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https://issues.apache.org/jira/browse/HADOOP-19574?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=18016850#comment-18016850
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ASF GitHub Bot commented on HADOOP-19574:
-----------------------------------------
stoty commented on code in PR #7892:
URL: https://github.com/apache/hadoop/pull/7892#discussion_r2308192881
##########
hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/util/Daemon.java:
##########
@@ -18,16 +18,59 @@
package org.apache.hadoop.util;
+import java.security.PrivilegedAction;
import java.util.concurrent.ThreadFactory;
+import javax.security.auth.Subject;
+
import org.apache.hadoop.classification.InterfaceAudience;
import org.apache.hadoop.classification.InterfaceStability;
+import org.apache.hadoop.security.authentication.util.SubjectUtil;
-/** A thread that has called {@link Thread#setDaemon(boolean) } with true.*/
+/** A thread that has called {@link Thread#setDaemon(boolean) } with true.
+ *
+ * The runnable code must either be specified in the runnable parameter or
+ * in the override work() method.
+ *
+ * The subject propagation is already added in either case.
+ *
+ * */
@InterfaceAudience.LimitedPrivate({"HDFS", "MapReduce"})
@InterfaceStability.Unstable
public class Daemon extends Thread {
+ Subject startSubject;
+
+ @Override
+ public final void start() {
+ startSubject = SubjectUtil.current();
+ super.start();
+ }
+
+ /**
+ * Override this instead of run()
+ */
+ public void work() {
+ throw new IllegalArgumentException("");
Review Comment:
I changed the logic to match the the one in Thread.
> Restore Subject propagation semantics for Java 22+
> --------------------------------------------------
>
> Key: HADOOP-19574
> URL: https://issues.apache.org/jira/browse/HADOOP-19574
> Project: Hadoop Common
> Issue Type: Bug
> Reporter: Istvan Toth
> Assignee: Istvan Toth
> Priority: Critical
> Labels: pull-request-available
>
> Java 22 breaks Subject propagation for new Threads (when SecurityManager is
> not enabled).
> Previously, the Subject set by Subject.doAs() / Subject.callAs()
> automatically propagated to any new Threads created (via new Thread(), not
> Executors).
> With JDK22, this is no longer the case, new Threads do NOT inherit the
> Subject.
> As Hadoop heavily relies on the original behavior, we somehow need to solve
> this problem.
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