[jira] [Updated] (CASSANDRA-20677) Migrate to JDK11 DirectByteBuffer cleaner (unsafe)

["Sam Lightfoot (Jira)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/CASSANDRA-20677?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Sam Lightfoot updated CASSANDRA-20677:
--------------------------------------
    Complexity: Low Hanging Fruit  (was: Normal)

> Migrate to JDK11 DirectByteBuffer cleaner (unsafe)
> --------------------------------------------------
>
>                 Key: CASSANDRA-20677
>                 URL: https://issues.apache.org/jira/browse/CASSANDRA-20677
>             Project: Apache Cassandra
>          Issue Type: Improvement
>          Components: Local/Other
>            Reporter: Sam Lightfoot
>            Assignee: Sam Lightfoot
>            Priority: Normal
>
> Per comments in FileUtils::clean
> {code:java}
> // TODO Once we can get rid of Java 8, it's simpler to call sun.misc.Unsafe.invokeCleaner(ByteBuffer),
> // but need to take care of the attachment handling (i.e. whether 'buf' is a duplicate or slice) - that
> // is different in sun.misc.Unsafe.invokeCleaner and this implementation. {code}
> We can now use Unsafe.invokeCleaner to clean direct byte buffers which should tidy up the existing code.



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