[GitHub] [maven-javadoc-plugin] cowwoc edited a comment on pull request #104: [MJAVADOC-694] Avoid empty warn message from getResolvePathResult

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cowwoc edited a comment on pull request #104:
URL: https://github.com/apache/maven-javadoc-plugin/pull/104#issuecomment-1014134830


   @rfscholte Are you sure that `<jdkToolchain>` works properly? @slawekjaranowski mentioned there are no tests for it and when I run the following with JDK 8:
   
   ```
   <plugin>
   	<groupId>org.apache.maven.plugins</groupId>
   	<artifactId>maven-javadoc-plugin</artifactId>
           <version>3.3.1</version>
   	<executions>
   		<execution>
   			<id>attach-javadocs</id>
   			<goals>
   				<goal>jar</goal>
   			</goals>
   			<configuration>
   				<jdkToolchain>
   					<version>11</version>
   				</jdkToolchain>
   				<!-- ... --->
   		</execution>
   	</executions>
   </plugin>
   ```
   
   I get:
   
   ```
   [INFO] Toolchain in maven-javadoc-plugin: JDK[C:\Program Files\Java\jdk-11.0.2]
   org.apache.maven.lifecycle.LifecycleExecutionException: Failed to execute goal org.apache.maven.plugins:maven-javadoc-plugin:3.3.1:jar (attach-javadocs) on project core: Execution attach-javadocs of goal org.apache.maven.plugins:maven-javadoc-plugin:3.3.1:jar failed.
   [...]
   Caused by: java.lang.UnsupportedOperationException
       at org.codehaus.plexus.languages.java.jpms.CmdModuleNameExtractor.getModuleName (CmdModuleNameExtractor.java:46)
   ```
   
   I tried running against `3.3.2-SNAPSHOT` from Maven Central and got the same result.
   
   The exception seems to imply that JDK 8 is being used in spite of the JDK 11 toolchain resolving properly. Should I open a separate bug report for this?


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