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Posted to issues@artemis.apache.org by "ASF GitHub Bot (Jira)" <ji...@apache.org> on 2026/08/18 03:48:00 UTC
[jira] [Work logged] (ARTEMIS-5948) Use jctools-core-jdk11 Unsafe-free varhandle replacements
[ https://issues.apache.org/jira/browse/ARTEMIS-5948?focusedWorklogId=1036230&page=com.atlassian.jira.plugin.system.issuetabpanels:worklog-tabpanel#worklog-1036230 ]
ASF GitHub Bot logged work on ARTEMIS-5948:
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Author: ASF GitHub Bot
Created on: 18/Aug/26 03:47
Start Date: 18/Aug/26 03:47
Worklog Time Spent: 10m
Work Description: jbertram commented on PR #6289:
URL: https://github.com/apache/artemis/pull/6289#issuecomment-5323342619
JCTools 4.0.7 has been released and Artemis has been updated to use it (see #6624) so I think this can move forward.
Issue Time Tracking
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Worklog Id: (was: 1036230)
Time Spent: 1h 20m (was: 1h 10m)
> Use jctools-core-jdk11 Unsafe-free varhandle replacements
> ---------------------------------------------------------
>
> Key: ARTEMIS-5948
> URL: https://issues.apache.org/jira/browse/ARTEMIS-5948
> Project: Artemis
> Issue Type: Improvement
> Reporter: Christian Ortlepp
> Priority: Major
> Labels: pull-request-available
> Time Spent: 1h 20m
> Remaining Estimate: 0h
>
> Artemis currently uses some queues from jctools-core which rely on sun.misc.Unsafe internally. These methods are deprecated in JDK24+, issue a warning at runtime and will be removed in future versions of the JDK. Thus it makes sense to switch to an implementation which does not rely on those methods.
> In their latest [release|https://github.com/JCTools/JCTools/releases/tag/v4.0.6] JCTools have started to publish a new artifact, jctools-core-jdk11, which contains alternative Varhandle based implementations which do not use Unsafe. As far as I understand them they are designed to be a drop-in replacement to the existing Unsafe implementations.
> It would be great if we could either switch to the new implementations entirely or provide it as an option somehow for the people that would like to avoid Unsafe. I will link a PR shortly where I switched over to the new implementation, but I am open to feedback if for example we can only do this change opt-in.
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