From 2802a3c497cb6081b579d0bc2eea4b6afafec099 Mon Sep 17 00:00:00 2001
From: Chris Nauroth <cnauroth@apache.org>
Date: Thu, 2 Apr 2026 19:42:36 +0000
Subject: [PATCH] HADOOP-19856: JDiff fails with IllegalAccessError on Java 17

---
 hadoop-mapreduce-project/hadoop-mapreduce-client/pom.xml | 2 ++
 hadoop-project-dist/pom.xml                              | 2 ++
 hadoop-yarn-project/hadoop-yarn/pom.xml                  | 2 ++
 3 files changed, 6 insertions(+)

diff --git a/hadoop-mapreduce-project/hadoop-mapreduce-client/pom.xml b/hadoop-mapreduce-project/hadoop-mapreduce-client/pom.xml
index e64815c43fc72..acca311eb53c0 100644
--- a/hadoop-mapreduce-project/hadoop-mapreduce-client/pom.xml
+++ b/hadoop-mapreduce-project/hadoop-mapreduce-client/pom.xml
@@ -299,6 +299,7 @@
                     <classpath>
                       <path refid="maven.compile.classpath"/>
                     </classpath>
+                    <arg value="-J--add-opens=jdk.javadoc/jdk.javadoc.internal.tool=ALL-UNNAMED"/>
                   </javadoc>
                   <javadoc sourcepath="${basedir}/src/main/java"
                            destdir="${project.build.directory}/site/jdiff/xml"
@@ -319,6 +320,7 @@
                     <classpath>
                       <path refid="maven.compile.classpath"/>
                     </classpath>
+                    <arg value="-J--add-opens=jdk.javadoc/jdk.javadoc.internal.tool=ALL-UNNAMED"/>
                   </javadoc>
                   <property name="compile_classpath" refid="maven.compile.classpath"/>
 
diff --git a/hadoop-project-dist/pom.xml b/hadoop-project-dist/pom.xml
index 2f22d4a40f19e..b162566bdcff5 100644
--- a/hadoop-project-dist/pom.xml
+++ b/hadoop-project-dist/pom.xml
@@ -290,6 +290,7 @@
                       <classpath>
                         <path refid="maven.compile.classpath"/>
                       </classpath>
+                      <arg value="-J--add-opens=jdk.javadoc/jdk.javadoc.internal.tool=ALL-UNNAMED"/>
                     </javadoc>
                     <javadoc sourcepath="${basedir}/src/main/java"
                              destdir="${project.build.directory}/site/jdiff/xml"
@@ -311,6 +312,7 @@
                       <classpath>
                         <path refid="maven.compile.classpath"/>
                       </classpath>
+                      <arg value="-J--add-opens=jdk.javadoc/jdk.javadoc.internal.tool=ALL-UNNAMED"/>
                     </javadoc>
                   </target>
                 </configuration>
diff --git a/hadoop-yarn-project/hadoop-yarn/pom.xml b/hadoop-yarn-project/hadoop-yarn/pom.xml
index 903d6f28b0e30..572f7f420635d 100644
--- a/hadoop-yarn-project/hadoop-yarn/pom.xml
+++ b/hadoop-yarn-project/hadoop-yarn/pom.xml
@@ -206,6 +206,7 @@
                       <classpath>
                         <path refid="maven.compile.classpath"/>
                       </classpath>
+                      <arg value="-J--add-opens=jdk.javadoc/jdk.javadoc.internal.tool=ALL-UNNAMED"/>
                     </javadoc>
                     <javadoc sourcepath="${basedir}/src/main/java"
                       destdir="${project.build.directory}/site/jdiff/xml"
@@ -227,6 +228,7 @@
                       <classpath>
                         <path refid="maven.compile.classpath"/>
                       </classpath>
+                      <arg value="-J--add-opens=jdk.javadoc/jdk.javadoc.internal.tool=ALL-UNNAMED"/>
                     </javadoc>
 
                   </target>