[jira] [Commented] (GROOVY-7811) Block frequently occurs Groovy multithreading capabilities of mixin

["John Wagenleitner (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/GROOVY-7811?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15274558#comment-15274558 ] 

John Wagenleitner commented on GROOVY-7811:
-------------------------------------------

I also see the blocking which seems expected, but no deadlocks.  Just out of curiosity I tried removing the synchronized block and used an AtomicReference, that eliminates the blocking but did not have a significant boost in performance (not to mention it may not be correct since now the invalidSwitchPoints call could complete for a thread before the invalidation is done):

{code}
protected static final AtomicReference<SwitchPoint> switchPoint = new AtomicReference<SwitchPoint>(new SwitchPoint());
....
SwitchPoint old = switchPoint.get();
if (switchPoint.compareAndSet(old, new SwitchPoint())) {
    SwitchPoint.invalidateAll(new SwitchPoint[]{old});
}
{code}

This doesn't seem like an issue.

> Block frequently occurs Groovy multithreading capabilities of mixin
> -------------------------------------------------------------------
>
>                 Key: GROOVY-7811
>                 URL: https://issues.apache.org/jira/browse/GROOVY-7811
>             Project: Groovy
>          Issue Type: Bug
>    Affects Versions: 2.4.6
>            Reporter: 刘新宇
>            Priority: Blocker
>
> Groovy:2.4.6
> please see : http://stackoverflow.com/questions/36419161/block-frequently-occurs-groovy-multithreading-capabilities-of-mixin#comment60481097_36419161



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