Chris Nauroth created HADOOP-19856:
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             Summary: JDiff fails with IllegalAccessError on Java 17
                 Key: HADOOP-19856
                 URL: https://issues.apache.org/jira/browse/HADOOP-19856
             Project: Hadoop Common
          Issue Type: Bug
          Components: build
            Reporter: Chris Nauroth
            Assignee: Chris Nauroth


Running JDiff on Java 17 fails to produce the XML output. Logs show this 
illegal access error:

{code}
  [javadoc] error: fatal error encountered: java.lang.IllegalAccessError: 
superclass access check failed: class 
org.apache.hadoop.classification.tools.HadoopDocEnvImpl (in unnamed module 
@0x6a3c1b56) cannot access class jdk.javadoc.internal.tool.DocEnvImpl (in 
module jdk.javadoc) because module jdk.javadoc does not export 
jdk.javadoc.internal.tool to unnamed module @0x6a3c1b56
  [javadoc] error: Please file a bug against the javadoc tool via the Java bug 
reporting page
  [javadoc]   (https://bugreport.java.com) after checking the Bug Database 
(https://bugs.java.com)
  [javadoc]   for duplicates. Include error messages and the following 
diagnostic in your report. Thank you.
  [javadoc] java.lang.IllegalAccessError: superclass access check failed: class 
org.apache.hadoop.classification.tools.HadoopDocEnvImpl (in unnamed module 
@0x6a3c1b56) cannot access class jdk.javadoc.internal.tool.DocEnvImpl (in 
module jdk.javadoc) because module jdk.javadoc does not export 
jdk.javadoc.internal.tool to unnamed module @0x6a3c1b56
  [javadoc]     at java.base/java.lang.ClassLoader.defineClass1(Native Method)
  [javadoc]     at 
java.base/java.lang.ClassLoader.defineClass(ClassLoader.java:1017)
  [javadoc]     at 
java.base/java.security.SecureClassLoader.defineClass(SecureClassLoader.java:150)
  [javadoc]     at 
java.base/java.net.URLClassLoader.defineClass(URLClassLoader.java:524)
  [javadoc]     at 
java.base/java.net.URLClassLoader$1.run(URLClassLoader.java:427)
  [javadoc]     at 
java.base/java.net.URLClassLoader$1.run(URLClassLoader.java:421)
  [javadoc]     at 
java.base/java.security.AccessController.doPrivileged(AccessController.java:712)
  [javadoc]     at 
java.base/java.net.URLClassLoader.findClass(URLClassLoader.java:420)
  [javadoc]     at 
java.base/java.lang.ClassLoader.loadClass(ClassLoader.java:592)
  [javadoc]     at 
java.base/java.lang.ClassLoader.loadClass(ClassLoader.java:525)
  [javadoc]     at 
org.apache.hadoop.classification.tools.RootDocProcessor.process(RootDocProcessor.java:54)
  [javadoc]     at 
org.apache.hadoop.classification.tools.IncludePublicAnnotationsJDiffDoclet.run(IncludePublicAnnotationsJDiffDoclet.java:141)
  [javadoc]     at 
jdk.javadoc/jdk.javadoc.internal.tool.Start.parseAndExecute(Start.java:556)
  [javadoc]     at 
jdk.javadoc/jdk.javadoc.internal.tool.Start.begin(Start.java:393)
  [javadoc]     at 
jdk.javadoc/jdk.javadoc.internal.tool.Start.begin(Start.java:342)
  [javadoc]     at 
jdk.javadoc/jdk.javadoc.internal.tool.Main.execute(Main.java:63)
  [javadoc]     at jdk.javadoc/jdk.javadoc.internal.tool.Main.main(Main.java:52)
  [javadoc] 2 errors
{code}




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