/apache/maven/plugins/dependency/tree/TreeMojo.java:214): Found no javadoc site for FullyQualifiedJavadocReference [moduleName=Optional.empty, packageName=Optional[org.apache.maven.shared.artifact.filter], className=Optional[StrictPatternExcludesArtifactFilter], memberType=Optional.empty, member=Optional.empty, label=Optional.empty, isExternal=true]
Warning: Could not get javadoc URL for reference StrictPatternIncludesArtifactFilter at FullyQualifiedJavadocReference [moduleName=Optional.empty, packageName=Optional[org.apache.maven.shared.artifact.filter], className=Optional[StrictPatternIncludesArtifactFilter], memberType=Optional.empty, member=Optional.empty, label=Optional.empty, isExternal=true] (fully qualified src/main/java/org/apache/maven/plugins/dependency/tree/TreeMojo.java:193): Found no javadoc site for FullyQualifiedJavadocReference [moduleName=Optional.empty, packageName=Optional[org.apache.maven.shared.artifact.filter], className=Optional[StrictPatternIncludesArtifactFilter], memberType=Optional.empty, member=Optional.empty, label=Optional.empty, isExternal=true]
Warning: Could not get javadoc URL for reference ProjectDependencyAnalyzer at FullyQualifiedJavadocReference [moduleName=Optional.empty, packageName=Optional[org.apache.maven.shared.dependency.analyzer], className=Optional[ProjectDependencyAnalyzer], memberType=Optional.empty, member=Optional.empty, label=Optional.empty, isExternal=true] (fully qualified src/main/java/org/apache/maven/plugins/dependency/analyze/AbstractAnalyzeMojo.java:56): Found no javadoc site for FullyQualifiedJavadocReference [moduleName=Optional.empty, packageName=Optional[org.apache.maven.shared.dependency.analyzer], className=Optional[ProjectDependencyAnalyzer], memberType=Optional.empty, member=Optional.empty, label=Optional.empty, isExternal=true]
Warning: Could not get javadoc URL for reference FileMapper at FullyQualifiedJavadocReference [moduleName=Optional.empty, packageName=Optional[org.codehaus.plexus.components.io.filemappers], className=Optional[FileMapper], memberType=Optional.empty, member=Optional.empty, label=Optional.empty, isExternal=true] (fully qualified src/main/java/org/apache/maven/plugins/dependency/fromConfiguration/UnpackMojo.java:90): Found no javadoc site for FullyQualifiedJavadocReference [moduleName=Optional.empty, packageName=Optional[org.codehaus.plexus.components.io.filemappers], className=Optional[FileMapper], memberType=Optional.empty, member=Optional.empty, label=Optional.empty, isExternal=true]
Warning: Could not get javadoc URL for reference FileMapper at FullyQualifiedJavadocReference [moduleName=Optional.empty, packageName=Optional[org.codehaus.plexus.components.io.filemappers], className=Optional[FileMapper], memberType=Optional.empty, member=Optional.empty, label=Optional.empty, isExternal=true] (fully qualified src/main/java/org/apache/maven/plugins/dependency/fromDependencies/UnpackDependenciesMojo.java:98): Found no javadoc site for FullyQualifiedJavadocReference [moduleName=Optional.empty, packageName=Optional[org.codehaus.plexus.components.io.filemappers], className=Optional[FileMapper], memberType=Optional.empty, member=Optional.empty, label=Optional.empty, isExternal=true]

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No further details from [MDEP-874](https://issues.apache.org/jira/browse/MDEP-874?redirect=false)

Start by reproducing the plugin:3.7.0:descriptor build and review the warnings for TreeMojo.java, AbstractAnalyzeMojo.java, UnpackMojo.java, and UnpackDependenciesMojo.java. Trace the reported FullyQualifiedJavadocReference entries, including FileMapper, to determine why their Javadoc sites are not found. Done means the affected build no longer emits these warnings or the expected handling is documented by tests.

Written by the indexing model from the issue text.