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From "Ilya Berezhniuk (JIRA)" <j...@apache.org>
Subject [jira] Updated: (HARMONY-4766) [drlvm][thread] ThreadGroup.destroy() does not destroy groups with non-started threads
Date Mon, 10 Sep 2007 22:47:29 GMT

     [ https://issues.apache.org/jira/browse/HARMONY-4766?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel

Ilya Berezhniuk updated HARMONY-4766:

    Attachment: TG1.java

The test was updated to show additional details on RI behavior:
- group can be destroyed with empty subgroup;
- group can be destroyed with a subgroup non-started thread;
- group cannot be destroyed with a subgroup with terminated thread.

> [drlvm][thread] ThreadGroup.destroy() does not destroy groups with non-started threads
> --------------------------------------------------------------------------------------
>                 Key: HARMONY-4766
>                 URL: https://issues.apache.org/jira/browse/HARMONY-4766
>             Project: Harmony
>          Issue Type: Bug
>          Components: DRLVM
>            Reporter: Ilya Berezhniuk
>         Attachments: TG1.java, TG1.java, TG1.java
> While investigating HARMONY-4361 I've discovered that ThreadGroup.destroy() behavior
does not match RI behavior.
> I did not experiment with daemon groups, but for non-daemon groups ThreadGroup.destroy()
throws j.l.IllegalThreadStateException when trying to destroy thread group containing thread
which is not started yet.
> API spec. says: "This thread group must be empty, indicating that all threads that had
been in this thread group have since stopped"
> In other words, it should be possible to destroy group containing stopped thread, and
also containing subgroups with stopped threads.
> Spec. says nothing about non-started threads... 
> I've wrote simple test to check RI behavior, and on both Sun and BEA VMs it's OK to destroy
group with a thread which is not started yet.
> Harmony throws exception for not started threads.
> It's possible that some points in my test are incorrect, but it's evident that Harmony
behavior essentially differs from RI behavior.

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