Integrated: 8256643: Terminally deprecate ThreadGroup stop, destroy, isDestroyed, setDaemon and isDaemon

[Alan Bateman]

On Thu, 19 Nov 2020 14:24:18 GMT, Alan Bateman <alanb at openjdk.org> wrote:

> This change terminally deprecates the following methods defined by java.lang.ThreadGroup 
> 
> - stop 
> - destroy 
> - isDestroyed 
> - setDaemon 
> - isDaemon 
> 
> The stop method has been deprecated since=1.2 because it is inherently unsafe. It is time to terminally deprecate this method so it can be removed in a future release. Thread.stop will be examined in a separate issue. 
> 
> The destroy, isDestroyed, setDaemon, isDaemon methods support the mechanism to explicitly or automatically destroy a thread group. As detailed in JDK-8252885, the mechanism to destroy thread groups is flawed and racy. Furthermore, this mechanism inhibits efforts to drop the reference from a thread group to its threads (so that thread creation, starting and termination do not need to coordinate with their thread group). These methods should be terminally deprecated so they can be degraded in a future release and eventually removed.
> 
> CSR with more information:  https://bugs.openjdk.java.net/browse/JDK-8256644

This pull request has now been integrated.

Changeset: 79e57ace
Author:    Alan Bateman <alanb at openjdk.org>
URL:       https://git.openjdk.java.net/jdk/commit/79e57ace
Stats:     26 lines in 4 files changed: 23 ins; 0 del; 3 mod

8256643: Terminally deprecate ThreadGroup stop, destroy, isDestroyed, setDaemon and isDaemon

Reviewed-by: serb, rriggs, iris, mchung, smarks

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PR: https://git.openjdk.java.net/jdk/pull/1318