[jira] [Commented] (CAMEL-20199) Complete support of Virtual Threads

["Claus Ibsen (Jira)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/CAMEL-20199?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=18101208#comment-18101208 ] 

Claus Ibsen commented on CAMEL-20199:
-------------------------------------

PR merged: https://github.com/apache/camel/pull/25240 — Remove ThreadLocal Yaml caching in SnakeYAMLDataFormat

> Complete support of Virtual Threads
> -----------------------------------
>
>                 Key: CAMEL-20199
>                 URL: https://issues.apache.org/jira/browse/CAMEL-20199
>             Project: Camel
>          Issue Type: Improvement
>          Components: came-core
>            Reporter: Nicolas Filotto
>            Assignee: Guillaume Nodet
>            Priority: Major
>             Fix For: 4.x
>
>
> For full support of Virtual Threads, several sub-tasks need to be done:
>  * Avoid Lengthy and Frequent Pinning by replacing synchronized blocks with ReentrantLocks (use the option {{-Djdk.tracePinnedThreads=full}} to print stack traces when a thread blocks while pinned)
>  * Don't Cache Expensive Reusable Objects in Thread-Local Variables by avoiding thread locals when possible since when using Virtual Threads, the objects will never be reused so if the thread-local variables are never reset, it will end up with an OOME.
>  * Use Semaphores to Limit Concurrency instead of relying on the size of the thread pool when applicable
>  * Allow to expose {{ThreadPerTaskExecutor}} through JMX indeed so far it is limited to {{ThreadPoolExecutor}}
> References [https://docs.oracle.com/en/java/javase/21/core/virtual-threads.html]



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