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  1. Jenkins
  2. JENKINS-73980

Killing threads not possible while using Java21

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    • Icon: Bug Bug
    • Resolution: Fixed
    • Icon: Minor Minor
    • monitoring-plugin
    • None
    • Jenkins 2.462.1 Java 21

      Hello,

      When I click kill thread button on /monitoring page, I got following error:

      Caught unhandled exception with ID 53bf818a-5713-408c-aebe-0578be8d7232
java.lang.UnsupportedOperationException
	at java.base/java.lang.Thread.stop(Unknown Source)
	at PluginClassLoader for monitoring//net.bull.javamelody.internal.model.Action.stopThread(Action.java:554)
	at PluginClassLoader for monitoring//net.bull.javamelody.internal.model.Action.killThread(Action.java:540)
	at PluginClassLoader for monitoring//net.bull.javamelody.internal.model.Action.execute(Action.java:292)

      Issue does not occur when I click same button on Jenkins instance based on Java 17

      Looks like Thread.stop method was removed from Java 21

      https://docs.oracle.com/en/java/javase/21/docs/api/java.base/java/lang/doc-files/threadPrimitiveDeprecation.html

       

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          screenshot-1.png
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          [JENKINS-73980] Killing threads not possible while using Java21

          Jan Gałda created issue -

          evernat added a comment -

          Indeed Thread.stop throws UnsupportedOperation since Java 20

          https://bugs.openjdk.org/browse/JDK-8289610
          https://github.com/openjdk/jdk/commit/acd5bcfc8897908d82e9008ee2def9476f046a4d

          evernat added a comment - Indeed Thread.stop throws UnsupportedOperation since Java 20 https://bugs.openjdk.org/browse/JDK-8289610 https://github.com/openjdk/jdk/commit/acd5bcfc8897908d82e9008ee2def9476f046a4d

          evernat added a comment -

          fixed by removing the Kill thread buttons.
          https://github.com/javamelody/javamelody/commit/52c39b4
          https://github.com/javamelody/javamelody/commit/b913c6c

          evernat added a comment - fixed by removing the Kill thread buttons. https://github.com/javamelody/javamelody/commit/52c39b4 https://github.com/javamelody/javamelody/commit/b913c6c
          evernat made changes -
          Resolution New: Fixed [ 1 ]
          Status Original: Open [ 1 ] New: Fixed but Unreleased [ 10203 ]

          Jan Gałda added a comment -

          Thanks for checking, would it be possible to replace `stop` button with `interrupt` button?
          `.interrupt()` method allows to stop hung threads

          Jan Gałda added a comment - Thanks for checking, would it be possible to replace `stop` button with `interrupt` button? `.interrupt()` method allows to stop hung threads
          evernat made changes -
          Attachment New: screenshot-1.png [ 63611 ]

          evernat added a comment -

          jgalda There is already an interrupt button in the list of threads to send the interrupt signal to a java thread :

          So the answer is yes and it is already done.

          evernat added a comment - jgalda There is already an interrupt button in the list of threads to send the interrupt signal to a java thread : So the answer is yes and it is already done.

          evernat added a comment - - edited

          the fix to remove the kill/stop button when Java 21+ will be released in version 2.4.0 in some time.

          evernat added a comment - - edited the fix to remove the kill/stop button when Java 21+ will be released in version 2.4.0 in some time.
          evernat made changes -
          Status Original: Fixed but Unreleased [ 10203 ] New: Resolved [ 5 ]
          evernat made changes -
          Status Original: Resolved [ 5 ] New: Closed [ 6 ]

            evernat evernat
            jgalda Jan Gałda
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              Created:
              Updated:
              Resolved: