[jira] [Commented] (KAFKA-12358) Migrate to Java 11

["Dongjin Lee (Jira)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/KAFKA-12358?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17288430#comment-17288430 ] 

Dongjin Lee commented on KAFKA-12358:
-------------------------------------

https://github.com/apache/kafka/pull/10176

Here is a draft implementation of Java 11 migration. If anyone encounters this issue, please notify me - then I will submit the KIP. Thanks in advance.

> Migrate to Java 11
> ------------------
>
>                 Key: KAFKA-12358
>                 URL: https://issues.apache.org/jira/browse/KAFKA-12358
>             Project: Kafka
>          Issue Type: Improvement
>            Reporter: Dongjin Lee
>            Assignee: Dongjin Lee
>            Priority: Major
>              Labels: needs-kip
>
> I found this problem when I was working on [KAFKA-12324|https://issues.apache.org/jira/browse/KAFKA-12324].
> As of present, Kafka Connect and Trogdor are using Jetty 9. Although Jetty's stable release is 9.4, the Jetty community is now moving their focus to Jetty 10 and 11, which requires Java 11 as a prerequisite. To minimize potential security vulnerability, Kafka should migrate into Java 11 + Jetty 11 as soon as Jetty 9.4 reaches the end of life. As a note, [Jetty 9.2 reached End of Life in March 2018|https://www.eclipse.org/lists/jetty-announce/msg00116.html] and 9.3 also did in [February 2020|https://www.eclipse.org/lists/jetty-announce/msg00140.html].
> In other words, the necessity of moving to Java 11 is heavily affected by Jetty's maintenance plan. Jetty 9.4 seems like still be supported for a certain period of time, but it is worth being aware of these relationships and having a migration plan beforehand.
> For the java-scala compatibility, we have no issue. The recommended Scala versions to Java 11 are 2.13.0 and 2.12.4, and we are already using the later version. See: https://docs.scala-lang.org/overviews/jdk-compatibility/overview.html



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